EWG's Tap Water Database: What's in Your Drinking Water? (2024)

Table of Contents
Utility Details Contaminants Detected What To Do PFAS Detected (UCMR-5 Update) Contaminants Detected Table* Looking for a countertop water filter? Find out which filters earned EWG's recommendation Contaminants Detected Bromodichloromethane Bromodichloromethane Bromodichloromethane was found at 72 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Chloroform Chloroform Chloroform was found at 11 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Chromium (hexavalent)* Chromium (hexavalent) Chromium (hexavalent) was found at 3.1 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dibromoacetic acid Dibromoacetic acid Dibromoacetic acid was found at 34 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dibromochloromethane Dibromochloromethane Dibromochloromethane was found at 26 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dichloroacetic acid Dichloroacetic acid Dichloroacetic acid was found at 48 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Haloacetic acids (HAA5)† Haloacetic acids (HAA5) Haloacetic acids (HAA5) was found at 136 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Haloacetic acids (HAA9)*† Haloacetic acids (HAA9) Haloacetic acids (HAA9) was found at 278 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Total trihalomethanes (TTHMs)† Total trihalomethanes (TTHMs) Total trihalomethanes (TTHMs) was found at 75 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Trichloroacetic acid Trichloroacetic acid Trichloroacetic acid was found at 14 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options 1,4-Dioxane* 1,4-Dioxane How your levels compare Health Risks Pollution Sources Filtering Options Bromoform Bromoform How your levels compare Health Risks Pollution Sources Filtering Options Chlorate* Chlorate How your levels compare Health Risks Pollution Sources Chromium (total)* Chromium (total) How your levels compare Pollution Sources Filtering Options Fluoride* Fluoride How your levels compare Pollution Sources Filtering Options Manganese* Manganese How your levels compare Health Risks Pollution Sources Filtering Options Monobromoacetic acid Monobromoacetic acid How your levels compare Health Risks Pollution Sources Filtering Options Monochloroacetic acid* Monochloroacetic acid How your levels compare Health Risks Pollution Sources Filtering Options Nitrate* Nitrate How your levels compare Health Risks Pollution Sources Filtering Options Nitrate and nitrite* Nitrate and nitrite How your levels compare Health Risks Pollution Sources Filtering Options Strontium* Strontium How your levels compare Health Risks Pollution Sources Filtering Options Vanadium* Vanadium How your levels compare Health Risks Pollution Sources Filtering Options Other Contaminants Tested Folly Beach, City of compliance with legally mandated federal standards: Water Filters That Can Reduce Contaminant Levels Take Action Contact Your Local Official Filter Out Contaminants Get the guide

EWG's drinking water quality report showsresults of tests conducted by the water utility and provided to the Environmental Working Group by the South Carolina Department of Health & Environmental Control, as well asinformation from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2021 - March 2021), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

Utility Details

  • Folly Beach, South Carolina
  • Serves: 3,852
  • Data available: 2014-2019
  • Source: Purchased surface water

Contaminants Detected

10

EXCEED
EWG HEALTH
GUIDELINES

22 Total Contaminants

  • Legal does not necessarily equal safe. Getting a passing grade from the federal government does not mean the water meets the latest health guidelines.
  • Legal limits for contaminants in tap water have not been updated in almost 20 years.
  • The best way to ensure clean tap water is to keep pollution out of source water in the first place.

What To Do

Filter contaminants outContact Your Local OfficialWhat About Lead?

PFAS Detected (UCMR-5 Update)

The Environmental Protection Agency in August 2023 released a set of public water system testing data for the “forever chemicals” known asPFAS, as required by itsFifth Unregulated Contaminant Monitoring Rule, or UCMR5. The EPA released the following results.

Contaminants Detected Table*

PFAS NAMEDETECTS/SAMPLES% DETECTEDRANGE OF
SAMPLE(S)
DATE(S) OF
SAMPLES
PROPOSED
LEGAL LIMIT
PFBA1 / 333%0.0 - 5.3 ppt01/10/2023 - 07/24/2023
PFBS3 / 3100%3.4 - 3.7 ppt01/10/2023 - 07/24/2023Hazard Index
PFHxA3 / 3100%4.0 - 6.1 ppt01/10/2023 - 07/24/2023
PFOA3 / 3100%4.2 - 4.4 ppt01/10/2023 - 07/24/20234 ppt
PFOS3 / 3100%5.5 - 6.6 ppt01/10/2023 - 07/24/20234 ppt
PFPeA3 / 3100%4.3 - 7.3 ppt01/10/2023 - 07/24/2023

Looking for a countertop water filter?

