EWG's Tap Water Database — 2021 UPDATE


Monochloroacetic acid

Dewitt WDS - North

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20140.875 ppb167ND - 2.80 ppb
20151.08 ppb166ND - 6.50 ppb
20160.506 ppb164ND - 3.70 ppb
20171.88 ppb1210ND - 3.40 ppb
20180.613 ppb164ND - 2.90 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

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.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-131Q2014 RUSSELL LND
2014-02-131Q2014 FLY RDND
2014-02-131Q2014 ALMONT DRND
2014-02-131Q2014 BADGELY RND
2014-05-132Q2014 FLY RDND
2014-05-132Q2014 RUSSELL LND
2014-05-132Q2014 ALMONT DRND
2014-05-132Q2014 BADGELY RND
2014-08-133Q2014 ALMONT DR2.80 ppb
2014-08-133Q2014 BADGELY R2.20 ppb
2014-08-133Q2014 FLY RD1.70 ppb
2014-08-133Q2014 RUSSELL L1.70 ppb
2014-11-134Q2014 RUSSELL L1.30 ppb
2014-11-134Q2014 FLY RDND
2014-11-134Q2014 BADGELY R1.50 ppb
2014-11-134Q2014 ALMONT DR2.80 ppb
2015-02-111Q2015 FLY RD1.20 ppb
2015-02-111Q2015 ALMONT DRND
2015-02-111Q2015 RUSSELL LND
2015-02-111Q2015 BADGELY RND
2015-05-142Q2015 RUSSELL LND
2015-05-142Q2015 FLY RDND
2015-05-142Q2015 ALMONT DR1.20 ppb
2015-05-142Q2015 BADGELY RND
2015-08-133Q2015 BADGELY R3.80 ppb
2015-08-133Q2015 ALMONT DR6.50 ppb
2015-08-133Q2015 RUSSELL L2.60 ppb
2015-08-133Q2015 FLY RD1.90 ppb
2015-11-094Q2015 RUSSELL LND
2015-11-094Q2015 BADGELY RND
2015-11-094Q2015 ALMONT DRND
2015-11-094Q2015 FLY RDND
2016-02-121Q2016 ALMONT DRND
2016-02-121Q2016 FLY RDND
2016-02-121Q2016 BADGELY RND
2016-02-121Q2016 RUSSELL LND
2016-05-172Q2016 RUSSELL LND
2016-05-172Q2016 ALMONT DRND
2016-05-172Q2016 FLY RDND
2016-05-172Q2016 BADGELY RND
2016-08-103Q2016 ALMONT DR3.70 ppb
2016-08-103Q2016 FLY RD1.60 ppb
2016-08-103Q2016 RUSSELL L1.10 ppb
2016-08-103Q2016 BADGELY R1.70 ppb
2016-11-084Q2016 ALMONT DRND
2016-11-084Q2016 BADGELY RND
2016-11-084Q2016 FLY RDND
2016-11-084Q2016 RUSSELL LND
2017-05-102Q2017 RUSSELL L1.70 ppb
2017-05-102Q2017 BADGELY R3.40 ppb
2017-05-102Q2017 FLY RD2.10 ppb
2017-05-102Q2017 ALMONT DR2.50 ppb
2017-08-093Q2017 FLY RD2.20 ppb
2017-08-093Q2017 RUSSELL L1.50 ppb
2017-08-093Q2017 BADGELY R3.10 ppb
2017-08-093Q2017 ALMONT DR2.40 ppb
2017-11-074Q2017 ALMONT DR2.00 ppb
2017-11-074Q2017 FLY RDND
2017-11-074Q2017 RUSSELL LND
2017-11-074Q2017 BADGELY R1.60 ppb
2018-02-151Q2018 FLY RDND
2018-02-151Q2018 RUSSELL LND
2018-02-151Q2018 BADGLEY RND
2018-02-151Q2018 ALMONT DRND
2018-05-102Q2018 BADGLEY RND
2018-05-102Q2018 FLY RDND
2018-05-102Q2018 ALMONT DRND
2018-05-102Q2018 RUSSELL LND
2018-08-143Q2018 ALMONT DR2.90 ppb
2018-08-143Q2018 FLY RD1.90 ppb
2018-08-143Q2018 BADGLEY R2.70 ppb
2018-08-143Q2018 RUSSELL L2.30 ppb
2018-11-074Q2018 BADGLEY RND
2018-11-074Q2018 FLY RDND
2018-11-074Q2018 ALMONT DRND
2018-11-074Q2018 RUSSELL LND
2019-02-141Q2019 BADGLEY RND
2019-02-141Q2019 RUSSELL LND
2019-02-141Q2019 ALMONT DRND
2019-02-141Q2019 FLY RDND
2019-05-102Q2019 BADGLEY RND
2019-05-102Q2019 ALMONT DRND
2019-05-102Q2019 FLY RDND
2019-05-102Q2019 RUSSELL LND
2019-08-133Q2019 BADGLEY RND
2019-08-133Q2019 ALMONT DRND
2019-08-133Q2019 RUSSELL LND
2019-08-133Q2019 FLY RDND
2019-11-064Q2019 BADGLEY RND
2019-11-064Q2019 FLY RDND
2019-11-064Q2019 ALMONT DRND
2019-11-064Q2019 RUSSELL LND