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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

California Water Service Co-leona Valley

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND80ND
20140.288 ppb81ND - 2.30 ppb
2015ND80ND
2016ND80ND
2017ND80ND

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
2012-11-075810-801-1205ND
2012-11-075810-800-1220ND
2013-02-125810-801-1342ND
2013-02-125810-800-1353ND
2013-05-145810-801-1320ND
2013-05-145810-800-1333ND
2013-08-155810-801-1132ND
2013-08-155810-800-1142ND
2013-11-125810-801-1203ND
2013-11-125810-800-1156ND
2014-02-115810-801-1049ND
2014-02-115810-800-1055ND
2014-05-135810-801-1318ND
2014-05-135810-800-1326ND
2014-08-125810-801-10312.30 ppb
2014-08-125810-800-1016ND
2014-11-255810-800-1337ND
2014-11-255810-801-1330ND
2015-02-105810-801-1430ND
2015-02-105810-800-1434ND
2015-05-135810-800-1145ND
2015-05-135810-801-1136ND
2015-08-185810-800-0940ND
2015-08-185810-801-1018ND
2015-11-095810-801-1325ND
2015-11-095810-800-1343ND
2016-02-095810-801-1200ND
2016-02-095810-800-1144ND
2016-05-105810-801-1057ND
2016-05-105810-800-1103ND
2016-08-095810-801-0923ND
2016-08-095810-800-0937ND
2016-11-155810-801-1257ND
2016-11-155810-800-1317ND
2017-02-145810-801-1422ND
2017-02-145810-800-1438ND
2017-05-095810-801-1034ND
2017-05-095810-800-1054ND
2017-08-085810-800-1116ND
2017-08-085810-801-1057ND
2017-11-135810-800-1354ND
2017-11-135810-801-1413ND