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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Assumption Parish Waterworks District 1

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

 

192

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
20142.41 ppb32321.000 ppb - 7.20 ppb
20152.59 ppb3228ND - 5.30 ppb
20160.156 ppb322ND - 2.50 ppb
20170.669 ppb3214ND - 2.10 ppb
20180.781 ppb3214ND - 2.90 ppb
20193.73 ppb3230ND - 11.2 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
2014-03-05351290670012.00 ppb
2014-03-05351290670022.50 ppb
2014-03-05351290670032.90 ppb
2014-03-05351290670042.20 ppb
2014-03-05351290670012.00 ppb
2014-03-05351290670022.50 ppb
2014-03-05351290670032.90 ppb
2014-03-05351290670042.20 ppb
2014-06-16351424920011.40 ppb
2014-06-16351424920027.20 ppb
2014-06-16351424920032.30 ppb
2014-06-16351424920041.80 ppb
2014-06-16351424920011.40 ppb
2014-06-16351424920027.20 ppb
2014-06-16351424920032.30 ppb
2014-06-16351424920041.80 ppb
2014-09-04351537960012.40 ppb
2014-09-04351537960021.000 ppb
2014-09-04351537960031.50 ppb
2014-09-04351537960041.60 ppb
2014-09-04351537960012.40 ppb
2014-09-04351537960021.000 ppb
2014-09-04351537960031.50 ppb
2014-09-04351537960041.60 ppb
2014-12-09351672940011.70 ppb
2014-12-09351672940023.70 ppb
2014-12-09351672940031.90 ppb
2014-12-09351672940042.50 ppb
2014-12-09351672940011.70 ppb
2014-12-09351672940023.70 ppb
2014-12-09351672940031.90 ppb
2014-12-09351672940042.50 ppb
2015-03-03351778890012.40 ppb
2015-03-03351778890022.50 ppb
2015-03-03351778890032.40 ppb
2015-03-03351778890042.30 ppb
2015-03-03351778890012.40 ppb
2015-03-03351778890022.50 ppb
2015-03-03351778890032.40 ppb
2015-03-03351778890042.30 ppb
2015-06-03351913520011.50 ppb
2015-06-03351913520022.10 ppb
2015-06-03351913520032.90 ppb
2015-06-03351913520042.30 ppb
2015-06-03351913520011.50 ppb
2015-06-03351913520022.10 ppb
2015-06-03351913520032.90 ppb
2015-06-03351913520042.30 ppb
2015-09-02352055880011.40 ppb
2015-09-0235205588002ND
2015-09-0235205588003ND
2015-09-02352055880042.40 ppb
2015-09-02352055880011.40 ppb
2015-09-0235205588002ND
2015-09-0235205588003ND
2015-09-02352055880042.40 ppb
2015-12-03352195030014.40 ppb
2015-12-03352195030024.60 ppb
2015-12-03352195030035.30 ppb
2015-12-03352195030044.90 ppb
2015-12-03352195030014.40 ppb
2015-12-03352195030024.60 ppb
2015-12-03352195030035.30 ppb
2015-12-03352195030044.90 ppb
2016-03-0335233003001ND
2016-03-0335233003002ND
2016-03-0335233003003ND
2016-03-0335233003004ND
2016-03-0335233003001ND
2016-03-0335233003002ND
2016-03-0335233003003ND
2016-03-0335233003004ND
2016-06-0835248766001ND
2016-06-0835248766002ND
2016-06-0835248766003ND
2016-06-0835248766004ND
2016-06-0835248766001ND
2016-06-0835248766002ND
2016-06-0835248766003ND
2016-06-0835248766004ND
2016-09-1335265297001ND
2016-09-1335265297002ND
2016-09-13352652970032.50 ppb
2016-09-1335265297004ND
2016-09-1335265297001ND