Find out which filters earned EWG's recommendation

See the guide

Contaminants Detected

Bromodichloromethane

Potential Effect: cancer72x EWG'S HEALTH GUIDELINE

THIS UTILITY4.33 ppb

EWG HEALTH GUIDELINE0.06 ppb

NO LEGAL LIMIT

DETAILS

X

Bromodichloromethane

more aboutthis contaminant

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Bromodichloromethane was found at 72 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

4.33 ppb

National Average

5.79 ppb

State Average

6.08 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (2)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (3)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (4)

Reverse Osmosis

Chloroform

Potential Effect: cancer11x EWG'S HEALTH GUIDELINE

THIS UTILITY4.32 ppb

EWG HEALTH GUIDELINE0.4 ppb

NO LEGAL LIMIT

DETAILS

X

Chloroform

more aboutthis contaminant

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

Chloroform was found at 11 times above EWG's Health Guideline.

EWG Health Guideline

0.4 ppb or less

This Utility

4.32 ppb

National Average

15.5 ppb

State Average

17.6 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (5)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (6)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (7)

Reverse Osmosis

Chromium (hexavalent)*

Potential Effect: cancer3.1x EWG'S HEALTH GUIDELINE

THIS UTILITY0.0623 ppb

EWG HEALTH GUIDELINE0.02 ppb

NO LEGAL LIMIT

DETAILS

X

Chromium (hexavalent)

more aboutthis contaminant

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

Chromium (hexavalent) was found at 3.1 times above EWG's Health Guideline.

EWG Health Guideline

0.02 ppb or less

This Utility

0.0623 ppb

National Average

0.484 ppb

State Average

0.0852 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (8)

Industry

EWG's Tap Water Database: What's in Your Drinking Water? (9)

Naturally Occurring

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (10)

Reverse Osmosis

EWG's Tap Water Database: What's in Your Drinking Water? (11)

Ion Exchange

Dibromoacetic acid

Potential Effect: 34x EWG'S HEALTH GUIDELINE

THIS UTILITY1.37 ppb

EWG HEALTH GUIDELINE0.04 ppb

NO LEGAL LIMIT

DETAILS

X

Dibromoacetic acid

more aboutthis contaminant

Dibromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Dibromoacetic acid was found at 34 times above EWG's Health Guideline.

EWG Health Guideline

0.04 ppb or less

This Utility

1.37 ppb

National Average

1.1 ppb

State Average

0.603 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (12)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (13)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (14)

Reverse Osmosis

Dibromochloromethane

Potential Effect: cancer26x EWG'S HEALTH GUIDELINE

THIS UTILITY2.59 ppb

EWG HEALTH GUIDELINE0.1 ppb

NO LEGAL LIMIT

DETAILS

X

Dibromochloromethane

more aboutthis contaminant

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Dibromochloromethane was found at 26 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

2.59 ppb

National Average

3.29 ppb

State Average

2.28 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (15)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (16)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (17)

Reverse Osmosis

Dichloroacetic acid

Potential Effect: cancer48x EWG'S HEALTH GUIDELINE

THIS UTILITY9.60 ppb

EWG HEALTH GUIDELINE0.2 ppb

NO LEGAL LIMIT

DETAILS

X

Dichloroacetic acid

more aboutthis contaminant

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Dichloroacetic acid was found at 48 times above EWG's Health Guideline.

EWG Health Guideline

0.2 ppb or less

This Utility

9.6 ppb

National Average

7.97 ppb

State Average

11.1 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (18)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (19)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (20)

Reverse Osmosis

Haloacetic acids (HAA5)†

Potential Effect: cancer136x EWG'S HEALTH GUIDELINE

THIS UTILITY13.6 ppb

EWG HEALTH GUIDELINE0.1 ppb

LEGAL LIMIT60 ppb

DETAILS

X

Haloacetic acids (HAA5)

more aboutthis contaminant

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid.

