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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Marco Rural Water Company

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

 

92

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
2014ND160ND
20150.910 ppb121ND - 10.9 ppb
2016ND160ND
2017ND160ND
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
2014-02-242140225-3ND
2014-02-242140225-2ND
2014-02-242140225-5ND
2014-02-242140225-4ND
2014-05-212140522-2ND
2014-05-212140522-3ND
2014-05-212140522-4ND
2014-05-212140522-5ND
2014-08-182140819-24ND
2014-08-182140819-25ND
2014-08-182140819-26ND
2014-08-182140819-27ND
2014-11-252141126-4ND
2014-11-252141126-5ND
2014-11-252141126-3ND
2014-11-252141126-2ND
2015-05-282150529-2ND
2015-05-282150529-3ND
2015-05-282150529-410.9 ppb
2015-05-282150529-5ND
2015-08-242150825-2ND
2015-08-242150825-3ND
2015-08-242150825-4ND
2015-08-242150825-5ND
2015-11-232151124-2ND
2015-11-232151124-5ND
2015-11-232151124-3ND
2015-11-232151124-4ND
2016-02-222160223-02ND
2016-02-222160223-03ND
2016-02-222160223-04ND
2016-02-222160223-05ND
2016-05-252160526-2ND
2016-05-252160526-3ND
2016-05-252160526-4ND
2016-05-252160526-5ND
2016-08-222160823-02ND
2016-08-222160823-05ND
2016-08-222160823-04ND
2016-08-222160823-03ND
2016-11-222161123-03ND
2016-11-222161123-04ND
2016-11-222161123-02ND
2016-11-222161123-05ND
2017-02-212170222-05ND
2017-02-212170222-04ND
2017-02-212170222-02ND
2017-02-212170222-03ND
2017-05-222170523-02ND
2017-05-222170523-03ND
2017-05-222170523-04ND
2017-05-222170523-05ND
2017-08-242170825-41ND
2017-08-242170825-40ND
2017-08-242170825-39ND
2017-08-242170825-38ND
2017-11-302171201-02ND
2017-11-302171201-03ND
2017-11-302171201-04ND
2017-11-302171201-05ND
2018-02-202180221-15ND
2018-02-202180221-14ND
2018-02-202180221-13ND
2018-02-202180221-12ND
2018-05-232180524-05ND
2018-05-232180524-02ND
2018-05-232180524-03ND
2018-05-232180524-04ND
2018-08-232180824-17ND
2018-08-232180824-16ND
2018-11-152181116-14ND
2018-11-152181116-13ND
2018-11-202181121-02ND
2018-11-202181121-03ND
2018-11-202181121-04ND
2018-11-202181121-05ND
2019-02-282190301-16ND
2019-02-282190301-17ND
2019-02-282190301-18ND
2019-02-282190301-19ND
2019-05-212190522-02ND
2019-05-212190522-05ND
2019-05-212190522-04ND
2019-05-212190522-03ND
2019-08-192190820-03ND
2019-08-192190820-05ND
2019-08-192190820-04ND
2019-08-192190820-02ND
2019-11-182191119-21ND
2019-11-182191119-20ND
2019-11-182191119-19ND
2019-11-182191119-18ND