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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Town of Prosper

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.58 ppb129ND - 6.90 ppb
20153.35 ppb1611ND - 8.30 ppb
20161.39 ppb164ND - 6.00 ppb
2017ND160ND
20181.97 ppb1612ND - 3.90 ppb
20191.27 ppb1612ND - 2.10 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
2014-04-09Q14112870042.70 ppb
2014-04-09Q14112870032.60 ppb
2014-04-09Q14112870022.80 ppb
2014-04-09Q14112870012.50 ppb
2014-09-15Q14443040046.90 ppb
2014-09-15Q14443040034.60 ppb
2014-09-15Q14443040023.40 ppb
2014-09-15Q14443040012.60 ppb
2014-12-08Q1458907003ND
2014-12-08Q1458907002ND
2014-12-08Q14589070042.80 ppb
2014-12-08Q1458907005ND
2015-02-03Q15040730043.50 ppb
2015-02-03Q15040730033.40 ppb
2015-02-03Q15040730023.30 ppb
2015-02-03Q15040730013.70 ppb
2015-04-29Q1515882004ND
2015-04-29Q1515882003ND
2015-04-29Q1515882002ND
2015-04-29Q1515882001ND
2015-09-30Q15385870028.10 ppb
2015-09-30Q1538587001ND
2015-09-30Q15385870037.70 ppb
2015-09-30Q15385870048.30 ppb
2015-12-02Q15479150044.30 ppb
2015-12-02Q15479150034.00 ppb
2015-12-02Q15479150023.50 ppb
2015-12-02Q15479150013.80 ppb
2016-02-09Q1605592004ND
2016-02-09Q1605592003ND
2016-02-09Q1605592002ND
2016-02-09Q1605592001ND
2016-04-27Q16166210045.90 ppb
2016-04-27Q16166210015.10 ppb
2016-04-27Q16166210026.00 ppb
2016-04-27Q16166210035.20 ppb
2016-09-06Q1635669004ND
2016-09-06Q1635669003ND
2016-09-06Q1635669002ND
2016-09-06Q1635669001ND
2016-11-01Q1646791003ND
2016-11-01Q1646791005ND
2016-11-01Q1646791002ND
2016-11-01Q1646791004ND
2017-02-07Q1705541004ND
2017-02-07Q1705541003ND
2017-02-07Q1705541002ND
2017-02-07Q1705541001ND
2017-05-22Q1720684004ND
2017-05-22Q1720684003ND
2017-05-22Q1720684002ND
2017-05-22Q1720684001ND
2017-07-27Q1731124004ND
2017-07-27Q1731124003ND
2017-07-27Q1731124002ND
2017-07-27Q1731124001ND
2017-10-23Q1754448002ND
2017-10-23Q1754448001ND
2017-10-23Q1754448004ND
2017-10-23Q1754448005ND
2018-02-12Q1805951004ND
2018-02-12Q1805951003ND
2018-02-12Q1805951002ND
2018-02-12Q1805951001ND
2018-05-16Q18200770023.40 ppb
2018-05-16Q18200770013.60 ppb
2018-05-16Q18200770043.70 ppb
2018-05-16Q18200770033.90 ppb
2018-08-27Q18347040041.60 ppb
2018-08-27Q18347040012.00 ppb
2018-08-27Q18347040031.90 ppb
2018-08-27Q18347040021.80 ppb
2018-11-09Q18450470032.50 ppb
2018-11-09Q18450470022.20 ppb
2018-11-09Q18450470042.40 ppb
2018-11-09Q18450470052.50 ppb
2019-02-14Q19070290022.10 ppb
2019-02-14Q19070290012.00 ppb
2019-02-14Q19070290031.80 ppb
2019-02-14Q19070290041.70 ppb
2019-06-21Q19390920042.10 ppb
2019-06-21Q19390920031.80 ppb
2019-06-21Q19390920022.00 ppb
2019-06-21Q19390920011.60 ppb
2019-09-20Q1968031004ND
2019-09-20Q1968031003ND
2019-09-20Q1968031002ND
2019-09-20Q19680310011.20 ppb
2019-12-04Q19792560031.30 ppb
2019-12-04Q19792560041.40 ppb
2019-12-04Q19792560051.30 ppb
2019-12-04Q1979256002ND