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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Midlothian

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

 

100

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
20140.535 ppb204ND - 2.90 ppb
20150.738 ppb162ND - 8.50 ppb
20160.744 ppb162ND - 8.00 ppb
2017ND160ND
20184.54 ppb1614ND - 16.3 ppb
20192.28 ppb16161.40 ppb - 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
2014-03-11Q1407651010ND
2014-03-11Q1407651009ND
2014-03-11Q14076510082.90 ppb
2014-03-11Q1407651011ND
2014-03-31Q1410082008ND
2014-03-31Q14100820072.40 ppb
2014-03-31Q1410082006ND
2014-03-31Q1410082005ND
2014-06-04Q1419409004ND
2014-06-04Q1419409003ND
2014-06-04Q14194090022.80 ppb
2014-06-04Q1419409001ND
2014-07-30Q1432468004ND
2014-07-30Q1432468001ND
2014-07-30Q1432468002ND
2014-07-30Q1432468003ND
2014-11-05Q1454834004ND
2014-11-05Q1454834003ND
2014-11-05Q14548340022.60 ppb
2014-11-05Q1454834001ND
2015-03-19Q1510436008ND
2015-03-19Q1510436007ND
2015-03-19Q1510436006ND
2015-03-19Q1510436005ND
2015-06-01Q1519779007ND
2015-06-01Q1519779008ND
2015-06-01Q1519779005ND
2015-06-01Q15197790063.30 ppb
2015-07-22Q15284290068.50 ppb
2015-07-22Q1528429005ND
2015-07-22Q1528429004ND
2015-07-22Q1528429003ND
2015-11-19Q1546066004ND
2015-11-19Q1546066003ND
2015-11-19Q1546066002ND
2015-11-19Q1546066001ND
2016-03-23Q1611951010ND
2016-03-23Q1611951008ND
2016-03-23Q16119510093.90 ppb
2016-03-23Q1611951011ND
2016-05-18Q1619797010ND
2016-05-18Q1619797009ND
2016-05-18Q1619797008ND
2016-05-18Q1619797007ND
2016-09-02Q1635531006ND
2016-09-02Q1635531005ND
2016-09-02Q1635531004ND
2016-09-02Q1635531003ND
2016-10-27Q16459530048.00 ppb
2016-10-27Q1645953003ND
2016-10-27Q1645953002ND
2016-10-27Q1645953001ND
2017-02-21Q1707343004ND
2017-02-21Q1707343003ND
2017-02-21Q1707343002ND
2017-02-21Q1707343001ND
2017-05-11Q1719463004ND
2017-05-11Q1719463002ND
2017-05-11Q1719463003ND
2017-05-11Q1719463001ND
2017-07-11Q1728156010ND
2017-07-11Q1728156009ND
2017-07-11Q1728156003ND
2017-07-11Q1728156004ND
2017-11-27Q1760051004ND
2017-11-27Q1760051003ND
2017-11-27Q1760051002ND
2017-11-27Q1760051001ND
2018-01-25Q180298101216.3 ppb
2018-01-25Q1802981002ND
2018-01-25Q180298101115.6 ppb
2018-01-25Q1802981001ND
2018-05-25Q18211640023.10 ppb
2018-05-25Q18211640013.30 ppb
2018-05-25Q18211640033.40 ppb
2018-05-25Q18211640043.50 ppb
2018-08-31Q18351600062.20 ppb
2018-08-31Q18351600042.40 ppb
2018-08-31Q18351600052.20 ppb
2018-08-31Q18351600039.50 ppb
2018-11-07Q18445940042.80 ppb
2018-11-07Q18445940032.50 ppb
2018-11-07Q18445940012.90 ppb
2018-11-07Q18445940022.90 ppb
2019-02-12Q19062770173.40 ppb
2019-02-12Q19062770152.70 ppb
2019-02-12Q19062770163.10 ppb
2019-02-12Q19062770183.50 ppb
2019-04-29Q19169640031.40 ppb
2019-04-29Q19169640013.20 ppb
2019-04-29Q19169640041.80 ppb
2019-04-29Q19169640021.40 ppb
2019-07-25Q19477180062.40 ppb
2019-07-25Q19477180052.40 ppb
2019-07-25Q19477180041.90 ppb
2019-07-25Q19477180032.40 ppb
2019-11-14Q19769030021.80 ppb
2019-11-14Q19769030031.80 ppb
2019-11-14Q19769030041.60 ppb
2019-11-14Q19769030011.70 ppb