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

Table of Contents
Utility Details Contaminants Detected What To Do Looking for a countertop water filter? Find out which filters earned EWG's recommendation Contaminants Detected Bromodichloromethane Bromodichloromethane Bromodichloromethane was found at 23 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Chloroform Chloroform Chloroform was found at 8.9 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dibromoacetic acid Dibromoacetic acid Dibromoacetic acid was found at 3.8 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dibromochloromethane Dibromochloromethane Dibromochloromethane was found at 8.2 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Dichloroacetic acid Dichloroacetic acid Dichloroacetic acid was found at 9.4 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Haloacetic acids (HAA5)† Haloacetic acids (HAA5) Haloacetic acids (HAA5) was found at 30 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Haloacetic acids (HAA9)† Haloacetic acids (HAA9) Haloacetic acids (HAA9) was found at 109 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Radium, combined (-226 & -228) Radium, combined (-226 & -228) Radium, combined (-226 & -228) was found at 3.8 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Total trihalomethanes (TTHMs)† Total trihalomethanes (TTHMs) Total trihalomethanes (TTHMs) was found at 43 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Trichloroacetic acid Trichloroacetic acid Trichloroacetic acid was found at 9.8 times above EWG's Health Guideline. Health Risks Pollution Sources Filtering Options Aluminum Aluminum How your levels compare Health Risks Pollution Sources Filtering Options Di(2-ethylhexyl) phthalate Di(2-ethylhexyl) phthalate How your levels compare Health Risks 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 Monochloroacetic acid Monochloroacetic acid 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 Pentachlorophenol Pentachlorophenol How your levels compare Health Risks Pollution Sources Filtering Options Strontium Strontium How your levels compare Health Risks Pollution Sources Filtering Options Tribufos Tribufos How your levels compare Pollution Sources Filtering Options Other Contaminants Tested Covington Water Supply 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 drinking water standards Have a question? References

EWG's drinking water quality report showsresults of tests conducted by the water utility and provided to the Environmental Working Group by the Louisiana Department of Health and Hospitals, 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

  • Covington, Louisiana
  • Serves: 14,700
  • Data available: 2014-2019
  • Source: Groundwater

Contaminants Detected

10

EXCEED
EWG HEALTH
GUIDELINES

19 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.

Looking for a countertop water filter?

Find out which filters earned EWG's recommendation

See the guide

Contaminants Detected

Bromodichloromethane

Potential Effect: cancer23x EWG'S HEALTH GUIDELINE

THIS UTILITY1.36 ppb

EWG HEALTH GUIDELINE0.06 ppb

NO LEGAL LIMIT

DETAILS

X

Bromodichloromethane

more about
this 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 23 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

1.36 ppb

National Average

5.79 ppb

State Average

6.44 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.

Pollution Sources

EWG's Tap Water Database: What's in Your Drinking Water? (1)

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Chloroform

Potential Effect: cancer8.9x EWG'S HEALTH GUIDELINE

THIS UTILITY3.56 ppb

EWG HEALTH GUIDELINE0.4 ppb

NO LEGAL LIMIT

DETAILS

X

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 8.9 times above EWG's Health Guideline.

EWG Health Guideline

0.4 ppb or less

This Utility

3.56 ppb

National Average

15.5 ppb

State Average

14.6 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Dibromoacetic acid

Potential Effect: 3.8x EWG'S HEALTH GUIDELINE

THIS UTILITY0.151 ppb

EWG HEALTH GUIDELINE0.04 ppb

NO LEGAL LIMIT

DETAILS

X

Dibromoacetic acid

more about
this 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 3.8 times above EWG's Health Guideline.

EWG Health Guideline

0.04 ppb or less

This Utility

0.151 ppb

National Average

1.1 ppb

State Average

1.51 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Dibromochloromethane

Potential Effect: cancer8.2x EWG'S HEALTH GUIDELINE

THIS UTILITY0.817 ppb

EWG HEALTH GUIDELINE0.1 ppb

NO LEGAL LIMIT

DETAILS

X

Dibromochloromethane

more about
this 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 8.2 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

0.817 ppb

National Average

3.29 ppb

State Average

4.28 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Dichloroacetic acid

Potential Effect: cancer9.4x EWG'S HEALTH GUIDELINE

THIS UTILITY1.88 ppb

EWG HEALTH GUIDELINE0.2 ppb

NO LEGAL LIMIT

DETAILS

X

Dichloroacetic acid

more about
this 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 9.4 times above EWG's Health Guideline.

