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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Bear Valley Joint Authority

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

 

91

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND150ND
2019ND160ND

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
2014-04-0814041219-001ND
2014-04-0814041219-002ND
2014-04-0814041219-004ND
2014-04-0814041219-003ND
2014-07-0814071184-001ND
2014-07-0814071184-002ND
2014-07-0814071184-003ND
2014-07-0814071184-004ND
2014-10-0714101404-004ND
2014-10-0714101404-001ND
2014-10-0714101404-003ND
2014-10-0714101404-002ND
2015-01-1212371178ND
2015-01-1212371167ND
2015-01-1212371145ND
2015-01-1212371156ND
2015-04-0712717937ND
2015-04-0712717943ND
2015-04-0712717921ND
2015-04-0712717924ND
2015-09-3013357755ND
2015-09-3013357764ND
2015-09-3013357770ND
2015-09-3013357740ND
2015-10-0713479886ND
2015-10-0713479872ND
2015-10-0713479893ND
2015-10-0713479866ND
2016-01-1213839175ND
2016-01-1213839193ND
2016-01-1213839181ND
2016-01-1213839202ND
2016-04-1214211973ND
2016-04-1214211947ND
2016-04-1214211982ND
2016-04-1214211960ND
2016-07-1214694611ND
2016-07-1214694624ND
2016-07-1214694641ND
2016-07-1214694618ND
2016-10-1115189914ND
2016-10-1115189935ND
2016-10-1115189927ND
2016-10-1115189943ND
2017-01-1015620574ND
2017-01-1015620593ND
2017-01-1015620580ND
2017-01-1015620568ND
2017-04-1116053040ND
2017-04-1116053051ND
2017-04-1116053035ND
2017-04-1116053064ND
2017-07-1116526543ND
2017-07-1116526534ND
2017-07-1116526519ND
2017-07-1116526547ND
2017-10-1016987518ND
2017-10-1016987515ND
2017-10-1016987503ND
2017-10-1016987492ND
2018-01-09(714) SP 714ND
2018-01-09(713) SP 713ND
2018-01-09(712) SP 712ND
2018-01-09(711) SP 711ND
2018-04-10(711) SP 711ND
2018-04-10(714) SP 714ND
2018-04-10(713) SP 713ND
2018-04-10(712) SP 712ND
2018-07-10(713) SP 713ND
2018-07-10(711) SP 711ND
2018-07-10(712) SP 712ND
2018-07-10(714) SP 714ND
2018-10-09(712) SP 712ND
2018-10-09(714) SP 714ND
2018-10-09(713) SP 713ND
2019-01-08(712) SP 712ND
2019-01-08(714) SP 714ND
2019-01-08(711) SP 711ND
2019-01-08(713) SP 713ND
2019-04-09(714) SP 714ND
2019-04-09(713) SP 713ND
2019-04-09(711) SP 711ND
2019-04-09(712) SP 712ND
2019-07-09(713) SP 713ND
2019-07-09(711) SP 711ND
2019-07-09(714) SP 714ND
2019-07-09(712) SP 712ND
2019-10-08(714) SP 714ND
2019-10-08(713) SP 713ND
2019-10-08(712) SP 712ND
2019-10-08(711) SP 711ND