Haloacetic acids (HAA5) was found at 136 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

13.6 ppb

Legal Limit

60 ppb

National Average

17.1 ppb

State Average

20.2 ppb

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (21)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (22)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (23)

Reverse Osmosis

Haloacetic acids (HAA9)*†

Potential Effect: cancer278x EWG'S HEALTH GUIDELINE

THIS UTILITY16.7 ppb

EWG HEALTH GUIDELINE0.06 ppb

NO LEGAL LIMIT

DETAILS

X

Haloacetic acids (HAA9)

more aboutthis contaminant

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of nine haloacetic acids includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid, which are regulated as a group by the federal government (HAA5); and bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, and tribromoacetic acid.

Haloacetic acids (HAA9) was found at 278 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

16.7 ppb

National Average

23.7 ppb

State Average

23.2 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2021.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.06 ppb for the group of nine haloacetic acids, or HAA9, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level as . This health guideline protects against cancer.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (24)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (25)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (26)

Reverse Osmosis

Total trihalomethanes (TTHMs)†

Potential Effect: cancer75x EWG'S HEALTH GUIDELINE

THIS UTILITY11.3 ppb

EWG HEALTH GUIDELINE0.15 ppb

LEGAL LIMIT80 ppb

DETAILS

X

Total trihalomethanes (TTHMs)

more aboutthis contaminant

Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform.

Total trihalomethanes (TTHMs) was found at 75 times above EWG's Health Guideline.

EWG Health Guideline

0.15 ppb or less

This Utility

11.3 ppb

Legal Limit

80 ppb

National Average

29.7 ppb

State Average

26.4 ppb

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (27)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (28)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (29)

Reverse Osmosis

Trichloroacetic acid

Potential Effect: cancer14x EWG'S HEALTH GUIDELINE

THIS UTILITY1.37 ppb

EWG HEALTH GUIDELINE0.1 ppb

NO LEGAL LIMIT

DETAILS

X

Trichloroacetic acid

more aboutthis contaminant

Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Trichloroacetic acid was found at 14 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

1.37 ppb

National Average

6.62 ppb

State Average

7.35 ppb

NO LEGAL LIMIT

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

VIEW MORE TESTING DATA

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (30)

Treatment Byproducts

Filtering Options

EWG's Tap Water Database: What's in Your Drinking Water? (31)

Activated Carbon

EWG's Tap Water Database: What's in Your Drinking Water? (32)

Reverse Osmosis

Includes chemicals detected in 2017-2019 for which annual utility averages exceeded an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015 (and subsequent testing when available), for which annual utility averages exceeded a health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 4) program in 2017 to 2020 (and subsequent testing when available), for which annual utility averages exceeded a health guideline established by a federal or state public health authority.

*This water utility buys or otherwise receives some or all of its finished water from Charleston Water System. Tap water results marked with an * are from the supplying utility.

† HAA5 is a contaminant group that includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. HAA9 is a contaminant group that includes the chemicals in HAA5 and bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid and tribromoacetic acid. TTHM is a contaminant group that includes bromodichloromethane, bromoform, chloroform and dibromochloromethane.

    1,4-Dioxane*

    THIS UTILITY0.150 ppb

    EWG HEALTH GUIDELINE0.35 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    1,4-Dioxane

    more aboutthis contaminant

    1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff.

    How your levels compare

    EWG Health Guideline

    0.35 ppb or less

    This Utility

    0.15 ppb

    National Average

    0.0681 ppb

    State Average

    0.103 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 0.35 ppb for 1,4-dioxane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (33)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (34)

    Runoff & Sprawl

    Filtering Options

    Bromoform

    THIS UTILITY0.0588 ppb

    EWG HEALTH GUIDELINE0.5 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Bromoform

    more aboutthis contaminant

    Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    How your levels compare

    EWG Health Guideline

    0.5 ppb or less

    This Utility

    0.0588 ppb

    National Average

    1.32 ppb

    State Average

    0.54 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (36)

    Treatment Byproducts

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (37)

    Activated Carbon

    EWG's Tap Water Database: What's in Your Drinking Water? (38)

    Reverse Osmosis

    Chlorate*

    THIS UTILITY183.8 ppb

    EWG HEALTH GUIDELINE210 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Chlorate

    more aboutthis contaminant

    Chlorate forms in drinking water as a byproduct of disinfection. Chlorate impairs thyroid function, making chlorate exposure most harmful during pregnancy and childhood.

