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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Weleetka Public Works Authority

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

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20146.17 ppb104ND - 31.6 ppb
20156.77 ppb87ND - 20.9 ppb
20163.07 ppb86ND - 9.44 ppb
20171.88 ppb82ND - 8.59 ppb
2018ND80ND
2019ND100ND

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
2014-01-021401011ND
2014-01-021401010ND
2014-03-13140338231.6 ppb
2014-03-13140338127.0 ppb
2014-06-061406240ND
2014-06-061406239ND
2014-09-051409177ND
2014-09-051409176ND
2014-12-0414121631.31 ppb
2014-12-0414121621.83 ppb
2015-03-0615031802.14 ppb
2015-03-0615031791.70 ppb
2015-06-05150619520.5 ppb
2015-06-05150619420.9 ppb
2015-09-111509381ND
2015-09-1115093801.88 ppb
2015-12-1115124491.63 ppb
2015-12-1115124485.37 ppb
2016-03-1116034342.47 ppb
2016-03-1116034339.44 ppb
2016-06-101606292ND
2016-06-101606291ND
2016-09-0916092591.01 ppb
2016-09-0916092581.34 ppb
2016-12-0916122844.75 ppb
2016-12-0916122855.56 ppb
2017-03-1017032588.59 ppb
2017-03-1017032576.46 ppb
2017-06-201706490ND
2017-06-201706489ND
2017-09-081709308ND
2017-09-081709307ND
2017-12-081712242ND
2017-12-081712241ND
2018-02-221802633ND
2018-02-281803319ND
2018-06-081806286ND
2018-06-081806285ND
2018-09-071809254ND
2018-09-071809253ND
2018-12-061812220ND
2018-12-061812219ND
2019-02-071902268ND
2019-02-071902267ND
2019-03-081903258ND
2019-03-081903257ND
2019-06-071906288ND
2019-06-071906287ND
2019-09-191909710ND
2019-09-191909709ND
2019-12-191912700ND
2019-12-191912701ND