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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Holliston Water Department

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.

 

29

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
20150.438 ppb133ND - 2.80 ppb
20160.544 ppb165ND - 2.20 ppb
2017N/A00N/A

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 Result
2015-03-10ND
2015-03-10ND
2015-03-10ND
2015-03-10ND
2015-06-091.80 ppb
2015-06-09ND
2015-06-09ND
2015-06-10ND
2015-09-081.10 ppb
2015-09-08ND
2015-09-08ND
2015-09-08ND
2015-12-102.80 ppb
2016-03-08ND
2016-03-081.30 ppb
2016-03-08ND
2016-03-08ND
2016-06-142.00 ppb
2016-06-141.10 ppb
2016-06-14ND
2016-06-14ND
2016-09-13ND
2016-09-132.10 ppb
2016-09-13ND
2016-09-13ND
2016-12-13ND
2016-12-13ND
2016-12-13ND
2016-12-132.20 ppb