Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Harris County MUD 55 Heritage Park

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
2014ND160ND
20150.900 ppb165ND - 3.70 ppb
20160.125 ppb161ND - 2.00 ppb
2017ND160ND
20180.506 ppb163ND - 3.30 ppb
20190.456 ppb163ND - 2.70 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
2014-02-14AC43059ND
2014-02-14AC43075ND
2014-02-14AC43056ND
2014-02-14AC43035ND
2014-04-11AC50396ND
2014-04-11AC50404ND
2014-04-11AC50411ND
2014-04-11AC50403ND
2014-07-25AC61191ND
2014-07-25AC61187ND
2014-07-25AC61192ND
2014-07-25AC61188ND
2014-11-24AC72714ND
2014-11-24AC72713ND
2014-11-24AC72721ND
2014-11-24AC72715ND
2015-01-16AC76616ND
2015-01-16AC766132.60 ppb
2015-01-16AC76615ND
2015-01-16AC76617ND
2015-04-13AC87942ND
2015-04-13AC879503.70 ppb
2015-04-13AC879412.10 ppb
2015-04-13AC879402.70 ppb
2015-08-17AD04248ND
2015-08-17AD04278ND
2015-08-17AD04305ND
2015-08-17AD042883.30 ppb
2015-12-15AD16947ND
2015-12-15AD16950ND
2015-12-15AD16949ND
2015-12-15AD16948ND
2016-02-10AD229972.00 ppb
2016-02-10AD23004ND
2016-02-10AD23000ND
2016-02-10AD22998ND
2016-05-11AD36361ND
2016-05-11AD36370ND
2016-05-11AD36357ND
2016-05-11AD36367ND
2016-09-16AD50059ND
2016-09-16AD50058ND
2016-09-16AD50044ND
2016-09-16AD50013ND
2016-10-20AD54029ND
2016-10-20AD54026ND
2016-10-20AD54021ND
2016-10-20AD54025ND
2017-01-25AD66780ND
2017-01-25AD66773ND
2017-01-25AD66765ND
2017-01-25AD66762ND
2017-05-24AD85403ND
2017-05-24AD85401ND
2017-05-24AD85402ND
2017-05-24AD85404ND
2017-07-31AD91302ND
2017-07-31AD91306ND
2017-07-31AD91308ND
2017-07-31AD91307ND
2017-10-30AE02638ND
2017-10-30AE02637ND
2017-10-30AE02626ND
2017-10-30AE02623ND
2018-01-23AE09833ND
2018-01-23AE09846ND
2018-01-23AE09844ND
2018-01-23AE09832ND
2018-04-11AE22230ND
2018-04-11AE22232ND
2018-04-11AE22233ND
2018-04-11AE22231ND
2018-07-18AE337343.30 ppb
2018-07-18AE337402.50 ppb
2018-07-18AE337362.30 ppb
2018-07-18AE33741ND
2018-10-22AE44102ND
2018-10-22AE44108ND
2018-10-22AE44106ND
2018-10-22AE44105ND
2019-02-26AE55910ND
2019-02-26AE55909ND
2019-02-26AE55911ND
2019-02-26AE55907ND
2019-05-24AE68100ND
2019-05-24AE68101ND
2019-05-24AE68106ND
2019-05-24AE68103ND
2019-08-13AE78271ND
2019-08-13AE782722.70 ppb
2019-08-13AE782702.20 ppb
2019-08-13AE782742.40 ppb
2019-12-05AE91403ND
2019-12-05AE91383ND
2019-12-05AE91382ND
2019-12-05AE91404ND