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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Egan Water Corporation

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

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201413.0 ppb4412.0 ppb - 14.0 ppb
20150.825 ppb84ND - 2.10 ppb
20160.638 ppb164ND - 2.60 ppb
20170.0963 ppb162ND - 0.770 ppb
2018ND160ND
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
2014-07-17L0045576-0214.0 ppb
2014-07-17L0045576-0112.0 ppb
2014-07-17L0045576-0214.0 ppb
2014-07-17L0045576-0112.0 ppb
2015-07-15LA9319-1ND
2015-07-15LA9319-2ND
2015-07-15LA9319-2ND
2015-07-15LA9319-1ND
2015-10-19LA12920-12.10 ppb
2015-10-19LA12920-21.20 ppb
2015-10-19LA12920-21.20 ppb
2015-10-19LA12920-12.10 ppb
2016-01-27LA16576-1ND
2016-01-27LA16576-2ND
2016-01-27LA16576-2ND
2016-01-27LA16576-1ND
2016-04-22LA19706-1ND
2016-04-22LA19706-2ND
2016-04-22LA19706-2ND
2016-04-22LA19706-1ND
2016-07-21LA23200-1ND
2016-07-21LA23200-2ND
2016-07-21LA23200-2ND
2016-07-21LA23200-1ND
2016-10-25LA26893-22.50 ppb
2016-10-25LA26893-12.60 ppb
2016-10-25LA26893-22.50 ppb
2016-10-25LA26893-12.60 ppb
2017-01-2035290198004ND
2017-01-2035290198003ND
2017-01-2035290198003ND
2017-01-2035290198004ND
2017-04-1835307154011ND
2017-04-1835307154010ND
2017-04-1835307154010ND
2017-04-1835307154011ND
2017-07-12353241770050.770 ppb
2017-07-1235324177006ND
2017-07-1235324177006ND
2017-07-12353241770050.770 ppb
2017-10-0535340393002ND
2017-10-0535340393001ND
2017-10-0535340393001ND
2017-10-0535340393002ND
2018-01-1235368398001ND
2018-01-1235368398002ND
2018-01-1235368398001ND
2018-01-1235368398002ND
2018-04-0535384679001ND
2018-04-0535384679002ND
2018-04-0535384679001ND
2018-04-0535384679002ND
2018-07-1235404326001ND
2018-07-1235404326002ND
2018-07-1235404326001ND
2018-07-1235404326002ND
2018-10-0435422271001ND
2018-10-0435422271002ND
2018-10-0435422271001ND
2018-10-0435422271002ND
2019-01-1035441867002ND
2019-01-1035441867001ND
2019-01-1035441867001ND
2019-01-1035441867002ND
2019-04-2535464423002ND
2019-04-2535464423002ND
2019-04-2535464423001ND
2019-04-2535464423001ND
2019-07-1135481611002ND
2019-07-1135481611001ND
2019-07-1135481611001ND
2019-07-1135481611002ND
2019-10-1835506269001ND
2019-10-1835506269002ND
2019-10-1835506269001ND
2019-10-1835506269002ND