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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Southwest Ouachita Waterworks Inc.

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

 

108

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
20151.18 ppb86ND - 1.80 ppb
20161.09 ppb164ND - 7.20 ppb
20170.225 ppb162ND - 1.80 ppb
20180.288 ppb324ND - 3.40 ppb
20190.504 ppb3212ND - 1.80 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
2014-08-051323132ND
2014-08-051323133ND
2014-08-051323132ND
2014-08-051323133ND
2015-08-06352020730011.40 ppb
2015-08-0635202073002ND
2015-08-06352020730011.40 ppb
2015-08-0635202073002ND
2015-11-09352158790011.50 ppb
2015-11-09352158790021.80 ppb
2015-11-09352158790011.50 ppb
2015-11-09352158790021.80 ppb
2016-02-1035229687001ND
2016-02-10352296870021.50 ppb
2016-02-1035229687001ND
2016-02-10352296870021.50 ppb
2016-05-03LA20160-1ND
2016-05-03LA20160-2ND
2016-05-03LA20160-1ND
2016-05-03LA20160-2ND
2016-08-02LA23772-1ND
2016-08-02LA23772-2ND
2016-08-02LA23772-1ND
2016-08-02LA23772-2ND
2016-11-01LA27141-17.20 ppb
2016-11-01LA27141-2ND
2016-11-01LA27141-17.20 ppb
2016-11-01LA27141-2ND
2017-02-0835294463008ND
2017-02-0835294463009ND
2017-02-0835294463008ND
2017-02-0835294463009ND
2017-05-0435310618025ND
2017-05-04353106180261.80 ppb
2017-05-0435310618025ND
2017-05-04353106180261.80 ppb
2017-08-0435328358005ND
2017-08-0435328358006ND
2017-08-0435328358005ND
2017-08-0435328358006ND
2017-11-1635349181001ND
2017-11-1635349181002ND
2017-11-1635349181001ND
2017-11-1635349181002ND
2018-02-1235373925001ND
2018-02-12353739250023.40 ppb
2018-02-1235373925003ND
2018-02-1235373925004ND
2018-02-1235373925001ND
2018-02-12353739250023.40 ppb
2018-02-1235373925003ND
2018-02-1235373925004ND
2018-05-1735393225001ND
2018-05-1735393225002ND
2018-05-1735393225003ND
2018-05-1735393225004ND
2018-05-1735393225001ND
2018-05-1735393225002ND
2018-05-1735393225003ND
2018-05-1735393225004ND
2018-08-1435411617001ND
2018-08-1435411617002ND
2018-08-1435411617003ND
2018-08-1435411617004ND
2018-08-1435411617001ND
2018-08-1435411617002ND
2018-08-1435411617003ND
2018-08-1435411617004ND
2018-11-02354282260011.20 ppb
2018-11-0235428226002ND
2018-11-0235428226003ND
2018-11-0235428226004ND
2018-11-02354282260011.20 ppb
2018-11-0235428226002ND
2018-11-0235428226003ND
2018-11-0235428226004ND
2019-02-01354457500011.50 ppb
2019-02-0135445750002ND
2019-02-0135445750003ND
2019-02-0135445750004ND
2019-02-01354457500011.50 ppb
2019-02-0135445750002ND
2019-02-0135445750003ND
2019-02-0135445750004ND
2019-05-14354693220011.80 ppb
2019-05-1435469322002ND
2019-05-1435469322003ND
2019-05-1435469322004ND
2019-05-14354693220011.80 ppb
2019-05-1435469322002ND
2019-05-1435469322003ND
2019-05-1435469322004ND
2019-08-20354919340011.70 ppb
2019-08-20354919340021.10 ppb
2019-08-20354919340030.970 ppb
2019-08-20354919340041.000 ppb
2019-08-20354919340011.70 ppb
2019-08-20354919340021.10 ppb
2019-08-20354919340030.970 ppb
2019-08-20354919340041.000 ppb
2019-11-2035514588001ND
2019-11-2035514588002ND
2019-11-2035514588003ND
2019-11-2035514588004ND
2019-11-2035514588001ND
2019-11-2035514588002ND
2019-11-2035514588003ND
2019-11-2035514588004ND