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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Paint Rock

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
20184.15 ppb43ND - 9.90 ppb
20191.80 ppb42ND - 4.70 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
2014-02-19AC43696ND
2014-04-22AC51367ND
2014-09-16AC67333ND
2014-11-18AC72452ND
2015-02-11AC80176ND
2015-06-01AC93953ND
2015-08-11AD03601ND
2015-11-03AD12371ND
2016-02-16AD23615ND
2016-05-18AD37243ND
2016-07-21AD45212ND
2016-11-30AD59818ND
2017-03-01Q1708973001ND
2017-05-17Q1720171002ND
2017-07-27Q1731203001ND
2017-11-02Q1756366001ND
2018-02-22Q1807531001ND
2018-05-15Q18197040029.90 ppb
2018-07-18Q18285360013.30 ppb
2018-11-13Q18455300013.40 ppb
2019-03-07Q19098270012.50 ppb
2019-05-29Q1929421001ND
2019-08-01Q19503950014.70 ppb
2019-12-11Q1979816001ND