Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Reading Area Water 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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
20170.219 ppb323ND - 3.00 ppb
20180.438 ppb321ND - 14.0 ppb
2019ND320ND

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
2017-01-03155510153.00 ppb
2017-01-03155510142.00 ppb
2017-01-03155510132.00 ppb
2017-01-0515551012ND
2017-01-0515551008ND
2017-01-0515551010ND
2017-01-0515551009ND
2017-01-0515551011ND
2017-04-0315975129ND
2017-04-0315975151ND
2017-04-0315975140ND
2017-04-0315975184ND
2017-04-0615975173ND
2017-04-0615975118ND
2017-04-0615975162ND
2017-04-0615975107ND
2017-07-0516449590ND
2017-07-0516449579ND
2017-07-0516449634ND
2017-07-0616449557ND
2017-07-0616449612ND
2017-07-0616449568ND
2017-07-0716449601ND
2017-07-0716449623ND
2017-10-0216914160ND
2017-10-0216914149ND
2017-10-0216914138ND
2017-10-0216914193ND
2017-10-0516914171ND
2017-10-0516914182ND
2017-10-0516914127ND
2017-10-0516914116ND
2018-01-028000469-08ND
2018-01-028000469-05ND
2018-01-028000469-04ND
2018-01-028000469-03ND
2018-01-048000469-01ND
2018-01-048000469-06ND
2018-01-048000469-07ND
2018-01-048000469-02ND
2018-04-028007291-08ND
2018-04-028007291-05ND
2018-04-028007291-04ND
2018-04-028007291-03ND
2018-04-058007291-07ND
2018-04-058007291-01ND
2018-04-058007291-06ND
2018-04-058007291-02ND
2018-07-028018983-03ND
2018-07-028018983-04ND
2018-07-028018983-05ND
2018-07-028018983-0814.0 ppb
2018-07-058018983-07ND
2018-07-058018983-06ND
2018-07-058018983-02ND
2018-07-058018983-01ND
2018-10-018026912-04ND
2018-10-018026912-05ND
2018-10-018026912-03ND
2018-10-018026912-08ND
2018-10-048026912-07ND
2018-10-048026912-02ND
2018-10-048026912-06ND
2018-10-048026912-01ND
2019-01-028037891-04ND
2019-01-028037891-03ND
2019-01-028037891-08ND
2019-01-028037891-05ND
2019-01-038037891-06ND
2019-01-038037891-07ND
2019-01-038037891-01ND
2019-01-038037891-02ND
2019-04-019008754-08ND
2019-04-019008754-05ND
2019-04-019008754-03ND
2019-04-029008754-04ND
2019-04-049008754-06ND
2019-04-049008754-02ND
2019-04-049008754-07ND
2019-04-049008754-01ND
2019-07-019020550-05REND
2019-07-019020550-03REND
2019-07-019020550-08REND
2019-07-019020550-04REND
2019-07-029020550-06REND
2019-07-029020550-02REND
2019-07-029020550-07REND
2019-07-029020550-01ND
2019-10-019033527-04ND
2019-10-019033527-08ND
2019-10-019033527-05ND
2019-10-019033527-03ND
2019-10-039033527-07ND
2019-10-039033527-06ND
2019-10-039033527-02ND
2019-10-039033527-01ND