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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Haloacetic acids (HAA5)†

Potential Effect: cancer30x EWG'S HEALTH GUIDELINE

THIS UTILITY3.03 ppb

EWG HEALTH GUIDELINE0.1 ppb

LEGAL LIMIT60 ppb

DETAILS

X

Haloacetic acids (HAA5)

more about
this 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 30 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

3.03 ppb

Legal Limit

60 ppb

National Average

17.1 ppb

State Average

16.9 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Haloacetic acids (HAA9)†

Potential Effect: cancer109x EWG'S HEALTH GUIDELINE

THIS UTILITY6.55 ppb

EWG HEALTH GUIDELINE0.06 ppb

NO LEGAL LIMIT

DETAILS

X

Haloacetic acids (HAA9)

more about
this 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 109 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

6.55 ppb

National Average

23.7 ppb

State Average

22 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. This health guideline protects against cancer.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Radium, combined (-226 & -228)

Potential Effect: cancer3.8x EWG'S HEALTH GUIDELINE

THIS UTILITY0.19 pCi/L

EWG HEALTH GUIDELINE0.05 pCi/L

LEGAL LIMIT5 pCi/L

DETAILS

X

Radium, combined (-226 & -228)

more about
this contaminant

Radium is a radioactive element that causes bone cancer and other cancers. It can occur naturally in groundwater, and oil and gas extraction activities such as hydraulic fracturing can elevate concentrations.

Radium, combined (-226 & -228) was found at 3.8 times above EWG's Health Guideline.

EWG Health Guideline

0.05 pCi/L or less

This Utility

0.19 pCi/L

Legal Limit

5 pCi/L

National Average

0.46 pCi/L

State Average

0.34 pCi/L

The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2014-2019.
pCi/L = picocuries per liter

Health Risks

EWG applied the health guideline of 0.05 pCi/L, defined by the California Office of Environmental Health Hazard Assessment as a public health goal for radium-226, to radium-226 and radium-228 combined. This health guideline protects against cancer.

Pollution Sources

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

Industry

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

Naturally Occurring

Filtering Options

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

Reverse Osmosis

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

Ion Exchange

Total trihalomethanes (TTHMs)†

Potential Effect: cancer43x EWG'S HEALTH GUIDELINE

THIS UTILITY6.46 ppb

EWG HEALTH GUIDELINE0.15 ppb

LEGAL LIMIT80 ppb

DETAILS

X

Total trihalomethanes (TTHMs)

more about
this 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 43 times above EWG's Health Guideline.

EWG Health Guideline

0.15 ppb or less

This Utility

6.46 ppb

Legal Limit

80 ppb

National Average

29.7 ppb

State Average

28.2 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 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

Reverse Osmosis

Trichloroacetic acid

Potential Effect: cancer9.8x EWG'S HEALTH GUIDELINE

THIS UTILITY0.978 ppb

EWG HEALTH GUIDELINE0.1 ppb

NO LEGAL LIMIT

DETAILS

X

Trichloroacetic acid

more about
this 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 9.8 times above EWG's Health Guideline.

EWG Health Guideline

0.1 ppb or less

This Utility

National Average

6.62 ppb

State Average

5.52 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.

Pollution Sources

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

Treatment Byproducts

Filtering Options

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

Activated Carbon

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

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 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; radiological contaminants detected between 2014 and 2019.

† 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.

    Aluminum

    THIS UTILITY18.3 ppb

    EWG HEALTH GUIDELINE600 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Aluminum is a metal released from metal refineries and mining operations. Too much aluminum exposure can impair children's brain development.

    How your levels compare

    EWG Health Guideline

    600 ppb or less

    This Utility

    18.3 ppb

    National Average

    22.7 ppb

    State Average

    51.4 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 600 ppb for aluminum 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 harm to the brain and nervous system.

    Pollution Sources

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

    Industry

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

    Naturally Occurring

    Filtering Options

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

    Reverse Osmosis

    Di(2-ethylhexyl) phthalate

    THIS UTILITY0.233 ppb

    EWG HEALTH GUIDELINE3 ppb

    LEGAL LIMIT6 ppb

    DETAILS

    X

    Di(2-ethylhexyl) phthalate

    more about
    this contaminant

    Di(2-ethylhexyl) phthalate, or DEHP, is a softener added to PVC plastics. Phthalates are hormone disruptors that target the male reproductive system.

