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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Crescenta Valley CWD

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

 

135

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
2018ND200ND
2019ND510ND

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
2014-02-045806-800-1034ND
2014-02-045806-801-0850ND
2014-02-045806-802-1150ND
2014-02-045806-803-1020ND
2014-05-065806-008-1147ND
2014-05-065806-801-1120ND
2014-05-065806-802-1017ND
2014-05-065806-803-1200ND
2014-08-055806-800-1014ND
2014-08-055806-801-0937ND
2014-08-055806-802-1152ND
2014-08-055806-803-1120ND
2014-11-065806-800-1136ND
2014-11-065806-801-1121ND
2014-11-065806-802-1111ND
2014-11-065806-803-1150ND
2015-02-035806-800-0849ND
2015-02-035806-801-0803ND
2015-02-035806-802-0910ND
2015-02-035806-803-0858ND
2015-05-055806-800-1205ND
2015-05-055806-801-0857ND
2015-05-055806-802-1005ND
2015-05-055806-803-1155ND
2015-08-045806-800-1017ND
2015-08-045806-801-1120ND
2015-08-045806-802-1110ND
2015-08-045806-803-1002ND
2015-11-035806-800-1010ND
2015-11-035806-801-1055ND
2015-11-035806-802-1001ND
2015-11-035806-803-1028ND
2016-02-025806-800-1055ND
2016-02-025806-801-1015ND
2016-02-025806-802-1040ND
2016-02-025806-803-1040ND
2016-05-045806-800-1048ND
2016-05-045806-801-1105ND
2016-05-045806-802-1022ND
2016-05-045806-803-1033ND
2016-08-025806-800-1210ND
2016-08-025806-801-1230ND
2016-08-025806-802-1240ND
2016-08-025806-803-1158ND
2016-11-085806-800-0936ND
2016-11-085806-801-0915ND
2016-11-085806-802-0923ND
2016-11-085806-803-0951ND
2017-02-075806-800-1037ND
2017-02-075806-801-1050ND
2017-02-075806-802-1026ND
2017-02-075806-803-1020ND
2017-05-025806-800-0905ND
2017-05-025806-801-0851ND
2017-05-025806-802-1230ND
2017-05-025806-803-0920ND
2017-08-015806-800-1000ND
2017-08-015806-801-0940ND
2017-08-015806-802-1151ND
2017-08-015806-803-1015ND
2017-11-075806-800-1000ND
2017-11-075806-801-1035ND
2017-11-075806-802-1143ND
2017-11-075806-803-0940ND
2018-02-065806-800-1015ND
2018-02-065806-801-1039ND
2018-02-065806-802-0941ND
2018-02-065806-803-1000ND
2018-05-025806-800-0950ND
2018-05-025806-801-1025ND
2018-05-025806-802-1047ND
2018-05-025806-803-0930ND
2018-08-095806-800-0800ND
2018-08-095806-801-0930ND
2018-08-095806-802-1357ND
2018-08-095806-803-0815ND
2018-11-065806-800-1045ND
2018-11-065806-801-0945ND
2018-11-065806-802-1221ND
2018-11-065806-803-1100ND
2018-11-135806-800-1040ND
2018-11-135806-801-0940ND
2018-11-135806-802-1011ND
2018-11-135806-803-1230ND
2019-01-155806-800-1015ND
2019-01-155806-801-0912ND
2019-01-155806-802-0925ND
2019-01-155806-803-1000ND
2019-03-055806-800-1135ND
2019-03-055806-801-1050ND
2019-03-055806-802-1230ND
2019-03-125806-803-1103ND
2019-04-025806-800-1100ND
2019-04-025806-801-0940ND
2019-04-025806-802-1003ND
2019-04-025806-803-1040ND
2019-05-075806-800-1045ND
2019-05-075806-801-1105ND
2019-05-075806-802-1146ND
2019-05-075806-803-1005ND
2019-06-045806-800-1010ND
2019-06-045806-801-1035ND
2019-06-045806-802-1128ND
2019-06-045806-803-0950ND
2019-06-255806-028-0958ND
2019-07-025806-028-1225ND
2019-07-025806-800-0930ND
2019-07-025806-801-1015ND
2019-07-025806-802-1000ND
2019-07-025806-803-0945ND
2019-08-055806-800-1258ND
2019-08-055806-801-1225ND
2019-08-055806-802-1237ND
2019-08-055806-803-1315ND
2019-08-065806-028-1001ND
2019-09-035806-028-1240ND
2019-09-175806-800-1120ND
2019-09-175806-801-0930ND
2019-09-175806-802-1008ND
2019-09-175806-803-1057ND
2019-10-015806-028-1123ND
2019-10-155806-800-1036ND
2019-10-155806-801-1030ND
2019-10-155806-802-1020ND
2019-10-155806-803-1109ND
2019-11-045806-028-1227ND
2019-11-045806-800-1000ND
2019-11-045806-801-0915ND
2019-11-045806-802-1314ND
2019-11-045806-803-1015ND
2019-12-035806-028-1154ND
2019-12-175806-800-1027ND
2019-12-175806-801-0940ND
2019-12-175806-802-1052ND
2019-12-175806-803-1005ND