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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

California Water Service (CWS) - Selma

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-04-085810-904-1420ND
2014-04-085810-903-1440ND
2014-04-085810-902-1430ND
2014-04-085810-901-1200ND
2014-07-085810-904-1310ND
2014-07-085810-903-1340ND
2014-07-085810-902-1325ND
2014-07-085810-901-1425ND
2014-10-075810-904-1520ND
2014-10-075810-903-1406ND
2014-10-075810-902-1415ND
2014-10-075810-901-1438ND
2015-01-065810-902-1546ND
2015-01-065810-903-1534ND
2015-01-065810-904-1557ND
2015-01-065810-901-1509ND
2015-04-085810-904-1403ND
2015-04-085810-903-1342ND
2015-04-085810-902-1351ND
2015-04-085810-901-1323ND
2015-07-075810-901-1318ND
2015-07-075810-902-1217ND
2015-07-075810-903-1235ND
2015-07-075810-904-1202ND
2015-10-065810-904-1346ND
2015-10-065810-903-1421ND
2015-10-065810-901-1506ND
2015-10-065810-902-1402ND
2016-01-075810-903-1153ND
2016-01-075810-902-1203ND
2016-01-075810-904-1214ND
2016-01-075810-901-1128ND
2016-04-055810-902-1418ND
2016-04-055810-903-1438ND
2016-04-055810-901-1449ND
2016-04-055810-904-1526ND
2016-07-065810-902-1458ND
2016-07-065810-901-1546ND
2016-07-065810-903-1510ND
2016-07-065810-904-1445ND
2016-10-045810-903-1322ND
2016-10-045810-902-1333ND
2016-10-045810-901-1304ND
2016-10-045810-904-1344ND
2017-01-035810-903-1207ND
2017-01-035810-904-1305ND
2017-01-035810-902-1222ND
2017-01-035810-901-1156ND
2017-04-045810-904-1427ND
2017-04-045810-903-1449ND
2017-04-045810-902-1440ND
2017-04-045810-901-1515ND
2017-07-065810-903-1424ND
2017-07-065810-902-1441ND
2017-07-065810-904-1501ND
2017-07-065810-901-1127ND
2017-10-035810-901-1036ND
2017-10-035810-902-1322ND
2017-10-035810-904-1351ND
2017-10-035810-903-1246ND
2018-01-045810-901-0957ND
2018-01-045810-904-1218ND
2018-01-045810-902-1123ND
2018-01-045810-903-1046ND
2018-04-035810-904-1253ND
2018-04-035810-902-1242ND
2018-04-035810-903-1141ND
2018-04-035810-901-1055ND
2018-07-055810-901-1250ND
2018-07-055810-904-1432ND
2018-07-055810-902-1350ND
2018-07-055810-903-1325ND
2018-10-095810-901-1040ND
2018-10-095810-903-1138ND
2018-10-095810-904-1150ND
2018-10-095810-902-1118ND
2019-01-035810-903-1327ND
2019-01-035810-904-1616ND
2019-01-035810-901-1147ND
2019-01-035810-902-1605ND
2019-04-025810-904-1230ND
2019-04-025810-903-1135ND
2019-04-025810-902-1219ND
2019-04-095810-901-1355ND
2019-07-055810-904-1113ND
2019-07-055810-903-1056ND
2019-07-055810-902-1104ND
2019-07-055810-901-1015ND
2019-10-015810-904-1414ND
2019-10-015810-903-1229ND
2019-10-015810-901-1308ND
2019-10-015810-902-1031ND