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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Hidden Oaks Subdivision Ws

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

 

72

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
20152.16 ppb82ND - 8.62 ppb
2016ND120ND
20171.15 ppb1610ND - 3.00 ppb
20180.200 ppb162ND - 1.60 ppb
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
2014-08-121325222ND
2014-08-121325221ND
2014-08-121325222ND
2014-08-121325221ND
2015-08-261422237ND
2015-08-261422238ND
2015-08-261422238ND
2015-08-261422237ND
2015-11-301447680ND
2015-11-3014476818.62 ppb
2015-11-3014476818.62 ppb
2015-11-301447680ND
2016-05-301496257ND
2016-05-301496258ND
2016-05-301496258ND
2016-05-301496257ND
2016-08-181518349ND
2016-08-181518350ND
2016-08-181518350ND
2016-08-181518349ND
2016-11-161542208ND
2016-11-161542209ND
2016-11-161542209ND
2016-11-161542208ND
2017-02-01352925820013.00 ppb
2017-02-01352925820022.40 ppb
2017-02-01352925820022.40 ppb
2017-02-01352925820013.00 ppb
2017-05-05353106180160.620 ppb
2017-05-0535310618015ND
2017-05-0535310618015ND
2017-05-05353106180160.620 ppb
2017-08-0235328002010ND
2017-08-0235328002009ND
2017-08-0235328002009ND
2017-08-0235328002010ND
2017-11-02353461610011.50 ppb
2017-11-02353461610021.70 ppb
2017-11-02353461610011.50 ppb
2017-11-02353461610021.70 ppb
2018-02-0235372039001ND
2018-02-0235372039002ND
2018-02-0235372039001ND
2018-02-0235372039002ND
2018-05-23353945850011.60 ppb
2018-05-2335394585002ND
2018-05-23353945850011.60 ppb
2018-05-2335394585002ND
2018-08-0235408594002ND
2018-08-0235408594001ND
2018-08-0235408594001ND
2018-08-0235408594002ND
2018-11-1635432247001ND
2018-11-1635432247002ND
2018-11-1635432247001ND
2018-11-1635432247002ND
2019-02-0135445745002ND
2019-02-0135445745001ND
2019-02-0135445745001ND
2019-02-0135445745002ND
2019-05-0135465859002ND
2019-05-0135465859002ND
2019-05-0135465859001ND
2019-05-0135465859001ND
2019-08-0135487253002ND
2019-08-0135487253001ND
2019-08-0135487253001ND
2019-08-0135487253002ND
2019-11-1435512557001ND
2019-11-1435512557002ND
2019-11-1435512557001ND
2019-11-1435512557002ND