2016-09-1335265297002ND
2016-09-13352652970032.50 ppb
2016-09-1335265297004ND
2016-12-0635281463001ND
2016-12-0635281463002ND
2016-12-0635281463003ND
2016-12-0635281463004ND
2016-12-0635281463001ND
2016-12-0635281463002ND
2016-12-0635281463003ND
2016-12-0635281463004ND
2017-03-02352986540011.30 ppb
2017-03-0235298654002ND
2017-03-02352986540031.10 ppb
2017-03-02352986540041.20 ppb
2017-03-02352986540011.30 ppb
2017-03-0235298654002ND
2017-03-02352986540031.10 ppb
2017-03-02352986540041.20 ppb
2017-06-1335318182001ND
2017-06-1335318182002ND
2017-06-1335318182003ND
2017-06-1335318182004ND
2017-06-1335318182001ND
2017-06-1335318182002ND
2017-06-1335318182003ND
2017-06-1335318182004ND
2017-09-08353353230072.10 ppb
2017-09-08353353230081.60 ppb
2017-09-08353353230091.90 ppb
2017-09-08353353230101.50 ppb
2017-09-08353353230072.10 ppb
2017-09-08353353230081.60 ppb
2017-09-08353353230091.90 ppb
2017-09-08353353230101.50 ppb
2017-12-0135360554001ND
2017-12-0135360554002ND
2017-12-0135360554003ND
2017-12-0135360554004ND
2017-12-0135360554001ND
2017-12-0135360554002ND
2017-12-0135360554003ND
2017-12-0135360554004ND
2018-03-02353777840011.60 ppb
2018-03-02353777840021.40 ppb
2018-03-02353777840031.70 ppb
2018-03-02353777840042.10 ppb
2018-03-02353777840011.60 ppb
2018-03-02353777840021.40 ppb
2018-03-02353777840031.70 ppb
2018-03-02353777840042.10 ppb
2018-06-0635396758001ND
2018-06-0635396758002ND
2018-06-0635396758003ND
2018-06-0635396758004ND
2018-06-0635396758001ND
2018-06-0635396758002ND
2018-06-0635396758003ND
2018-06-0635396758004ND
2018-09-0735416297001ND
2018-09-0735416297002ND
2018-09-0735416297003ND
2018-09-0735416297004ND
2018-09-0735416297001ND
2018-09-0735416297002ND
2018-09-0735416297003ND
2018-09-0735416297004ND
2018-12-05354354130011.30 ppb
2018-12-05354354130021.50 ppb
2018-12-0535435413004ND
2018-12-05354354130011.30 ppb
2018-12-05354354130021.50 ppb
2018-12-0535435413004ND
2018-12-11354366370012.90 ppb
2018-12-11354366370012.90 ppb
2019-03-07354529480011.10 ppb
2019-03-07354529480021.10 ppb
2019-03-07354529480031.10 ppb
2019-03-0735452948004ND
2019-03-07354529480011.10 ppb
2019-03-07354529480021.10 ppb
2019-03-07354529480031.10 ppb
2019-03-0735452948004ND
2019-06-07354738790017.80 ppb
2019-06-073547387900210.4 ppb
2019-06-073547387900311.2 ppb
2019-06-073547387900410.7 ppb
2019-06-07354738790017.80 ppb
2019-06-073547387900210.4 ppb
2019-06-073547387900311.2 ppb
2019-06-073547387900410.7 ppb
2019-09-06354958280012.60 ppb
2019-09-06354958280023.00 ppb
2019-09-06354958280033.10 ppb
2019-09-06354958280042.60 ppb
2019-09-06354958280012.60 ppb
2019-09-06354958280023.00 ppb
2019-09-06354958280033.10 ppb
2019-09-06354958280042.60 ppb
2019-12-06355171560011.40 ppb
2019-12-06355171560021.20 ppb
2019-12-06355171560031.20 ppb
2019-12-06355171560041.20 ppb
2019-12-06355171560011.40 ppb
2019-12-06355171560021.20 ppb
2019-12-06355171560031.20 ppb
2019-12-06355171560041.20 ppb