Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Clear Brook City MUD

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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20151.22 ppb164ND - 6.90 ppb
20161.47 ppb166ND - 5.10 ppb
2017ND160ND
20181.59 ppb167ND - 4.80 ppb
20191.33 ppb165ND - 10.00 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
2014-02-27AC45021ND
2014-02-27AC45037ND
2014-02-27AC45022ND
2014-02-27AC45024ND
2014-05-21AC54975ND
2014-05-21AC54941ND
2014-05-21AC54940ND
2014-05-21AC54956ND
2014-09-29AC68463ND
2014-09-29AC68484ND
2014-09-29AC68462ND
2014-09-29AC68481ND
2014-11-20AC72677ND
2014-11-20AC72648ND
2014-11-20AC72646ND
2014-11-20AC72645ND
2015-02-18AC80912ND
2015-02-18AC80935ND
2015-02-18AC80911ND
2015-02-18AC80933ND
2015-05-20AC92765ND
2015-05-20AC927662.30 ppb
2015-05-20AC92767ND
2015-05-20AC92764ND
2015-07-17AD00087ND
2015-07-17AD001375.00 ppb
2015-07-17AD001266.90 ppb
2015-07-17AD00128ND
2015-11-20AD14410ND
2015-11-20AD14418ND
2015-11-20AD144015.30 ppb
2015-11-20AD14402ND
2016-01-22AD196554.30 ppb
2016-01-22AD19651ND
2016-01-22AD196203.60 ppb
2016-01-22AD19624ND
2016-04-06AD32042ND
2016-04-06AD320323.10 ppb
2016-04-06AD32018ND
2016-04-06AD320353.30 ppb
2016-07-11AD43554ND
2016-07-11AD435204.10 ppb
2016-07-11AD435575.10 ppb
2016-07-11AD43518ND
2016-10-28AD55274ND
2016-10-28AD55277ND
2016-10-28AD55276ND
2016-10-28AD55275ND
2017-01-06AD63533ND
2017-01-06AD63531ND
2017-01-06AD63528ND
2017-01-06AD63529ND
2017-04-10AD78936ND
2017-04-10AD78938ND
2017-04-10AD78937ND
2017-04-10AD78935ND
2017-07-14AD89438ND
2017-07-14AD89435ND
2017-07-14AD89437ND
2017-07-14AD89439ND
2017-10-17AE01072ND
2017-10-17AE01063ND
2017-10-17AE01062ND
2017-10-17AE01061ND
2018-02-23AE153494.60 ppb
2018-02-23AE153504.60 ppb
2018-02-23AE153514.80 ppb
2018-02-23AE153524.20 ppb
2018-05-24AE27659ND
2018-05-24AE27658ND
2018-05-24AE27690ND
2018-05-24AE27657ND
2018-08-09AE36299ND
2018-08-09AE36265ND
2018-08-09AE36286ND
2018-08-09AE36277ND
2018-11-13AE459082.90 ppb
2018-11-13AE459102.10 ppb
2018-11-13AE459112.30 ppb
2018-11-13AE45906ND
2019-01-29AE518852.50 ppb
2019-01-29AE51877ND
2019-01-29AE51878ND
2019-01-29AE518792.70 ppb
2019-04-04AE61200ND
2019-04-04AE611933.50 ppb
2019-04-04AE61197ND
2019-04-04AE61199ND
2019-07-18AE75013ND
2019-07-18AE75014ND
2019-07-18AE749782.60 ppb
2019-07-18AE74999ND
2019-10-17AE86888ND
2019-10-17AE8689110.00 ppb
2019-10-17AE86889ND
2019-10-17AE86890ND