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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

LPWDN North Region

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.89 ppb3214ND - 16.0 ppb
20150.500 ppb328ND - 2.70 ppb
20160.425 ppb328ND - 2.30 ppb
2017ND320ND
2018ND320ND
2019ND320ND

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
2014-03-10L0040874-015.40 ppb
2014-03-10L0040874-0216.0 ppb
2014-03-10L0040874-0314.0 ppb
2014-03-10L0040874-043.40 ppb
2014-03-10L0040874-015.40 ppb
2014-03-10L0040874-0216.0 ppb
2014-03-10L0040874-0314.0 ppb
2014-03-10L0040874-043.40 ppb
2014-06-06L0044297-012.10 ppb
2014-06-06L0044297-02ND
2014-06-06L0044297-032.40 ppb
2014-06-06L0044297-043.00 ppb
2014-06-06L0044297-012.10 ppb
2014-06-06L0044297-02ND
2014-06-06L0044297-032.40 ppb
2014-06-06L0044297-043.00 ppb
2014-09-09L0047967-01ND
2014-09-09L0047967-02ND
2014-09-09L0047967-03ND
2014-09-09L0047967-04ND
2014-09-09L0047967-01ND
2014-09-09L0047967-02ND
2014-09-09L0047967-03ND
2014-09-09L0047967-04ND
2014-12-09L0051862-01ND
2014-12-09L0051862-02ND
2014-12-09L0051862-03ND
2014-12-09L0051862-04ND
2014-12-09L0051862-01ND
2014-12-09L0051862-02ND
2014-12-09L0051862-03ND
2014-12-09L0051862-04ND
2015-03-06LA4517-1ND
2015-03-06LA4517-2ND
2015-03-06LA4517-3ND
2015-03-06LA4517-4ND
2015-03-06LA4517-1ND
2015-03-06LA4517-2ND
2015-03-06LA4517-3ND
2015-03-06LA4517-4ND
2015-06-04LA7955-1ND
2015-06-04LA7955-22.70 ppb
2015-06-04LA7955-3ND
2015-06-04LA7955-4ND
2015-06-04LA7955-1ND
2015-06-04LA7955-22.70 ppb
2015-06-04LA7955-3ND
2015-06-04LA7955-4ND
2015-09-17LA11865-1ND
2015-09-17LA11865-2ND
2015-09-17LA11865-31.90 ppb
2015-09-17LA11865-4ND
2015-09-17LA11865-1ND
2015-09-17LA11865-2ND
2015-09-17LA11865-31.90 ppb
2015-09-17LA11865-4ND
2015-12-07LA15116-11.40 ppb
2015-12-07LA15116-2ND
2015-12-07LA15116-32.00 ppb
2015-12-07LA15116-4ND
2015-12-07LA15116-11.40 ppb
2015-12-07LA15116-2ND
2015-12-07LA15116-32.00 ppb
2015-12-07LA15116-4ND
2016-03-07LA18188-1ND
2016-03-07LA18188-2ND
2016-03-07LA18188-3ND
2016-03-07LA18188-4ND
2016-03-07LA18188-1ND
2016-03-07LA18188-2ND
2016-03-07LA18188-3ND
2016-03-07LA18188-4ND
2016-06-08LA21728-2ND
2016-06-08LA21728-3ND
2016-06-08LA21728-4ND
2016-06-08LA21728-2ND
2016-06-08LA21728-3ND
2016-06-08LA21728-4ND
2016-06-09LA21728-1ND
2016-06-09LA21728-1ND
2016-09-12LA25558-11.40 ppb
2016-09-12LA25558-21.80 ppb
2016-09-12LA25558-31.30 ppb
2016-09-12LA25558-42.30 ppb
2016-09-12LA25558-11.40 ppb
2016-09-12LA25558-21.80 ppb
2016-09-12LA25558-31.30 ppb
2016-09-12LA25558-42.30 ppb
2016-12-09LA28764-1ND
2016-12-09LA28764-2ND
2016-12-09LA28764-3ND
2016-12-09LA28764-4ND
2016-12-09LA28764-1ND
2016-12-09LA28764-2ND
2016-12-09LA28764-3ND
2016-12-09LA28764-4ND
2017-03-0235298745011ND
2017-03-0235298745012ND
2017-03-0235298745013ND
2017-03-0235298745014ND
2017-03-0235298745011ND
2017-03-0235298745012ND
2017-03-0235298745013ND
2017-03-0235298745014ND
2017-06-0835317212001ND
2017-06-0835317212002ND
2017-06-0835317212003ND
2017-06-0835317212004ND
2017-06-0835317212001ND
2017-06-0835317212002ND
2017-06-0835317212003ND
2017-06-0835317212004ND
2017-09-0835335308007ND
2017-09-0835335308008ND
2017-09-0835335308009ND
2017-09-0835335308010ND
2017-09-0835335308007ND
2017-09-0835335308008ND
2017-09-0835335308009ND
2017-09-0835335308010ND
2017-12-0135360696001ND
2017-12-0135360696002ND
2017-12-0135360696003ND
2017-12-0135360696004ND
2017-12-0135360696001ND
2017-12-0135360696002ND
2017-12-0135360696003ND
2017-12-0135360696004ND
2018-03-0935379278001ND
2018-03-0935379278002ND
2018-03-0935379278003ND
2018-03-0935379278004ND
2018-03-0935379278001ND
2018-03-0935379278002ND
2018-03-0935379278003ND
2018-03-0935379278004ND
2018-06-1535398716001ND
2018-06-1535398716002ND
2018-06-1535398716003ND
2018-06-1535398716004ND
2018-06-1535398716001ND
2018-06-1535398716002ND
2018-06-1535398716003ND
2018-06-1535398716004ND
2018-09-1235418015001ND
2018-09-1235418015002ND
2018-09-1235418015003ND
2018-09-1235418015004ND
2018-09-1235418015001ND
2018-09-1235418015002ND
2018-09-1235418015003ND
2018-09-1235418015004ND
2018-12-1335437382001ND
2018-12-1335437382002ND
2018-12-1335437382003ND
2018-12-1335437382004ND
2018-12-1335437382001ND
2018-12-1335437382002ND
2018-12-1335437382003ND
2018-12-1335437382004ND
2019-03-1435454620001ND
2019-03-1435454620002ND
2019-03-1435454620003ND
2019-03-1435454620004ND
2019-03-1435454620001ND
2019-03-1435454620002ND
2019-03-1435454620003ND
2019-03-1435454620004ND
2019-06-1435475666001ND
2019-06-1435475666002ND
2019-06-1435475666003ND
2019-06-1435475666004ND
2019-06-1435475666001ND
2019-06-1435475666002ND
2019-06-1435475666003ND
2019-06-1435475666004ND
2019-09-1235497788001ND
2019-09-1235497788002ND
2019-09-1235497788003ND
2019-09-1235497788004ND
2019-09-1235497788001ND
2019-09-1235497788002ND
2019-09-1235497788003ND
2019-09-1235497788004ND
2019-12-1235518909001ND
2019-12-1235518909002ND
2019-12-1235518909003ND
2019-12-1235518909004ND
2019-12-1235518909001ND
2019-12-1235518909002ND
2019-12-1235518909003ND
2019-12-1235518909004ND