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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Rockwall

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.315 ppb132ND - 2.10 ppb
20151.30 ppb165ND - 10.6 ppb
20161.10 ppb164ND - 5.80 ppb
20170.431 ppb164ND - 2.70 ppb
20181.33 ppb166ND - 4.60 ppb
20191.52 ppb1612ND - 3.50 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
2014-02-12Q1404482001ND
2014-04-21Q14125530042.10 ppb
2014-04-21Q14125530032.00 ppb
2014-04-21Q1412553002ND
2014-04-21Q1412553001ND
2014-07-14Q1427934004ND
2014-07-14Q1427934003ND
2014-07-14Q1427934002ND
2014-07-14Q1427934001ND
2014-10-16Q1452870002ND
2014-10-16Q1452870001ND
2014-10-16Q1452870003ND
2014-10-16Q1452870004ND
2015-01-20Q15018290042.60 ppb
2015-01-20Q15018290032.70 ppb
2015-01-20Q15018290022.40 ppb
2015-01-20Q15018290012.50 ppb
2015-04-20Q1515088004ND
2015-04-20Q1515088003ND
2015-04-20Q1515088002ND
2015-04-20Q1515088001ND
2015-07-17Q1527980003ND
2015-07-17Q1527980001ND
2015-07-17Q1527980002ND
2015-07-17Q1527980004ND
2015-10-12Q1540074004ND
2015-10-12Q154007400310.6 ppb
2015-10-12Q1540074002ND
2015-10-12Q1540074001ND
2016-02-09Q1605409004ND
2016-02-09Q1605409003ND
2016-02-09Q1605409002ND
2016-02-09Q1605409001ND
2016-05-04Q1617770003ND
2016-05-04Q1617770001ND
2016-05-04Q1617770002ND
2016-05-04Q1617770004ND
2016-07-19Q1629237004ND
2016-07-19Q1629237001ND
2016-07-19Q1629237003ND
2016-07-19Q1629237002ND
2016-10-11Q16429900045.80 ppb
2016-10-11Q16429900034.90 ppb
2016-10-11Q16429900024.90 ppb
2016-10-11Q16429900012.00 ppb
2017-01-12Q17015810021.80 ppb
2017-01-12Q17015810061.000 ppb
2017-01-12Q1701581001ND
2017-01-12Q17015810051.40 ppb
2017-04-18Q17159240032.70 ppb
2017-04-18Q1715924002ND
2017-04-18Q1715924001ND
2017-04-18Q1715924004ND
2017-07-12Q1728462004ND
2017-07-12Q1728462003ND
2017-07-12Q1728462002ND
2017-07-12Q1728462001ND
2017-10-16Q1753106002ND
2017-10-16Q1753106001ND
2017-10-16Q1753106003ND
2017-10-16Q1753106004ND
2018-01-08Q1800590004ND
2018-01-08Q1800590003ND
2018-01-08Q1800590002ND
2018-01-08Q1800590001ND
2018-04-04Q18139770044.60 ppb
2018-04-04Q18139770023.50 ppb
2018-04-04Q18139770034.00 ppb
2018-04-04Q18139770014.20 ppb
2018-07-10Q1827367006ND
2018-07-10Q18273670032.50 ppb
2018-07-10Q18273670042.40 ppb
2018-07-10Q1827367005ND
2018-10-04Q1839809004ND
2018-10-04Q1839809003ND
2018-10-04Q1839809002ND
2018-10-04Q1839809001ND
2019-02-25Q19084100031.80 ppb
2019-02-25Q19084100011.80 ppb
2019-02-25Q19084100042.10 ppb
2019-02-25Q19084100021.50 ppb
2019-06-03Q19314890042.80 ppb
2019-06-03Q19314890033.50 ppb
2019-06-03Q19314890023.00 ppb
2019-06-03Q19314890012.80 ppb
2019-09-20Q19680360041.30 ppb
2019-09-20Q19680360031.20 ppb
2019-09-20Q19680360021.20 ppb
2019-09-20Q19680360011.30 ppb
2019-11-18Q1977579004ND
2019-11-18Q1977579005ND
2019-11-18Q1977579006ND
2019-11-18Q1977579003ND