Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Two Rivers Waterworks

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
20140.362 ppb165ND - 1.60 ppb
2015ND160ND
20160.173 ppb162ND - 2.00 ppb
20170.0875 ppb161ND - 1.40 ppb
20180.323 ppb164ND - 1.90 ppb
2019ND160ND

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
2014-03-12774498ND
2014-03-12774496ND
2014-03-127744971.60 ppb
2014-03-12774499ND
2014-06-097953310.490 ppb
2014-06-097953281.10 ppb
2014-06-097953301.30 ppb
2014-06-097953291.30 ppb
2014-09-09816689ND
2014-09-09816688ND
2014-09-09816687ND
2014-09-09816690ND
2014-12-03834181ND
2014-12-03834184ND
2014-12-03834182ND
2014-12-03834183ND
2015-03-10847404ND
2015-03-10847405ND
2015-03-10847402ND
2015-03-10847403ND
2015-06-09864488ND
2015-06-09864489ND
2015-06-09864487ND
2015-06-09864486ND
2015-09-08881356ND
2015-09-08881358ND
2015-09-08881359ND
2015-09-08881357ND
2015-12-08897402ND
2015-12-08897399ND
2015-12-08897400ND
2015-12-08897401ND
2016-03-08908906ND
2016-03-08908907ND
2016-03-08908908ND
2016-03-08908909ND
2016-06-079253532.00 ppb
2016-06-07925350ND
2016-06-07925352ND
2016-06-07925351ND
2016-09-07943735ND
2016-09-07943734ND
2016-09-07943732ND
2016-09-07943733ND
2016-12-06964520ND
2016-12-06964522ND
2016-12-06964521ND
2016-12-069645230.770 ppb
2017-03-07976540ND
2017-03-07976538ND
2017-03-07976537ND
2017-03-07976539ND
2017-06-07996156ND
2017-06-07996158ND
2017-06-07996157ND
2017-06-07996155ND
2017-09-061016354ND
2017-09-061016357ND
2017-09-061016356ND
2017-09-0610163551.40 ppb
2017-12-051032192ND
2017-12-051032190ND
2017-12-051032191ND
2017-12-051032189ND
2018-03-121044620ND
2018-03-121044622ND
2018-03-121044621ND
2018-03-121044623ND
2018-06-131061272ND
2018-06-131061273ND
2018-06-131061275ND
2018-06-131061274ND
2018-09-1310802441.90 ppb
2018-09-1310802461.20 ppb
2018-09-1310802451.10 ppb
2018-09-1310802470.960 ppb
2018-12-051095830ND
2018-12-051095827ND
2018-12-051095829ND
2018-12-051095828ND
2019-03-131109444ND
2019-03-131109445ND
2019-03-131109443ND
2019-03-131109442ND
2019-06-101126359ND
2019-06-101126356ND
2019-06-101126357ND
2019-06-101126358ND
2019-09-031144990ND
2019-09-031144991ND
2019-09-031144992ND
2019-09-031144989ND
2019-12-031163159ND
2019-12-031163160ND
2019-12-031163158ND
2019-12-031163157ND