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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

California Water Service (CWS) - King City

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

 

86

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
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND60ND

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
2014-02-115810-803-1328ND
2014-02-115810-801-1352ND
2014-02-115810-802-1312ND
2014-02-135810-804-1415ND
2014-05-145810-804-0822ND
2014-05-145810-803-1132ND
2014-05-145810-802-1230ND
2014-05-145810-801-1118ND
2014-08-125810-804-1150ND
2014-08-125810-803-1205ND
2014-08-125810-802-1050ND
2014-08-125810-801-1130ND
2014-11-125810-803-0955ND
2014-11-125810-802-0920ND
2014-11-125810-804-1100ND
2014-11-125810-801-1040ND
2015-02-095810-803-1057ND
2015-02-095810-804-1139ND
2015-02-095810-802-0905ND
2015-02-095810-801-1122ND
2015-05-125810-804-1537ND
2015-05-125810-803-1516ND
2015-05-125810-801-1525ND
2015-05-125810-802-1506ND
2015-08-115810-801-1119ND
2015-08-115810-804-1130ND
2015-08-115810-802-1159ND
2015-08-115810-803-1045ND
2015-11-095810-801-1242ND
2015-11-095810-804-1218ND
2015-11-095810-802-1313ND
2015-11-095810-803-1324ND
2016-02-095810-801-1105ND
2016-02-095810-804-1154ND
2016-02-095810-802-1357ND
2016-02-095810-803-1008ND
2016-05-095810-802-0853ND
2016-05-095810-801-0930ND
2016-05-095810-804-0943ND
2016-05-095810-803-1000ND
2016-08-085810-803-1359ND
2016-08-085810-804-1416ND
2016-08-085810-802-1340ND
2016-08-085810-801-1319ND
2016-11-165810-801-0905ND
2016-11-165810-802-0948ND
2016-11-165810-803-0922ND
2016-11-165810-804-0938ND
2017-02-145810-803-1311ND
2017-02-145810-801-1149ND
2017-02-145810-802-1417ND
2017-02-145810-804-1324ND
2017-05-085810-803-1122ND
2017-05-085810-802-1103ND
2017-05-085810-801-1136ND
2017-05-085810-804-1152ND
2017-08-145810-801-1700ND
2017-08-145810-804-1724ND
2017-08-145810-802-1753ND
2017-08-145810-803-1639ND
2017-11-135810-801-1155ND
2017-11-135810-803-1005ND
2017-11-135810-804-1135ND
2017-11-135810-802-1118ND
2018-02-125810-802-1133ND
2018-02-125810-804-0945ND
2018-02-125810-803-0920ND
2018-02-125810-801-1119ND
2018-05-145810-802-1400ND
2018-05-145810-804-1315ND
2018-05-145810-803-1348ND
2018-05-145810-801-1156ND
2018-08-145810-804-1041ND
2018-08-145810-803-1030ND
2018-08-145810-802-1001ND
2018-08-145810-801-1130ND
2018-11-145810-801-1118ND
2018-11-145810-803-1152ND
2018-11-145810-804-1141ND
2018-11-145810-802-1200ND
2019-02-115810-801-1046ND
2019-02-115810-804-1032ND
2019-02-115810-803-1019ND
2019-02-115810-802-1101ND
2019-08-205810-801-1142ND
2019-08-205810-803-1418ND