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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Downsville Water System

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND160ND
2016ND120ND
20170.538 ppb164ND - 2.20 ppb
20181.82 ppb1612ND - 3.20 ppb
20192.41 ppb1614ND - 3.30 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
2014-03-311289484ND
2014-03-311289483ND
2014-03-311289484ND
2014-03-311289483ND
2014-05-161302301ND
2014-05-161302302ND
2014-05-161302302ND
2014-05-161302301ND
2014-08-081324621ND
2014-08-081324622ND
2014-08-081324622ND
2014-08-081324621ND
2015-02-161373209ND
2015-02-161373210ND
2015-02-161373210ND
2015-02-161373209ND
2015-03-271382543ND
2015-03-271382544ND
2015-03-271382544ND
2015-03-271382543ND
2015-07-101409669ND
2015-07-101409670ND
2015-07-101409670ND
2015-07-101409669ND
2015-10-301440052ND
2015-10-301440053ND
2015-10-301440052ND
2015-10-301440053ND
2016-03-031472025ND
2016-03-031472026ND
2016-03-031472025ND
2016-03-031472026ND
2016-06-091498401ND
2016-06-091498402ND
2016-06-091498401ND
2016-06-091498402ND
2016-09-181526481ND
2016-09-181526480ND
2016-09-181526481ND
2016-09-181526480ND
2017-03-0235298606004ND
2017-03-0235298606003ND
2017-03-0235298606003ND
2017-03-0235298606004ND
2017-06-1535318897009ND
2017-06-1535318897010ND
2017-06-1535318897010ND
2017-06-1535318897009ND
2017-09-07353350060102.20 ppb
2017-09-07353350060092.10 ppb
2017-09-07353350060102.20 ppb
2017-09-07353350060092.10 ppb
2017-12-1835364708001ND
2017-12-1835364708002ND
2017-12-1835364708002ND
2017-12-1835364708001ND
2018-03-15353807710010.920 ppb
2018-03-15353807710010.920 ppb
2018-03-2735382808001ND
2018-03-2735382808001ND
2018-06-18353998780012.90 ppb
2018-06-18353998780023.20 ppb
2018-06-18353998780012.90 ppb
2018-06-18353998780023.20 ppb
2018-09-19354194250013.10 ppb
2018-09-1935419425002ND
2018-09-19354194250013.10 ppb
2018-09-1935419425002ND
2018-12-05354357920011.40 ppb
2018-12-05354357920023.00 ppb
2018-12-05354357920011.40 ppb
2018-12-05354357920023.00 ppb
2019-03-2035456293002ND
2019-03-20354562930012.20 ppb
2019-03-20354562930012.20 ppb
2019-03-2035456293002ND
2019-06-04354739290023.00 ppb
2019-06-04354739290023.00 ppb
2019-06-04354739290013.30 ppb
2019-06-04354739290013.30 ppb
2019-09-18354995460022.30 ppb
2019-09-18354995460013.30 ppb
2019-09-18354995460013.30 ppb
2019-09-18354995460022.30 ppb
2019-12-04355169060012.30 ppb
2019-12-04355169060022.90 ppb
2019-12-04355169060012.30 ppb
2019-12-04355169060022.90 ppb