Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Cal American Water Company

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

 

184

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
2014ND240ND
2015ND320ND
20161.01 ppb321ND - 32.3 ppb
2017ND320ND
2018ND320ND
2019ND320ND

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
2014-05-071225-006-1330ND
2014-05-071225-007-1415ND
2014-05-071225-008-0945ND
2014-05-071225-009-1510ND
2014-05-071225-010-1030ND
2014-05-071225-011-1105ND
2014-05-071225-012-1225ND
2014-05-071225-013-1150ND
2014-08-121225-006-1135ND
2014-08-121225-007-1410ND
2014-08-121225-008-1350ND
2014-08-121225-009-1425ND
2014-08-121225-010-1315ND
2014-08-121225-011-1210ND
2014-08-121225-012-1000ND
2014-08-121225-013-1055ND
2014-11-111225-006-1500ND
2014-11-111225-007-1400ND
2014-11-111225-008-1320ND
2014-11-111225-009-1430ND
2014-11-111225-010-1250ND
2014-11-111225-011-1230ND
2014-11-111225-012-1545ND
2014-11-111225-013-1520ND
2015-02-101225-006-1450ND
2015-02-101225-007-0933ND
2015-02-101225-008-1015ND
2015-02-101225-009-1515ND
2015-02-101225-010-1047ND
2015-02-101225-011-1120ND
2015-02-101225-012-1425ND
2015-02-101225-013-1350ND
2015-05-121225-006-1355ND
2015-05-121225-007-1150ND
2015-05-121225-008-1120ND
2015-05-121225-009-1420ND
2015-05-121225-010-1042ND
2015-05-121225-011-1000ND
2015-05-121225-012-1332ND
2015-05-121225-013-1300ND
2015-08-101225-006-1350ND
2015-08-101225-007-1325ND
2015-08-101225-008-1050ND
2015-08-101225-009-1410ND
2015-08-101225-010-1120ND
2015-08-101225-011-1200ND
2015-08-101225-012-0945ND
2015-08-101225-013-1015ND
2015-11-101225-006-1100ND
2015-11-101225-007-1200ND
2015-11-101225-008-1140ND
2015-11-101225-009-0930ND
2015-11-101225-010-1055ND
2015-11-101225-011-0950ND
2015-11-101225-012-1300ND
2015-11-101225-013-1200ND
2016-02-091225-006-1000ND
2016-02-091225-007-1150ND
2016-02-091225-008-0950ND
2016-02-091225-009-1210ND
2016-02-091225-010-1035ND
2016-02-091225-011-1120ND
2016-02-091225-012-1040ND
2016-02-091225-013-1305ND
2016-05-101225-006-0930ND
2016-05-101225-007-1030ND
2016-05-101225-008-0950ND
2016-05-101225-009-1155ND
2016-05-101225-010-1030ND
2016-05-101225-011-1055ND
2016-05-101225-012-1130ND
2016-05-101225-013-1100ND
2016-08-091225-006-1130ND
2016-08-091225-007-1100ND
2016-08-091225-008-1045ND
2016-08-091225-009-1000ND
2016-08-091225-010-1120ND
2016-08-091225-011-0950ND
2016-08-091225-012-1300ND
2016-08-091225-013-1208ND
2016-11-091225-006-1200ND
2016-11-091225-007-1445ND
2016-11-091225-008-1355ND
2016-11-091225-009-1315ND
2016-11-091225-010-1340ND
2016-11-091225-012-1045ND
2016-11-091225-013-1130ND
2016-11-111225-011-101032.3 ppb
2017-02-081225-006-1000ND
2017-02-081225-007-1300ND
2017-02-081225-008-1040ND
2017-02-081225-009-1050ND
2017-02-081225-010-1100ND
2017-02-081225-011-1200ND
2017-02-081225-012-1100ND
2017-02-081225-013-1315ND
2017-05-091225-006-1110ND
2017-05-091225-007-1330ND
2017-05-091225-008-1300ND
2017-05-091225-009-1200ND
2017-05-091225-010-1150ND
2017-05-091225-011-1115ND
2017-05-091225-012-1030ND
2017-05-091225-013-1030ND
2017-08-081225-006-1100ND
2017-08-081225-007-1130ND
2017-08-081225-008-1300ND
2017-08-081225-009-1030ND
2017-08-081225-010-1145ND
2017-08-081225-011-1100ND
2017-08-081225-012-1200ND
2017-08-081225-013-1000ND
2017-11-091225-006-1245ND
2017-11-091225-007-1435ND
2017-11-091225-008-1409ND
2017-11-091225-009-1300ND
2017-11-091225-010-1352ND
2017-11-091225-011-1337ND
2017-11-091225-012-1317ND
2017-11-091225-013-1315ND
2018-02-061225-006-1000ND
2018-02-061225-007-1100ND
2018-02-061225-008-1130ND
2018-02-061225-009-1030ND
2018-02-061225-010-1100ND
2018-02-061225-011-1200ND
2018-02-061225-012-1200ND
2018-02-061225-013-1015ND
2018-05-081225-006-0900ND
2018-05-081225-007-1100ND
2018-05-081225-008-1100ND
2018-05-081225-009-0930ND
2018-05-081225-010-1040ND
2018-05-081225-011-1012ND
2018-05-081225-012-1130ND
2018-05-081225-013-0950ND
2018-08-081225-006-1030ND
2018-08-081225-007-1130ND
2018-08-081225-008-1110ND
2018-08-081225-009-1100ND
2018-08-081225-010-1135ND
2018-08-081225-011-1155ND
2018-08-081225-012-1300ND
2018-08-081225-013-1040ND
2018-11-141225-006-1355ND
2018-11-141225-007-1455ND
2018-11-141225-008-1520ND
2018-11-141225-009-1425ND
2018-11-141225-010-1540ND
2018-11-141225-011-1555ND
2018-11-141225-012-1250ND
2018-11-141225-013-1320ND
2019-02-121225-006-1400ND
2019-02-121225-007-1500ND
2019-02-121225-008-1420ND
2019-02-121225-009-1430ND
2019-02-121225-010-1500ND
2019-02-121225-011-1440ND
2019-02-121225-012-1600ND
2019-02-121225-013-1600ND
2019-05-141225-006-1230ND
2019-05-141225-007-1330ND
2019-05-141225-008-1600ND
2019-05-141225-009-1300ND
2019-05-141225-010-1630ND
2019-05-141225-011-1530ND
2019-05-141225-012-1430ND
2019-05-141225-013-1400ND
2019-08-141225-006-1200ND
2019-08-141225-007-1300ND
2019-08-141225-008-1350ND
2019-08-141225-009-1230ND
2019-08-141225-010-1330ND
2019-08-141225-011-1300ND
2019-08-141225-012-1400ND
2019-08-141225-013-1230ND
2019-11-131225-006-1615ND
2019-11-131225-007-1749ND
2019-11-131225-009-1645ND
2019-11-131225-010-1707ND
2019-11-131225-011-1725ND
2019-11-131225-012-1409ND
2019-11-131225-013-1510ND
2019-11-211225-008-1108ND