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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Cnp Utility District

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
20141.47 ppb166ND - 10.8 ppb
20151.18 ppb165ND - 7.50 ppb
20160.756 ppb165ND - 3.10 ppb
20170.625 ppb162ND - 7.70 ppb
2018ND160ND
20191.71 ppb168ND - 7.30 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
2014-02-26AC44734ND
2014-02-26AC447373.70 ppb
2014-02-26AC44736ND
2014-02-26AC44733ND
2014-04-03AC492202.00 ppb
2014-04-03AC492132.90 ppb
2014-04-03AC492142.10 ppb
2014-04-03AC4920510.8 ppb
2014-08-06AC62392ND
2014-08-06AC62394ND
2014-08-06AC62390ND
2014-08-06AC62396ND
2014-12-16AC75065ND
2014-12-16AC750962.00 ppb
2014-12-16AC75061ND
2014-12-16AC75071ND
2015-02-02AC78698ND
2015-02-02AC78697ND
2015-02-02AC78701ND
2015-02-02AC78730ND
2015-05-28AC937213.10 ppb
2015-05-28AC93719ND
2015-05-28AC937292.90 ppb
2015-05-28AC937203.30 ppb
2015-07-22AD005792.00 ppb
2015-07-22AD005857.50 ppb
2015-07-22AD00578ND
2015-07-22AD00582ND
2015-12-01AD14862ND
2015-12-01AD14860ND
2015-12-01AD14861ND
2015-12-01AD14846ND
2016-02-09AD227262.10 ppb
2016-02-09AD22703ND
2016-02-09AD22709ND
2016-02-09AD22710ND
2016-04-27AD34404ND
2016-04-27AD34406ND
2016-04-27AD34405ND
2016-04-27AD34416ND
2016-09-19AD500002.30 ppb
2016-09-19AD500773.10 ppb
2016-09-19AD500712.30 ppb
2016-09-19AD50019ND
2016-11-15AD57968ND
2016-11-15AD57993ND
2016-11-15AD57988ND
2016-11-15AD579922.30 ppb
2017-02-13AD703452.30 ppb
2017-02-13AD70347ND
2017-02-13AD70346ND
2017-02-13AD70348ND
2017-05-10AD836257.70 ppb
2017-05-10AD83629ND
2017-05-10AD83628ND
2017-05-10AD83622ND
2017-08-08AD92372ND
2017-08-08AD92371ND
2017-08-08AD92368ND
2017-08-08AD92367ND
2017-10-24AE01778ND
2017-10-24AE01784ND
2017-10-24AE01776ND
2017-10-24AE01762ND
2018-02-07AE12731ND
2018-02-07AE12728ND
2018-02-07AE12727ND
2018-02-07AE12744ND
2018-05-02AE24766ND
2018-05-02AE24767ND
2018-05-02AE24783ND
2018-05-02AE24784ND
2018-08-01AE35264ND
2018-08-01AE35260ND
2018-08-01AE35261ND
2018-08-01AE35270ND
2018-11-16AE46440ND
2018-11-16AE46443ND
2018-11-16AE46442ND
2018-11-16AE46441ND
2019-02-05AE528962.20 ppb
2019-02-05AE528942.50 ppb
2019-02-05AE528902.20 ppb
2019-02-05AE528892.30 ppb
2019-05-20AE670933.10 ppb
2019-05-20AE670727.30 ppb
2019-05-20AE670944.10 ppb
2019-05-20AE67090ND
2019-08-06AE77197ND
2019-08-06AE771983.60 ppb
2019-08-06AE77191ND
2019-08-06AE77195ND
2019-12-13AE92419ND
2019-12-13AE92416ND
2019-12-13AE92417ND
2019-12-13AE92420ND