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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Hawthorne Water Department

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

 

95

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND150ND

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
2014-02-125810-802-1245ND
2014-02-125810-800-1210ND
2014-02-125810-801-1220ND
2014-02-125810-803-1200ND
2014-05-135810-803-1135ND
2014-05-135810-802-1150ND
2014-05-135810-801-1125ND
2014-05-135810-800-1120ND
2014-08-125810-803-0910ND
2014-08-125810-802-1100ND
2014-08-125810-801-0930ND
2014-08-125810-800-0920ND
2014-11-125810-802-0935ND
2014-11-125810-801-0845ND
2014-11-125810-803-0950ND
2014-11-125810-800-0830ND
2015-02-115810-803-0912ND
2015-02-115810-802-0900ND
2015-02-115810-801-0822ND
2015-02-115810-800-0810ND
2015-05-135810-803-0930ND
2015-05-135810-802-0920ND
2015-05-135810-800-0820ND
2015-05-135810-801-0830ND
2015-08-125810-800-1110ND
2015-08-125810-803-1135ND
2015-08-125810-802-1147ND
2015-08-125810-801-1121ND
2015-11-095810-801-0915ND
2015-11-095810-800-0900ND
2015-11-095810-803-0930ND
2015-11-095810-802-0945ND
2016-02-095810-801-0850ND
2016-02-095810-800-0835ND
2016-02-095810-803-0903ND
2016-02-095810-802-0915ND
2016-05-105810-803-0938ND
2016-05-105810-801-0908ND
2016-05-105810-800-0845ND
2016-05-105810-802-0924ND
2016-08-115810-801-0954ND
2016-08-115810-802-1013ND
2016-08-115810-803-0930ND
2016-08-115810-800-0940ND
2016-11-145810-803-1100ND
2016-11-145810-801-1030ND
2016-11-145810-802-1045ND
2016-11-145810-800-1020ND
2017-02-175810-803-1559ND
2017-02-175810-802-1541ND
2017-02-175810-801-1524ND
2017-02-175810-800-1515ND
2017-05-095810-800-0827ND
2017-05-095810-803-0916ND
2017-05-095810-801-0840ND
2017-05-095810-802-0855ND
2017-08-155810-800-0921ND
2017-08-155810-803-1440ND
2017-08-155810-801-0934ND
2017-08-155810-802-1139ND
2017-11-145810-803-0915ND
2017-11-145810-800-0940ND
2017-11-145810-802-1235ND
2017-11-145810-801-0955ND
2018-02-135810-802-1331ND
2018-02-135810-803-1445ND
2018-02-135810-801-1018ND
2018-02-135810-800-0954ND
2018-05-155810-800-1000ND
2018-05-155810-801-1015ND
2018-05-155810-802-1150ND
2018-05-155810-803-0945ND
2018-08-145810-800-0955ND
2018-08-145810-801-1010ND
2018-08-145810-803-0945ND
2018-08-145810-802-1155ND
2018-11-145810-803-0950ND
2018-11-145810-801-1020ND
2018-11-145810-802-1115ND
2018-11-145810-800-1010ND
2019-02-135810-800-0838ND
2019-02-135810-801-0858ND
2019-02-135810-802-1000ND
2019-05-145810-801-1112ND
2019-05-145810-802-1356ND
2019-05-145810-800-1045ND
2019-05-145810-803-1025ND
2019-08-145810-802-1220ND
2019-08-145810-800-1112ND
2019-08-145810-801-1128ND
2019-08-145810-803-1055ND
2019-11-135810-802-1055ND
2019-11-135810-800-0950ND
2019-11-135810-803-0935ND
2019-11-135810-801-1000ND