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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Union City

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

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
20150.298 ppb486ND - 2.70 ppb
20160.406 ppb487ND - 3.60 ppb
20170.925 ppb41ND - 3.70 ppb
20180.457 ppb142ND - 3.20 ppb
20190.825 ppb83ND - 2.20 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
2014-01-07AI26252ND
2014-01-07AI26251ND
2014-01-07AI26250ND
2014-01-07AI26249ND
2017-06-07108938-4ND
2017-06-07108938-3ND
2017-06-07108938-2ND
2017-06-07108938-13.70 ppb
2018-01-253858886ND
2018-01-253858885ND
2018-01-253858884ND
2018-01-253858883ND
2018-04-11113112/502ND
2018-04-11113112/504ND
2018-04-11113112/503ND
2018-07-103985464,683.20 ppb
2018-07-103984563,673.20 ppb
2018-07-103984562,66ND
2018-10-114087053-54ND
2018-10-114087051-52ND
2018-10-114087049-50ND
2018-10-114087047-48ND
2019-01-154176409,13ND
2019-01-154176408,12ND
2019-01-154176407,11ND
2019-01-154176406,10ND
2019-04-114258273-74ND
2019-04-114285279-802.20 ppb
2019-04-114258277-782.20 ppb
2019-04-114258275-762.20 ppb