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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

San Gabriel County WD

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.

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND160ND
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND

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
2012-04-239588-803-1250ND
2012-04-239588-801-1230ND
2012-04-239588-802-1210ND
2012-04-239588-800-1145ND
2012-07-269588-800-0855ND
2012-07-269588-803-1155ND
2012-07-269588-802-1120ND
2012-07-269588-801-1135ND
2012-10-239588-803-1255ND
2012-10-239588-800-0945ND
2012-10-239588-801-1315ND
2012-10-239588-802-1350ND
2013-01-239588-801-1230ND
2013-01-239588-802-1250ND
2013-01-239588-803-1105ND
2013-01-239588-800-1300ND
2013-04-239588-803-1100ND
2013-04-239588-800-0910ND
2013-04-239588-801-1230ND
2013-04-239588-802-0905ND
2013-07-249588-802-1430ND
2013-07-249588-800-1445ND
2013-07-249588-803-1400ND
2013-07-249588-801-1415ND
2013-10-239588-802-0840ND
2013-10-239588-801-1245ND
2013-10-239588-800-0850ND
2013-10-239588-803-1155ND
2014-01-239588-801-1300ND
2014-01-239588-800-0900ND
2014-01-239588-803-1225ND
2014-01-239588-802-0845ND
2014-04-229588-802-0830ND
2014-04-229588-800-0840ND
2014-04-229588-803-1045ND
2014-04-229588-801-1200ND
2014-07-239588-802-0830ND
2014-07-239588-800-0820ND
2014-07-239588-801-0845ND
2014-07-239588-803-0905ND
2014-10-239588-800-0905ND
2014-10-239588-801-1215ND
2014-10-239588-802-0850ND
2014-10-239588-803-1200ND
2015-01-239588-801-1205ND
2015-01-239588-800-0830ND
2015-01-239588-803-1130ND
2015-01-239588-802-0820ND
2015-04-229588-800-0830ND
2015-04-229588-801-1135ND
2015-04-229588-802-0815ND
2015-04-229588-803-1120ND
2015-07-239588-802-0820ND
2015-07-239588-803-1140ND
2015-07-239588-801-1205ND
2015-07-239588-800-0835ND
2015-10-269588-801-1150ND
2015-10-269588-802-0820ND
2015-10-269588-800-0830ND
2015-10-269588-803-1135ND
2016-01-269588-802-0840ND
2016-01-269588-801-1210ND
2016-01-269588-800-0850ND
2016-01-269588-803-1155ND
2016-04-229588-800-0840ND
2016-04-229588-802-0820ND
2016-04-229588-803-1135ND
2016-04-229588-801-1210ND
2016-07-269588-803-1110ND
2016-07-269588-801-1125ND
2016-07-269588-800-0835ND
2016-07-269588-802-0825ND
2016-10-269588-801-1205ND
2016-10-269588-802-0845ND
2016-10-269588-803-1150ND
2016-10-269588-800-0900ND
2017-01-249588-800-0850ND
2017-01-249588-801-1210ND
2017-01-249588-803-1150ND
2017-01-249588-802-0835ND
2017-04-249588-800-1355ND
2017-04-249588-802-1345ND
2017-04-249588-803-1315ND
2017-04-249588-801-1330ND
2017-07-279588-801-1330ND
2017-07-279588-803-1315ND
2017-07-279588-802-1345ND
2017-07-279588-800-1405ND
2017-10-249588-802-0830ND
2017-10-249588-803-1145ND
2017-10-249588-801-1210ND
2017-10-249588-800-0840ND