    How your levels compare

    EWG Health Guideline

    210 ppb or less

    This Utility

    183.8 ppb

    National Average

    114.8 ppb

    State Average

    133.9 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 210 ppb for chlorate was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against hormone disruption.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (39)

    Agriculture

    EWG's Tap Water Database: What's in Your Drinking Water? (40)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (41)

    Treatment Byproducts

    Chromium (total)*

    THIS UTILITY0.0350 ppb

    NO EWG HEALTH GUIDELINE

    LEGAL LIMIT100 ppb

    DETAILS

    X

    Chromium (total)

    more aboutthis contaminant

    Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

    How your levels compare

    This Utility

    0.035 ppb

    Legal Limit

    100 ppb

    National Average

    0.579 ppb

    State Average

    0.0707 ppb

    NO EWG HEALTH GUIDELINE

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppb = parts per billion

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (42)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (43)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (44)

    Reverse Osmosis

    EWG's Tap Water Database: What's in Your Drinking Water? (45)

    Ion Exchange

    Fluoride*

    THIS UTILITY0.402 ppm

    NO EWG HEALTH GUIDELINE

    LEGAL LIMIT4 ppm

    DETAILS

    X

    Fluoride

    more aboutthis contaminant

    Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems.

    How your levels compare

    This Utility

    0.402 ppm

    Legal Limit

    4 ppm

    National Average

    0.489 ppm

    State Average

    0.586 ppm

    NO EWG HEALTH GUIDELINE

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppm = parts per million

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (46)

    Treatment Byproducts

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (47)

    Reverse Osmosis

    Manganese*

    THIS UTILITY9.34 ppb

    EWG HEALTH GUIDELINE100 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Manganese

    more aboutthis contaminant

    Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

    How your levels compare

    EWG Health Guideline

    100 ppb or less

    This Utility

    9.34 ppb

    National Average

    10.1 ppb

    State Average

    8.28 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (48)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (49)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (50)

    Ion Exchange

    Monobromoacetic acid

    THIS UTILITY1.25 ppb

    EWG HEALTH GUIDELINE25 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Monobromoacetic acid

    more aboutthis contaminant

    Monobromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    How your levels compare

    EWG Health Guideline

    25 ppb or less

    This Utility

    1.25 ppb

    National Average

    0.227 ppb

    State Average

    1.05 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 25 ppb for monobromoacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against muscular degeneration.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (51)

    Treatment Byproducts

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (52)

    Activated Carbon

    EWG's Tap Water Database: What's in Your Drinking Water? (53)

    Reverse Osmosis

    Monochloroacetic acid*

    THIS UTILITY0.145 ppb

    EWG HEALTH GUIDELINE53 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Monochloroacetic acid

    more aboutthis contaminant

    Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

    How your levels compare

    EWG Health Guideline

    53 ppb or less

    This Utility

    0.145 ppb

    National Average

    0.495 ppb

    State Average

    0.109 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (54)

    Treatment Byproducts

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (55)

    Activated Carbon

    EWG's Tap Water Database: What's in Your Drinking Water? (56)

    Reverse Osmosis

    Nitrate*

    THIS UTILITY0.117 ppm

    EWG HEALTH GUIDELINE0.14 ppm

    LEGAL LIMIT10 ppm

    DETAILS

    X

    Nitrate

    more aboutthis contaminant

    Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

    How your levels compare

    EWG Health Guideline

    0.14 ppm or less

    This Utility

    0.117 ppm

    Legal Limit

    10 ppm

    National Average

    0.935 ppm

    State Average

    0.249 ppm

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppm = parts per million

    Health Risks

    The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (57)

    Agriculture

    EWG's Tap Water Database: What's in Your Drinking Water? (58)

    Runoff & Sprawl

    EWG's Tap Water Database: What's in Your Drinking Water? (59)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (60)

    Reverse Osmosis

    EWG's Tap Water Database: What's in Your Drinking Water? (61)

    Ion Exchange

    Nitrate and nitrite*

    THIS UTILITY0.1000 ppm

    EWG HEALTH GUIDELINE0.14 ppm

    LEGAL LIMIT10 ppm

    DETAILS

    X

    Nitrate and nitrite

    more aboutthis contaminant

    Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

    How your levels compare

    EWG Health Guideline

    0.14 ppm or less

    This Utility

    0.1 ppm

    Legal Limit

    10 ppm

    National Average

    0.888 ppm

    State Average

    0.222 ppm

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
    ppm = parts per million

    Health Risks

    The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (62)

    Agriculture

    EWG's Tap Water Database: What's in Your Drinking Water? (63)

    Runoff & Sprawl

    EWG's Tap Water Database: What's in Your Drinking Water? (64)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (65)

    Reverse Osmosis

    EWG's Tap Water Database: What's in Your Drinking Water? (66)

    Ion Exchange

    Strontium*

    THIS UTILITY0.0535 ppb

    EWG HEALTH GUIDELINE1,500 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Strontium

    more aboutthis contaminant

    Strontium is a metal that accumulates in the bones. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health.

