Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochloroacetic acid

Hecla Water Association-Plant PWS

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.

 

102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND200ND
20130.281 ppb162ND - 2.40 ppb
2014ND160ND
2015ND160ND
2016ND160ND
20170.121 ppb181ND - 2.18 ppb

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
2012-03-079900121183ND
2012-03-079900121179ND
2012-03-079900121180ND
2012-03-079900121181ND
2012-03-079900121182ND
2012-06-069900024815ND
2012-06-069900029173ND
2012-06-069900029174ND
2012-06-069900029175ND
2012-06-069900029176ND
2012-09-199900060574ND
2012-09-199900060576ND
2012-09-199900060577ND
2012-09-199900060578ND
2012-09-199900060575ND
2012-12-069900074379ND
2012-12-069900074381ND
2012-12-069900074382ND
2012-12-069900074383ND
2012-12-069900083513ND
2013-02-139900085510ND
2013-02-139900085511ND
2013-02-139900085512ND
2013-02-139900085513ND
2013-05-139900108046ND
2013-05-149900108045ND
2013-05-149900108047ND
2013-05-149900108048ND
2013-09-04A1301369342.10 ppb
2013-09-04A130136935ND
2013-09-04A1301369362.40 ppb
2013-09-04A130136937ND
2013-11-14A130161728ND
2013-11-14A130161729ND
2013-11-14A130161730ND
2013-11-14A130161731ND
2014-02-11A140180017ND
2014-02-11A140180018ND
2014-02-11A140180019ND
2014-02-11A140180020ND
2014-05-13A140191214ND
2014-05-13A140191215ND
2014-05-13A140191216ND
2014-05-13A140191217ND
2014-08-10A140216593ND
2014-08-10A140216594ND
2014-08-10A140216596ND
2014-08-14A140216865ND
2014-11-11A140217521ND
2014-11-11A140217522ND
2014-11-11A140217523ND
2014-11-11A140217524ND
2015-02-10A150231757ND
2015-02-10A150231758ND
2015-02-10A150231759ND
2015-02-10A150231760ND
2015-05-12A150285508ND
2015-05-12A150285509ND
2015-05-12A150285510ND
2015-05-12A150285511ND
2015-08-11A150319994ND
2015-08-11A150319995ND
2015-08-11A150319996ND
2015-08-11A150319997ND
2015-11-10A150331836ND
2015-11-10A150331837ND
2015-11-10A150331838ND
2015-11-10A150331839ND
2016-02-09A160338264ND
2016-02-09A160338265ND
2016-02-09A160338374ND
2016-02-09A160338375ND
2016-05-10A160375052ND
2016-05-10A160375053ND
2016-05-10A160375054ND
2016-05-10A160375055ND
2016-08-09A160427303ND
2016-08-09A160427304ND
2016-08-09A160427305ND
2016-08-09A160427306ND
2016-11-22A160463167ND
2016-11-22A160463168ND
2016-11-22A160463169ND
2016-11-22A160463170ND
2017-02-08A170474766ND
2017-02-08A170474767ND
2017-02-08A170474768ND
2017-02-08A170474769ND
2017-05-09A170498069ND
2017-05-09A170498070ND
2017-05-09A170498071ND
2017-05-09A170498072ND
2017-06-13A170504664ND
2017-06-13A170504665ND
2017-08-08A1705166212.18 ppb
2017-08-08A170516622ND
2017-08-08A170516869ND
2017-08-08A170516870ND
2017-11-07A170548244ND
2017-11-07A170548245ND
2017-11-07A170548246ND
2017-11-07A170548247ND