    How your levels compare

    EWG Health Guideline

    3 ppb or less

    This Utility

    0.233 ppb

    Legal Limit

    6 ppb

    National Average

    0.0266 ppb

    State Average

    0.177 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 3 ppb for di(2-ethylhexyl) phthalate 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.

    Pollution Sources

    EWG's Tap Water Database: What's in Your Drinking Water? (35)

    Industry

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

    Runoff & Sprawl

    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

    Fluoride

    THIS UTILITY0.233 ppm

    NO EWG HEALTH GUIDELINE

    LEGAL LIMIT4 ppm

    DETAILS

    X

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

    How your levels compare

    This Utility

    0.233 ppm

    Legal Limit

    4 ppm

    National Average

    0.489 ppm

    State Average

    0.396 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

    Pollution Sources

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

    Treatment Byproducts

    Filtering Options

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

    Reverse Osmosis

    Manganese

    THIS UTILITY9.00 ppb

    EWG HEALTH GUIDELINE100 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    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 ppb

    National Average

    10.1 ppb

    State Average

    51.7 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.

    Pollution Sources

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

    Industry

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

    Naturally Occurring

    Filtering Options

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

    Ion Exchange

    Monochloroacetic acid

    THIS UTILITY0.0217 ppb

    EWG HEALTH GUIDELINE53 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    Monochloroacetic acid

    more about
    this 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

    0.0217 ppb

    National Average

    0.495 ppb

    State Average

    0.859 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.

    Pollution Sources

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

    Treatment Byproducts

    Filtering Options

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

    Activated Carbon

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

    Reverse Osmosis

    Nitrate and nitrite

    THIS UTILITY0.0459 ppm

    EWG HEALTH GUIDELINE0.14 ppm

    LEGAL LIMIT10 ppm

    DETAILS

    X

    Nitrate and nitrite

    more about
    this 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

    0.0459 ppm

    Legal Limit

    10 ppm

    National Average

    0.888 ppm

    State Average

    0.392 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.

    Pollution Sources

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

    Agriculture

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

    Runoff & Sprawl

    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)

    Reverse Osmosis

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

    Ion Exchange

    Pentachlorophenol

    THIS UTILITY0.0615 ppb

    EWG HEALTH GUIDELINE0.3 ppb

    LEGAL LIMIT1 ppb

    DETAILS

    X

    Pentachlorophenol is a carcinogenic chemical used as a wood preservative. It harms developing fetuses, and causes immune suppression and hormone disruption.

    How your levels compare

    EWG Health Guideline

    0.3 ppb or less

    This Utility

    0.0615 ppb

    Legal Limit

    1 ppb

    National Average

    0.000145 ppb

    State Average

    0.00208 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 0.3 ppb for pentachlorophenol 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.

    Pollution Sources

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

    Industry

    Filtering Options

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

    Activated Carbon

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

    Reverse Osmosis

    Strontium

    THIS UTILITY0.0126 ppb

    EWG HEALTH GUIDELINE1,500 ppb

    NO LEGAL LIMIT

    DETAILS

    X

    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

    0.0126 ppb

    National Average

    3.33 ppb

    State Average

    0.133 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.

    Pollution Sources

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

    Industry

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

    Naturally Occurring

    Filtering Options

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

    Reverse Osmosis

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

    Ion Exchange

    Tribufos

    THIS UTILITY0.0667 ppb

    NO EWG HEALTH GUIDELINE

    NO LEGAL LIMIT

    DETAILS

    X

    Tribufos is an organophosphate pesticide used on cotton. Exposure to tribufos can harm the nervous system and liver, and it is classified as likely to be carcinogenic to humans.

    How your levels compare

    This Utility

    0.0667 ppb

    National Average

    ppb

    State Average

    0.000284 ppb

    NO EWG HEALTH GUIDELINE

    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

    Pollution Sources

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

    Agriculture

    Filtering Options

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

    Activated Carbon

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

    Reverse Osmosis

    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; ; 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 authori.

