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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Mountain Park Public Works Authority

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
20120.750 ppb41ND - 3.00 ppb
2013ND10ND
2014ND40ND
2015ND40ND
20163.53 ppb43ND - 5.10 ppb
20172.90 ppb32ND - 5.00 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
2013-11-121255890ND
2014-02-101276859ND
2014-05-191302846ND
2014-08-061323519ND
2014-11-101348958ND
2015-02-091371580ND
2015-05-111394060ND
2015-08-241421566ND
2015-11-091442460ND
2016-02-081465732ND
2016-05-231038688045.10 ppb
2016-08-151065853045.10 ppb
2016-11-211105163043.90 ppb
2017-02-06112355104ND
2017-05-151152876045.00 ppb
2017-11-061211647043.70 ppb