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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Castaic Lake Water Agency

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

 

191

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND310ND
2015ND320ND
2016ND320ND
2017ND320ND
2018ND320ND
20190.209 ppb321ND - 6.70 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
2014-01-139590-805-1105ND
2014-01-139590-807-1240ND
2014-01-149590-800-0950ND
2014-01-149590-801-1045ND
2014-01-149590-809-1010ND
2014-01-159590-802-1005ND
2014-01-159590-804-0930ND
2014-01-159590-806-1025ND
2014-04-149590-805-1230ND
2014-04-149590-807-1335ND
2014-04-159590-800-1040ND
2014-04-159590-801-1105ND
2014-04-169590-802-1205ND
2014-04-169590-804-1055ND
2014-04-169590-806-1225ND
2014-07-149590-805-1205ND
2014-07-149590-807-1330ND
2014-07-159590-800-1030ND
2014-07-159590-801-1115ND
2014-07-159590-809-1100ND
2014-07-169590-802-1200ND
2014-07-169590-804-1045ND
2014-07-169590-806-1230ND
2014-10-149590-800-1040ND
2014-10-149590-801-1125ND
2014-10-149590-809-1100ND
2014-10-159590-802-1100ND
2014-10-159590-804-1020ND
2014-10-159590-806-1125ND
2014-10-169590-805-1050ND
2014-10-169590-807-1300ND
2015-01-129588-805-1055ND
2015-01-129588-807-1305ND
2015-01-139588-800-1015ND
2015-01-139588-801-1150ND
2015-01-139588-809-1040ND
2015-01-149588-802-1105ND
2015-01-149588-804-1020ND
2015-01-149588-806-1130ND
2015-04-139590-805-1130ND
2015-04-139590-807-1305ND
2015-04-149590-800-1055ND
2015-04-149590-801-1135ND
2015-04-149590-809-1115ND
2015-04-159590-802-1220ND
2015-04-159590-804-1100ND
2015-04-159590-806-1255ND
2015-07-159590-802-0815ND
2015-07-159590-804-0735ND
2015-07-159590-806-0835ND
2015-07-169590-805-1015ND
2015-07-169590-807-1255ND
2015-07-179590-800-0945ND
2015-07-179590-801-1010ND
2015-07-179590-809-0955ND
2015-10-139590-800-1020ND
2015-10-139590-801-1110ND
2015-10-139590-806-1135ND
2015-10-139590-809-1050ND
2015-10-149590-802-1110ND
2015-10-149590-804-1030ND
2015-10-159590-805-1020ND
2015-10-159590-807-1250ND
2016-02-089590-805-1250ND
2016-02-089590-807-1435ND
2016-02-099590-800-1020ND
2016-02-099590-801-1105ND
2016-02-099590-809-1045ND
2016-02-109590-802-1055ND
2016-02-109590-804-1015ND
2016-02-109590-806-1120ND
2016-04-119590-805-1225ND
2016-04-119590-807-1405ND
2016-04-129590-800-1040ND
2016-04-129590-801-1120ND
2016-04-129590-809-1100ND
2016-04-139590-802-0805ND
2016-04-139590-804-0735ND
2016-04-139590-806-0855ND
2016-07-119590-011-0925ND
2016-07-119590-807-1110ND
2016-07-129590-800-0930ND
2016-07-129590-801-1030ND
2016-07-129590-809-0955ND
2016-07-139590-802-1045ND
2016-07-139590-804-1010ND
2016-07-139590-806-1110ND
2016-10-109590-805-1155ND
2016-10-109590-807-1340ND
2016-10-119590-800-1030ND
2016-10-119590-801-1120ND
2016-10-119590-809-1055ND
2016-10-129590-802-1130ND
2016-10-129590-804-1045ND
2016-10-129590-806-1200ND
2017-01-109590-800-1020ND
2017-01-109590-801-1110ND
2017-01-109590-809-1035ND
2017-01-119590-802-1235ND
2017-01-119590-804-1150ND
2017-01-119590-806-1305ND
2017-01-129590-805-1200ND
2017-01-129590-807-1430ND
2017-04-109590-805-1145ND
2017-04-109590-807-1340ND
2017-04-119590-800-1050ND
2017-04-119590-801-1135ND
2017-04-119590-803-1120ND
2017-04-129590-802-1100ND
2017-04-129590-804-1015ND
2017-04-129590-806-1130ND
2017-07-109590-805-1235ND
2017-07-109590-807-1425ND
2017-07-119590-800-1015ND
2017-07-119590-801-1100ND
2017-07-119590-809-1035ND
2017-07-129590-802-0845ND
2017-07-129590-804-0805ND
2017-07-129590-806-0900ND
2017-10-109590-800-1025ND
2017-10-109590-801-1105ND
2017-10-109590-809-1045ND
2017-10-119590-802-1005ND
2017-10-119590-804-0935ND
2017-10-119590-806-1025ND
2017-10-129590-805-1030ND
2017-10-129590-807-1255ND
2018-01-099590-800-1045ND
2018-01-099590-801-1120ND
2018-01-099590-809-1100ND
2018-01-109590-802-1055ND
2018-01-109590-804-1010ND
2018-01-109590-806-1115ND
2018-01-119590-805-1205ND
2018-01-119590-807-1420ND
2018-04-099590-805-1210ND
2018-04-099590-807-1415ND
2018-04-109590-800-1000ND
2018-04-109590-801-1040ND
2018-04-109590-803-1020ND
2018-04-119590-802-1140ND
2018-04-119590-804-1045ND
2018-04-119590-806-1210ND
2018-07-099590-805-1020ND
2018-07-099590-807-1310ND
2018-07-109590-800-1015ND
2018-07-109590-801-1055ND
2018-07-109590-809-1040ND
2018-07-119590-802-1220ND
2018-07-119590-804-1040ND
2018-07-119590-806-1245ND
2018-10-089590-805-1225ND
2018-10-089590-807-1420ND
2018-10-099590-800-1010ND
2018-10-099590-801-1100ND
2018-10-099590-803-1040ND
2018-10-109590-802-1050ND
2018-10-109590-804-1015ND
2018-10-109590-806-1125ND
2019-01-149590-805-12006.70 ppb
2019-01-149590-807-1355ND
2019-01-159590-800-1000ND
2019-01-159590-801-1055ND
2019-01-159590-809-1035ND
2019-01-169590-802-1110ND
2019-01-169590-804-1030ND
2019-01-169590-806-1150ND
2019-04-089590-805-1150ND
2019-04-089590-807-1350ND
2019-04-099590-800-1010ND
2019-04-099590-801-1050ND
2019-04-099590-809-1035ND
2019-04-109590-802-1035ND
2019-04-109590-804-0955ND
2019-04-109590-806-1105ND
2019-07-089590-805-1230ND
2019-07-089590-807-1405ND
2019-07-099590-800-1000ND
2019-07-099590-801-1055ND
2019-07-099590-809-1030ND
2019-07-109590-802-1120ND
2019-07-109590-804-1045ND
2019-07-109590-806-1155ND
2019-10-149590-805-1210ND
2019-10-149590-807-1400ND
2019-10-159590-800-1055ND
2019-10-159590-801-1140ND
2019-10-159590-809-1120ND
2019-10-169590-802-1130ND
2019-10-169590-804-1055ND
2019-10-169590-806-1210ND