Other Contaminants Tested

Chemicals tested for but not detected from 2014 to 2019:

1,1,1,2-Tetrachloroethane , 1,1,1-Trichloroethane , 1,1,2,2-Tetrachloroethane , 1,1,2-Trichloroethane , 1,1-Dichloroethane , 1,1-Dichloroethylene , 1,1-Dichloropropene , 1,2,3-Trichlorobenzene , 1,2,3-Trichloropropane , 1,2,4-Trichlorobenzene , 1,2,4-Trimethylbenzene , 1,2-Dibromo-3-chloropropane (DBCP) , 1,2-Dichloroethane , 1,2-Dichloropropane , 1,3,5-Trimethylbenzene , 1,3-Butadiene , 1,3-Dichloropropane , 1,3-Dichloropropene , 1,4-Dioxane , 1-butanol , 2,2-Dichloropropane , 2,4,5-TP (Silvex) , 2,4-D , 2-methoxyethanol , 2-propen-1-ol , Alachlor (Lasso) , Aldicarb , Aldicarb sulfone , Aldicarb sulfoxide , Alpha-hexachlorocyclohexane , Antimony , Arsenic , Asbestos , Atrazine , Barium , Benzene , Benzo[a]pyrene , Beryllium , Bromobenzene , Bromochloromethane , Bromoform , Bromomethane , Butylated hydroxyanisole , Cadmium , Carbofuran , Carbon tetrachloride , Chlorate , Chlordane , Chlorodifluoromethane , Chloroethane , Chloromethane , Chlorpyriphos , Chromium (hexavalent) , Chromium (total) , cis-1,2-Dichloroethylene , Cobalt , Combined uranium , Cyanide , Dalapon , Di(2-ethylhexyl) adipate , Dibromomethane , Dichlorodifluoromethane , Dichloromethane (methylene chloride) , Dimethipin , Dinoseb , Diquat , Endothall , Endrin , Ethoprop , Ethylbenzene , Ethylene dibromide , Germanium , Glyphosate , Heptachlor , Heptachlor epoxide , Hexachlorobenzene (HCB) , Hexachlorobutadiene , Hexachlorocyclopentadiene , Isopropylbenzene , Lindane , m-Dichlorobenzene , Mercury (inorganic) , Methomyl , Methoxychlor , Molybdenum , Monobromoacetic acid , Monochlorobenzene (chlorobenzene) , n-Butylbenzene , n-Propylbenzene , Naphthalene , o-Chlorotoluene , o-Dichlorobenzene , o-toluidine , Oxamyl (Vydate) , Oxyflurofen , p-Chlorotoluene , p-Dichlorobenzene , p-Isopropyltoluene , Perfluorobutane sulfonate (PFBS) , Perfluoroheptanoic acid (PFHPA) , Perfluorohexane sulfonate (PFHXS) , Perfluorononanoic acid (PFNA) , Perfluorooctane sulfonate (PFOS) , Perfluorooctanoic acid (PFOA) , Permethrin , Picloram , Polychlorinated biphenyls (PCBs) , Profenofos , Quinoline , sec-Butylbenzene , Selenium , Silver , Simazine , Styrene , Tebuconazole , tert-Butylbenzene , Tetrachloroethylene (perchloroethylene) , Thallium , Toluene , Toxaphene , trans-1,2-Dichloroethylene , Trichloroethylene , Trichlorofluoromethane , Vanadium , Vinyl chloride , Xylenes (total)

Covington Water Supply compliance with legally mandated federal standards:

  • From April 2019 to March 2021, Covington Water Supplycomplied with health-based drinking water standards.
  • 4 QUARTERS

    in violation of any federal drinking water standard from April 2019 to March 2021

Information in this section on Covington Water Supply 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? (62)Reverse OsmosisEWG's Tap Water Database: What's in Your Drinking Water? (63)Ion ExchangeEWG's Tap Water Database: What's in Your Drinking Water? (64)
CONTAMINANTS ABOVE
HEALTH GUIDELINES
Bromodichloromethane
Chloroform
Dibromoacetic acid
Dibromochloromethane
Dichloroacetic acid
Haloacetic acids (HAA5)
Haloacetic acids (HAA9)
Radium, combined (-226 & -228)
Total trihalomethanes (TTHMs)
Trichloroacetic acid
OTHER CONTAMINANTS
DETECTED
Aluminum
Di(2-ethylhexyl) phthalate
Fluoride
Manganese
Monochloroacetic acid
Nitrate & nitrite
Pentachlorophenol
Strontium
Tribufos

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? (66)

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

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