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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Aqua Pa Uwchlan

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
20171.78 ppb165ND - 9.10 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
2017-02-10156481933.40 ppb
2017-02-1015648205ND
2017-02-10156482172.90 ppb
2017-02-1015648229ND
2017-05-11160859639.10 ppb
2017-05-11160859756.70 ppb
2017-05-1116085987ND
2017-05-11160859996.30 ppb
2017-08-1116557677ND
2017-08-1116557671ND
2017-08-1116557665ND
2017-08-1116557659ND
2017-11-0717016121ND
2017-11-0717016127ND
2017-11-0717016137ND
2017-11-0717016139ND