Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

University of New Mexico

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

 

71

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
20150.0943 ppb71ND - 0.660 ppb
2016ND160ND
20170.826 ppb165ND - 5.40 ppb
2018ND120ND
20190.281 ppb163ND - 1.60 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
2014-01-172014001714ND
2014-04-152014012256ND
2014-07-152014022282ND
2014-10-162014032609ND
2015-01-132015001371ND
2015-04-132015011311ND
2015-07-1320150200120.660 ppb
2015-10-132015030756ND
2015-10-132015030757ND
2015-10-132015030755ND
2015-10-132015030758ND
2016-01-112016000872ND
2016-01-112016000873ND
2016-01-112016000874ND
2016-01-112016000871ND
2016-04-192016011059ND
2016-04-192016011060ND
2016-04-192016011057ND
2016-04-192016011058ND
2016-07-132016020057ND
2016-07-132016020058ND
2016-07-132016020055ND
2016-07-132016020056ND
2016-10-172016030076ND
2016-10-172016030075ND
2016-10-172016030074ND
2016-10-172016030073ND
2017-01-1020170007335.40 ppb
2017-01-1020170007351.70 ppb
2017-01-1020170007362.60 ppb
2017-01-1020170007342.70 ppb
2017-04-052017009778ND
2017-04-052017009776ND
2017-04-052017009777ND
2017-04-052017009779ND
2017-07-112017019664ND
2017-07-112017019661ND
2017-07-112017019662ND
2017-07-112017019663ND
2017-10-1020170291440.810 ppb
2017-10-102017029143ND
2017-10-102017029146ND
2017-10-102017029145ND
2018-04-042018009641ND
2018-04-042018009640ND
2018-04-042018009639ND
2018-04-042018009638ND
2018-07-092018018568ND
2018-07-092018018565ND
2018-07-092018018566ND
2018-07-092018018567ND
2018-10-012018028078ND
2018-10-012018028079ND
2018-10-012018028080ND
2018-10-012018028081ND
2019-01-102019000766ND
2019-01-102019000767ND
2019-01-102019000768ND
2019-01-102019000769ND
2019-04-042019008474ND
2019-04-042019008475ND
2019-04-042019008476ND
2019-04-042019008477ND
2019-07-0220190181021.30 ppb
2019-07-0220190181041.60 ppb
2019-07-0220190181031.60 ppb
2019-07-022019018101ND
2019-10-022019028147ND
2019-10-022019028146ND
2019-10-022019028145ND
2019-10-022019028144ND