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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Lagrange

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.999 ppb165ND - 3.92 ppb
20170.335 ppb163ND - 2.37 ppb
20182.07 ppb1610ND - 6.62 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
2014-03-10AI29481ND
2014-03-10AI29480ND
2014-03-10AI29479ND
2014-03-10AI29478ND
2014-06-10AI42812ND
2014-06-10AI42811ND
2014-06-10AI42810ND
2014-06-10AI42809ND
2014-09-08AI52744ND
2014-09-08AI52743ND
2014-09-08AI52745ND
2014-09-08AI52746ND
2014-12-09AI61047ND
2014-12-09AI61046ND
2014-12-09AI61045ND
2014-12-09AI61044ND
2015-03-30AI69831ND
2015-03-30AI69830ND
2015-03-30AI69829ND
2015-03-30AI69828ND
2015-06-09AI79310ND
2015-06-09AI79311ND
2015-06-09AI79313ND
2015-06-09AI79312ND
2015-09-09AI89264ND
2015-09-09AI89263ND
2015-09-09AI89262ND
2015-09-09AI89261ND
2015-12-09AJ02449ND
2015-12-09AJ02448ND
2015-12-09AJ02447ND
2015-12-09AJ02446ND
2016-03-08AJ07854ND
2016-03-08AJ07853ND
2016-03-08AJ07855ND
2016-03-08AJ07856ND
2016-06-07AJ13640ND
2016-06-07AJ13639ND
2016-06-07AJ13638ND
2016-06-07AJ13637ND
2016-08-08159444-04ND
2016-08-08159444-033.52 ppb
2016-08-08159444-02ND
2016-08-08159444-012.95 ppb
2016-11-08162912-013.43 ppb
2016-11-08162912-042.17 ppb
2016-11-08162912-033.92 ppb
2016-11-08162912-02ND
2017-03-14166199-04ND
2017-03-14166199-03ND
2017-03-14166199-02ND
2017-03-14166199-01ND
2017-05-09166941-04ND
2017-05-09166941-031.18 ppb
2017-05-09166941-02ND
2017-05-09166941-01ND
2017-08-08169368-02ND
2017-08-08169368-01ND
2017-08-08169368-032.37 ppb
2017-08-08169368-04ND
2017-11-13172242-04ND
2017-11-13172242-031.81 ppb
2017-11-13172242-02ND
2017-11-13172242-01ND
2018-02-20174854-042.94 ppb
2018-02-20174854-031.96 ppb
2018-02-20174854-023.20 ppb
2018-02-20174854-011.45 ppb
2018-05-08177346-014.25 ppb
2018-05-08177346-026.62 ppb
2018-05-08177346-044.05 ppb
2018-05-08177346-036.08 ppb
2018-07-09180142-04ND
2018-07-09180142-031.21 ppb
2018-07-09180142-02ND
2018-07-09180142-011.40 ppb
2018-11-13183138-04ND
2018-11-13183138-03ND
2018-11-13183138-02ND
2018-11-13183138-01ND
2019-02-11185927-02ND
2019-02-11185927-01ND
2019-02-11185927-03ND
2019-02-11185927-04ND
2019-05-13188747-04ND
2019-05-13188747-03ND
2019-05-13188747-02ND
2019-05-13188747-01ND
2019-08-12191940-04ND
2019-08-12191940-03ND
2019-08-12191940-02ND
2019-08-12191940-01ND
2019-11-11195620-01ND
2019-11-11195620-04ND
2019-11-11195620-03ND
2019-11-11195620-02ND