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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

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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
2013N/A00N/A
2014ND150ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND400ND
2019ND360ND

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
2014-01-22LLF07798ND
2014-01-22LLF07800ND
2014-01-22LLF07799ND
2014-01-22LLF07797ND
2014-04-01LLF13593ND
2014-04-01LLF13595ND
2014-04-01LLF13592ND
2014-04-01LLF13594ND
2014-07-15LLF27875ND
2014-07-15LLF27874ND
2014-07-15LLF27877ND
2014-11-12LLF46436ND
2014-11-12LLF46433ND
2014-11-12LLF46435ND
2014-11-12LLF46434ND
2018-01-09LLH60556ND
2018-01-09LLH60558ND
2018-01-09LLH60559ND
2018-01-09LLH60561ND
2018-01-09LLH60562ND
2018-01-09LLH60563ND
2018-01-09LLH60560ND
2018-01-09LLH60555ND
2018-01-09LLH60557ND
2018-01-10LLH60796ND
2018-01-10LLH60799ND
2018-01-10LLH60800ND
2018-01-10LLH60797ND
2018-04-02LLH73801ND
2018-04-02LLH73804ND
2018-04-02LLH73802ND
2018-04-02LLH73803ND
2018-04-02LLH73805ND
2018-04-02LLH73800ND
2018-04-02LLH73807ND
2018-04-02LLH73808ND
2018-04-02LLH73806ND
2018-07-02LLH90966ND
2018-07-02LLH90967ND
2018-07-02LLH90965ND
2018-07-02LLH90963ND
2018-07-02LLH90961ND
2018-07-02LLH90962ND
2018-07-02LLH90960ND
2018-07-02LLH90959ND
2018-07-02LLH90964ND
2018-10-01LLI09596ND
2018-10-01LLI09599ND
2018-10-01LLI09598ND
2018-10-01LLI09591ND
2018-10-01LLI09592ND
2018-10-01LLI09594ND
2018-10-01LLI09595ND
2018-10-01LLI09593ND
2018-10-01LLI09597ND
2019-01-08LLI21786ND
2019-01-08LLI21785ND
2019-01-08LLI21784ND
2019-01-08LLI21782ND
2019-01-08LLI21780ND
2019-01-08LLI21787ND
2019-01-08LLI21781ND
2019-01-08LLI21779ND
2019-01-08LLI21783ND
2019-04-01LLI31437ND
2019-04-01LLI31442ND
2019-04-01LLI31439ND
2019-04-01LLI31440ND
2019-04-01LLI31438ND
2019-04-01LLI31441ND
2019-04-01LLI31443ND
2019-04-01LLI31436ND
2019-04-01LLI31444ND
2019-07-01LLI47636ND
2019-07-01LLI47633ND
2019-07-01LLI47638ND
2019-07-01LLI47630ND
2019-07-01LLI47635ND
2019-07-01LLI47632ND
2019-07-01LLI47634ND
2019-07-01LLI47631ND
2019-07-01LLI47637ND
2019-10-01LLI68714ND
2019-10-01LLI68707ND
2019-10-01LLI68715ND
2019-10-01LLI68713ND
2019-10-01LLI68712ND
2019-10-01LLI68711ND
2019-10-01LLI68710ND
2019-10-01LLI68709ND
2019-10-01LLI68708ND