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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Mercedes

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

 

95

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
2014ND150ND
2015ND160ND
2016ND160ND
2017ND160ND
20180.250 ppb162ND - 2.00 ppb
20190.238 ppb161ND - 3.80 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
2014-02-26AC44714ND
2014-02-26AC44725ND
2014-02-26AC44717ND
2014-04-23AC51601ND
2014-04-23AC51599ND
2014-04-23AC51607ND
2014-04-23AC51597ND
2014-07-10AC59343ND
2014-07-10AC59390ND
2014-07-10AC59339ND
2014-07-10AC59344ND
2014-11-20AC72659ND
2014-11-20AC72657ND
2014-11-20AC72641ND
2014-11-20AC72660ND
2015-01-22AC77420ND
2015-01-22AC77421ND
2015-01-22AC77423ND
2015-01-22AC77422ND
2015-06-10AC95415ND
2015-06-10AC95397ND
2015-06-10AC95416ND
2015-06-10AC95418ND
2015-08-05AD02623ND
2015-08-05AD02611ND
2015-08-05AD02620ND
2015-08-05AD02619ND
2015-10-21AD11282ND
2015-10-21AD11289ND
2015-10-21AD11286ND
2015-10-21AD11288ND
2016-01-28AD20689ND
2016-01-28AD20692ND
2016-01-28AD20690ND
2016-01-28AD20691ND
2016-04-28AD34618ND
2016-04-28AD34619ND
2016-04-29AD34803ND
2016-04-29AD34808ND
2016-07-12AD43998ND
2016-07-12AD44002ND
2016-07-12AD43999ND
2016-07-12AD44014ND
2016-11-16AD58268ND
2016-11-16AD58274ND
2016-11-16AD58270ND
2016-11-16AD58272ND
2017-02-08AD69538ND
2017-02-08AD69540ND
2017-02-08AD69539ND
2017-02-08AD69541ND
2017-05-03AD82376ND
2017-05-03AD82375ND
2017-05-03AD82373ND
2017-05-03AD82374ND
2017-08-01AD91554ND
2017-08-01AD91560ND
2017-08-01AD91558ND
2017-08-01AD91553ND
2017-11-01AE03176ND
2017-11-01AE03171ND
2017-11-01AE03177ND
2017-11-01AE03173ND
2018-01-31AE11476ND
2018-01-31AE11477ND
2018-01-31AE11478ND
2018-01-31AE11479ND
2018-05-17AE26739ND
2018-05-17AE26735ND
2018-05-17AE26751ND
2018-05-17AE26741ND
2018-08-13AE36575ND
2018-08-13AE36628ND
2018-08-13AE365812.00 ppb
2018-08-13AE365782.00 ppb
2018-11-07AE45597ND
2018-11-07AE45589ND
2018-11-07AE45586ND
2018-11-07AE45600ND
2019-02-27AE56236ND
2019-02-27AE56237ND
2019-02-27AE56233ND
2019-02-27AE562313.80 ppb
2019-06-04AE69221ND
2019-06-04AE69203ND
2019-06-04AE69200ND
2019-06-04AE69204ND
2019-08-22AE80162ND
2019-08-22AE80163ND
2019-08-22AE80158ND
2019-08-22AE80166ND
2019-10-01AE85319ND
2019-10-01AE85323ND
2019-10-01AE85320ND
2019-10-01AE85322ND