    How your levels compare

    EWG Health Guideline

    1,500 ppb or less

    This Utility

    0.0535 ppb

    National Average

    3.33 ppb

    State Average

    0.044 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against harm to bones.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (67)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (68)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (69)

    Reverse Osmosis

    EWG's Tap Water Database: What's in Your Drinking Water? (70)

    Ion Exchange

    Vanadium*

    THIS UTILITY0.930 ppb

    EWG HEALTH GUIDELINE21 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Vanadium

    more aboutthis contaminant

    Vanadium is a metal used in steels and other alloys. People are commonly exposed to vanadium in water and food. Excessive exposure can be toxic during pregnancy and childhood.

    How your levels compare

    EWG Health Guideline

    21 ppb or less

    This Utility

    0.93 ppb

    National Average

    1.59 ppb

    State Average

    0.405 ppb

    NO LEGAL LIMIT

    The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
    ppb = parts per billion

    Health Risks

    The EWG Health Guideline of 21 ppb for vanadium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

    VIEW MORE TESTING DATA

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (71)

    Industry

    EWG's Tap Water Database: What's in Your Drinking Water? (72)

    Naturally Occurring

    Filtering Options

    EWG's Tap Water Database: What's in Your Drinking Water? (73)

    Ion Exchange

    Includes chemicals detected in 2017-2019 for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015 (and subsequent testing when available), for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority.

Other Contaminants Tested

Chemicals tested for but not detected from 2014 to 2019:

Monochloroacetic acid

Folly Beach, City of compliance with legally mandated federal standards:

  • From April 2019 to March 2021, Folly Beach, City ofcomplied with health-based drinking water standards.

Information in this section on Folly Beach, City of comes from the U.S. EPA Enforcement and Compliance History Online database (ECHO).

LEARN MORE ABOUT THIS UTILITY

Water Filters That Can Reduce Contaminant Levels

ContaminantActivated CarbonEWG's Tap Water Database: What's in Your Drinking Water? (74)Reverse OsmosisEWG's Tap Water Database: What's in Your Drinking Water? (75)Ion ExchangeEWG's Tap Water Database: What's in Your Drinking Water? (76)
CONTAMINANTS ABOVE
HEALTH GUIDELINES
Bromodichloromethane
Chloroform
Chromium (hexavalent)
Dibromoacetic acid
Dibromochloromethane
Dichloroacetic acid
Haloacetic acids (HAA5)
Haloacetic acids (HAA9)
Total trihalomethanes (TTHMs)
Trichloroacetic acid
OTHER CONTAMINANTS
DETECTED
1,4-Dioxane
Bromoform
Chlorate
Chromium (total)
Fluoride
Manganese
Monobromoacetic acid
Monochloroacetic acid
Nitrate
Nitrate & nitrite
Strontium
Vanadium

Take Action

Contact Your Local Official

One of the best ways to push for cleaner water is to hold accountable the elected officials who have a say in water quality – from city hall and the state legislature to Congress all the way to the Oval Office – by asking questions and demanding answers.

LEARN MORE

Filter Out Contaminants

Check out our recommendations for filters to protect your water against the detected contaminants.

EWG’S WATER FILTER GUIDE

EWG's Tap Water Database: What's in Your Drinking Water? (78)

EWG drinking water standards
Have a question?

EWG’s Tap Water Database is provided solely for your personal, non-commercial use. You may not copy, reproduce, republish or distribute information from EWG’s Tap Water Database without EWG’s prior written permission. For information about licensing EWG data and analyses, contact permissionrequests[at]ewg.org.

EWG's Tap Water Database: What's in Your Drinking Water? (81)

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EWG's Tap Water Database: What's in Your Drinking Water? (2024)
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