EWG's Tap Water Database — 2021 UPDATE


Haloacetic acids (HAA5)

Dewitt WDS - North

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. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
201417.3 ppb161613.2 ppb - 23.0 ppb
201514.8 ppb15159.00 ppb - 22.0 ppb
201613.5 ppb16167.70 ppb - 19.0 ppb
201718.9 ppb121210.00 ppb - 33.0 ppb
201816.1 ppb16168.50 ppb - 22.0 ppb
201913.4 ppb16167.90 ppb - 18.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

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.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-131Q2014 BADGELY R14.0 ppb
2014-02-131Q2014 ALMONT DR18.2 ppb
2014-02-131Q2014 RUSSELL L13.2 ppb
2014-02-131Q2014 FLY RD19.9 ppb
2014-05-132Q2014 ALMONT DR23.0 ppb
2014-05-132Q2014 FLY RD14.1 ppb
2014-05-132Q2014 RUSSELL L15.9 ppb
2014-05-132Q2014 BADGELY R21.0 ppb
2014-08-133Q2014 FLY RD15.9 ppb
2014-08-133Q2014 ALMONT DR18.0 ppb
2014-08-133Q2014 BADGELY R17.0 ppb
2014-08-133Q2014 RUSSELL L21.0 ppb
2014-11-134Q2014 ALMONT DR17.3 ppb
2014-11-134Q2014 RUSSELL L15.8 ppb
2014-11-134Q2014 FLY RD14.0 ppb
2014-11-134Q2014 BADGELY R19.0 ppb
2015-02-111Q2015 RUSSELL L9.00 ppb
2015-02-111Q2015 BADGELY R19.0 ppb
2015-02-111Q2015 ALMONT DR10.7 ppb
2015-02-111Q2015 FLY RD16.0 ppb
2015-05-142Q2015 FLY RD12.0 ppb
2015-05-142Q2015 RUSSELL L13.9 ppb
2015-05-142Q2015 BADGELY R16.0 ppb
2015-05-142Q2015 ALMONT DR16.4 ppb
2015-08-133Q2015 BADGELY R16.4 ppb
2015-08-133Q2015 RUSSELL L19.0 ppb
2015-08-133Q2015 ALMONT DR15.7 ppb
2015-11-094Q2015 RUSSELL L12.5 ppb
2015-11-094Q2015 FLY RD12.4 ppb
2015-11-094Q2015 BADGELY R22.0 ppb
2015-11-094Q2015 ALMONT DR11.4 ppb
2016-02-121Q2016 ALMONT DR10.5 ppb
2016-02-121Q2016 FLY RD9.30 ppb
2016-02-121Q2016 RUSSELL L11.0 ppb
2016-02-121Q2016 BADGELY R19.0 ppb
2016-05-172Q2016 FLY RD10.00 ppb
2016-05-172Q2016 ALMONT DR7.70 ppb
2016-05-172Q2016 BADGELY R16.0 ppb
2016-05-172Q2016 RUSSELL L11.5 ppb
2016-08-103Q2016 ALMONT DR11.8 ppb
2016-08-103Q2016 FLY RD18.0 ppb
2016-08-103Q2016 RUSSELL L11.0 ppb
2016-08-103Q2016 BADGELY R17.0 ppb
2016-11-084Q2016 FLY RD16.6 ppb
2016-11-084Q2016 BADGELY R18.0 ppb
2016-11-084Q2016 ALMONT DR10.1 ppb
2016-11-084Q2016 RUSSELL L19.0 ppb
2017-05-102Q2017 BADGELY R33.0 ppb
2017-05-102Q2017 FLY RD20.0 ppb
2017-05-102Q2017 ALMONT DR24.0 ppb
2017-05-102Q2017 RUSSELL L21.0 ppb
2017-08-093Q2017 ALMONT DR17.0 ppb
2017-08-093Q2017 BADGELY R26.0 ppb
2017-08-093Q2017 FLY RD18.0 ppb
2017-08-093Q2017 RUSSELL L16.8 ppb
2017-11-074Q2017 ALMONT DR10.00 ppb
2017-11-074Q2017 FLY RD11.4 ppb
2017-11-074Q2017 BADGELY R17.0 ppb
2017-11-074Q2017 RUSSELL L12.0 ppb
2018-02-151Q2018 BADGLEY R21.0 ppb
2018-02-151Q2018 RUSSELL L17.5 ppb
2018-02-151Q2018 FLY RD12.8 ppb
2018-02-151Q2018 ALMONT DR15.0 ppb
2018-05-102Q2018 RUSSELL L15.0 ppb
2018-05-102Q2018 ALMONT DR16.4 ppb
2018-05-102Q2018 FLY RD19.0 ppb
2018-05-102Q2018 BADGLEY R18.1 ppb
2018-08-143Q2018 ALMONT DR15.2 ppb
2018-08-143Q2018 RUSSELL L22.0 ppb
2018-08-143Q2018 FLY RD20.0 ppb
2018-08-143Q2018 BADGLEY R19.0 ppb
2018-11-074Q2018 ALMONT DR8.50 ppb
2018-11-074Q2018 BADGLEY R12.0 ppb
2018-11-074Q2018 RUSSELL L10.6 ppb
2018-11-074Q2018 FLY RD15.0 ppb
2019-02-141Q2019 RUSSELL L12.4 ppb
2019-02-141Q2019 BADGLEY R11.7 ppb
2019-02-141Q2019 FLY RD18.0 ppb
2019-02-141Q2019 ALMONT DR13.7 ppb
2019-05-102Q2019 RUSSELL L10.1 ppb
2019-05-102Q2019 FLY RD11.9 ppb
2019-05-102Q2019 ALMONT DR12.6 ppb
2019-05-102Q2019 BADGLEY R14.4 ppb
2019-08-133Q2019 RUSSELL L14.3 ppb
2019-08-133Q2019 ALMONT DR7.90 ppb
2019-08-133Q2019 FLY RD17.0 ppb
2019-08-133Q2019 BADGLEY R14.7 ppb
2019-11-064Q2019 BADGLEY R16.7 ppb
2019-11-064Q2019 ALMONT DR9.20 ppb
2019-11-064Q2019 FLY RD15.1 ppb
2019-11-064Q2019 RUSSELL L14.2 ppb