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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

California Water Service Company - East Los Angeles

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0656 ppb321ND - 2.10 ppb
2015ND320ND
2016ND320ND
20170.213 ppb323ND - 2.60 ppb
2018ND320ND
20190.0656 ppb321ND - 2.10 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
2014-01-075810-800-1616ND
2014-01-075810-801-1510ND
2014-01-075810-802-1435ND
2014-01-075810-803-1525ND
2014-01-075810-804-1438ND
2014-01-075810-805-1358ND
2014-01-075810-806-1450ND
2014-01-075810-807-1550ND
2014-04-085810-800-1620ND
2014-04-085810-801-1420ND
2014-04-085810-802-1330ND
2014-04-085810-803-1450ND
2014-04-085810-804-1539ND
2014-04-085810-805-1122ND
2014-04-085810-806-1336ND
2014-04-085810-807-1555ND
2014-07-085810-800-1240ND
2014-07-085810-801-1105ND
2014-07-085810-802-0952ND
2014-07-085810-803-1345ND
2014-07-085810-804-1320ND
2014-07-085810-805-1021ND
2014-07-085810-806-0935ND
2014-07-085810-807-1300ND
2014-10-075810-800-1341ND
2014-10-075810-801-11312.10 ppb
2014-10-075810-802-1012ND
2014-10-075810-803-1319ND
2014-10-075810-804-1301ND
2014-10-075810-805-1051ND
2014-10-075810-806-1001ND
2014-10-075810-807-1146ND
2015-01-055810-800-1428ND
2015-01-055810-801-1400ND
2015-01-055810-802-1344ND
2015-01-055810-803-1446ND
2015-01-065810-804-1452ND
2015-01-065810-805-1322ND
2015-01-065810-806-1136ND
2015-01-065810-807-1433ND
2015-04-075810-800-1452ND
2015-04-075810-801-1438ND
2015-04-075810-802-1052ND
2015-04-075810-803-1346ND
2015-04-075810-804-1333ND
2015-04-075810-805-1033ND
2015-04-075810-806-1012ND
2015-04-075810-807-1358ND
2015-07-075810-800-1322ND
2015-07-075810-801-1041ND
2015-07-075810-802-1429ND
2015-07-075810-803-1308ND
2015-07-075810-804-1255ND
2015-07-075810-805-1400ND
2015-07-075810-806-1345ND
2015-07-075810-807-1238ND
2015-10-065810-800-1528ND
2015-10-065810-801-1616ND
2015-10-065810-802-1346ND
2015-10-065810-803-1557ND
2015-10-065810-804-1548ND
2015-10-065810-805-1331ND
2015-10-065810-806-1319ND
2015-10-065810-807-1537ND
2016-01-065810-800-1440ND
2016-01-065810-801-1555ND
2016-01-065810-802-1514ND
2016-01-065810-803-1400ND
2016-01-065810-804-1425ND
2016-01-065810-805-1459ND
2016-01-065810-806-1530ND
2016-01-065810-807-1142ND
2016-04-055810-800-1452ND
2016-04-055810-801-1557ND
2016-04-055810-802-1428ND
2016-04-055810-803-1536ND
2016-04-055810-804-1522ND
2016-04-055810-805-1412ND
2016-04-055810-806-1358ND
2016-04-055810-807-1505ND
2016-07-065810-800-1154ND
2016-07-065810-801-1404ND
2016-07-065810-802-1123ND
2016-07-065810-803-1348ND
2016-07-065810-804-1327ND
2016-07-065810-805-1108ND
2016-07-065810-806-1054ND
2016-07-065810-807-1214ND
2016-10-045810-800-1437ND
2016-10-045810-801-1528ND
2016-10-045810-802-1416ND
2016-10-045810-803-1514ND
2016-10-045810-804-1502ND
2016-10-045810-805-1400ND
2016-10-045810-806-1347ND
2016-10-045810-807-1447ND
2017-01-045810-800-1057ND
2017-01-045810-801-1329ND
2017-01-045810-802-1519ND
2017-01-045810-803-1305ND
2017-01-045810-804-1057ND
2017-01-045810-805-1505ND
2017-01-045810-806-1450ND
2017-01-045810-807-1116ND
2017-04-045810-800-12452.60 ppb
2017-04-045810-801-1351ND
2017-04-045810-802-1143ND
2017-04-045810-803-13292.20 ppb
2017-04-045810-804-1316ND
2017-04-045810-805-1056ND
2017-04-045810-806-1033ND
2017-04-045810-807-12592.00 ppb
2017-07-055810-800-1148ND
2017-07-055810-801-1443ND
2017-07-055810-802-1059ND
2017-07-055810-803-1309ND
2017-07-055810-804-1331ND
2017-07-055810-805-1044ND
2017-07-055810-806-1115ND
2017-07-055810-807-1205ND
2017-10-035810-800-1220ND
2017-10-035810-801-1310ND
2017-10-035810-802-1155ND
2017-10-035810-803-1255ND
2017-10-035810-804-1245ND
2017-10-035810-805-1118ND
2017-10-035810-806-1057ND
2017-10-035810-807-1231ND
2018-01-035810-800-1212ND
2018-01-035810-801-1445ND
2018-01-035810-802-1130ND
2018-01-035810-803-1407ND
2018-01-035810-804-1425ND
2018-01-035810-805-1110ND
2018-01-035810-806-1148ND
2018-01-035810-807-1233ND
2018-04-035810-800-1303ND
2018-04-035810-801-1408ND
2018-04-035810-802-1203ND
2018-04-035810-803-1344ND
2018-04-035810-804-1332ND
2018-04-035810-805-1131ND
2018-04-035810-806-1053ND
2018-04-035810-807-1316ND
2018-07-025810-800-1318ND
2018-07-025810-801-1242ND
2018-07-025810-802-1442ND
2018-07-025810-804-1722ND
2018-07-025810-805-1624ND
2018-07-025810-806-1613ND
2018-07-025810-807-1702ND
2018-07-115810-803-1351ND
2018-10-025810-800-1122ND
2018-10-025810-801-1223ND
2018-10-025810-802-1103ND
2018-10-025810-803-1200ND
2018-10-025810-804-1149ND
2018-10-025810-805-1032ND
2018-10-025810-806-1014ND
2018-10-025810-807-1134ND
2019-01-025810-800-1540ND
2019-01-025810-801-1449ND
2019-01-025810-802-1603ND
2019-01-025810-803-1528ND
2019-01-025810-804-1349ND
2019-01-025810-805-0950ND
2019-01-025810-806-0936ND
2019-01-025810-807-1125ND
2019-04-025810-800-1223ND
2019-04-025810-801-1314ND
2019-04-025810-802-1158ND
2019-04-025810-803-1258ND
2019-04-025810-804-1248ND
2019-04-025810-805-1123ND
2019-04-025810-806-1107ND
2019-04-025810-807-1234ND
2019-07-015810-800-1445ND
2019-07-015810-801-1540ND
2019-07-015810-802-1400ND
2019-07-015810-803-1523ND
2019-07-015810-804-1512ND
2019-07-015810-805-14292.10 ppb
2019-07-015810-806-1415ND
2019-07-015810-807-1456ND
2019-10-085810-800-1230ND
2019-10-085810-801-1326ND
2019-10-085810-802-1200ND
2019-10-085810-803-1307ND
2019-10-085810-804-1256ND
2019-10-085810-805-1124ND
2019-10-085810-806-1105ND
2019-10-085810-807-1241ND