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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Ne Yell County Water Association

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

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.263 ppb81ND - 2.10 ppb
2015ND50ND
2016ND80ND
20170.500 ppb81ND - 4.00 ppb
20180.613 ppb82ND - 2.70 ppb
20190.538 ppb82ND - 2.20 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
2014-03-1814079006201ND
2014-03-1814079006301ND
2014-05-1314135002701ND
2014-05-13141350006012.10 ppb
2014-08-1214226004201ND
2014-08-1214226004101ND
2014-11-1814324004101ND
2014-11-1814324004201ND
2015-03-0315063002201ND
2015-06-0315155008201ND
2015-08-1915232004001ND
2015-11-1815322001001ND
2015-11-1815322001101ND
2016-02-2216056001501ND
2016-02-2216056001601ND
2016-05-2516147010101ND
2016-05-2516147010201ND
2016-08-1516231005201ND
2016-08-1516231005101ND
2016-11-2116327000402ND
2016-11-2116327000302ND
2017-02-1317046001601ND
2017-02-1317046001701ND
2017-05-1717138006401ND
2017-05-1717138006501ND
2017-08-28172420029014.00 ppb
2017-08-2817242002801ND
2017-11-2817333002001ND
2017-11-2817333001901ND
2018-02-1318046004201ND
2018-02-1318046004101ND
2018-05-14181370032012.70 ppb
2018-05-14181370031012.20 ppb
2018-08-1418228007301ND
2018-08-1418228007401ND
2018-11-1218319010201ND
2018-11-1218319010101ND
2019-02-1819052002201ND
2019-02-18190520023012.20 ppb
2019-05-1419136006701ND
2019-05-1419136006801ND
2019-08-1419227005401ND
2019-08-1419227005501ND
2019-11-0519311010101ND
2019-11-05193110102012.10 ppb