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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of San Clemente

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

 

87

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
2018ND150ND
2019ND80ND

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
2014-02-121805-803-1312ND
2014-02-121805-801-1134ND
2014-02-121805-802-1052ND
2014-02-121805-804-1337ND
2014-05-131805-804-1159ND
2014-05-131805-803-1239ND
2014-05-131805-802-1001ND
2014-05-131805-801-1048ND
2014-08-121805-804-1321ND
2014-08-121805-803-1253ND
2014-08-121805-802-1017ND
2014-08-121805-801-1032ND
2014-11-121805-803-1449ND
2014-11-121805-802-1324ND
2014-11-121805-804-1639ND
2014-11-121805-801-1350ND
2015-02-101805-803-1417ND
2015-02-101805-804-1437ND
2015-02-101805-802-1051ND
2015-02-101805-801-1335ND
2015-05-111805-804-1153ND
2015-05-111805-803-1133ND
2015-05-111805-801-1052ND
2015-05-111805-802-1037ND
2015-08-101805-804-1457ND
2015-08-101805-801-1220ND
2015-08-101805-802-1230ND
2015-08-101805-803-1420ND
2015-11-091805-801-1206ND
2015-11-091805-802-1127ND
2015-11-091805-804-1437ND
2015-11-091805-803-1402ND
2016-02-091805-802-1114ND
2016-02-091805-803-1321ND
2016-02-091805-804-1409ND
2016-02-091805-801-1130ND
2016-05-101805-802-1040ND
2016-05-101805-801-1057ND
2016-05-101805-803-1307ND
2016-05-101805-804-1330ND
2016-08-091805-801-1119ND
2016-08-091805-804-1341ND
2016-08-091805-803-1421ND
2016-08-091805-802-1051ND
2016-11-081805-801-1059ND
2016-11-081805-804-1341ND
2016-11-081805-802-1032ND
2016-11-081805-803-1309ND
2017-02-071805-802-1121ND
2017-02-071805-801-1142ND
2017-02-071805-804-1419ND
2017-02-071805-803-1339ND
2017-05-091805-804-1409ND
2017-05-091805-802-1049ND
2017-05-091805-801-1102ND
2017-05-091805-803-1449ND
2017-08-081805-802-1114ND
2017-08-081805-801-1457ND
2017-08-081805-804-1257ND
2017-08-081805-803-1234ND
2017-11-071805-803-1435ND
2017-11-071805-804-1457ND
2017-11-071805-802-1227ND
2017-11-071805-801-1352ND
2018-02-061805-802-1015ND
2018-02-061805-804-1237ND
2018-02-061805-801-1038ND
2018-02-061805-803-1212ND
2018-05-081805-803-1101ND
2018-05-081805-802-1239ND
2018-05-081805-801-1129ND
2018-05-081805-804-1011ND
2018-08-071805-801-0940ND
2018-08-071805-804-1055ND
2018-08-071805-802-0958ND
2018-08-071805-803-1033ND
2018-11-061805-804-1202ND
2018-11-061805-802-1023ND
2018-11-061805-803-1150ND
2019-08-061805-801-1012ND
2019-08-061805-804-1142ND
2019-08-061805-802-0957ND
2019-08-061805-803-1114ND
2019-11-051805-804-1134ND
2019-11-051805-801-1002ND
2019-11-051805-802-0943ND
2019-11-051805-803-1110ND