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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Morro Bay PW Department - Water Division

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

 

96

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
20160.375 ppb163ND - 2.00 ppb
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
2014-01-075867-041-1036ND
2014-01-075867-039-1028ND
2014-01-075867-040-1019ND
2014-01-075867-042-1006ND
2014-04-015867-042-1022ND
2014-04-015867-041-1051ND
2014-04-015867-040-1034ND
2014-04-015867-039-1044ND
2014-07-015867-042-0852ND
2014-07-015867-041-0810ND
2014-07-015867-040-0833ND
2014-07-015867-039-0820ND
2014-10-075867-041-1020ND
2014-10-075867-040-1000ND
2014-10-075867-042-0934ND
2014-10-075867-039-1012ND
2015-01-065867-042-0825ND
2015-01-065867-041-0955ND
2015-01-065867-040-0942ND
2015-01-065867-039-0805ND
2015-04-075867-042-0855ND
2015-04-075867-041-0921ND
2015-04-075867-039-0758ND
2015-04-075867-040-0910ND
2015-07-075867-039-0828ND
2015-07-075867-042-0935ND
2015-07-075867-041-0852ND
2015-07-075867-040-0839ND
2015-10-075867-040-0829ND
2015-10-075867-039-0820ND
2015-10-075867-042-0900ND
2015-10-075867-041-0840ND
2016-01-045867-040-0925ND
2016-01-045867-039-0935ND
2016-01-045867-042-0845ND
2016-01-045867-041-0941ND
2016-04-055867-040-09132.00 ppb
2016-04-055867-039-09052.00 ppb
2016-04-055867-042-08292.00 ppb
2016-04-055867-041-0859ND
2016-07-055867-042-0907ND
2016-07-055867-040-0835ND
2016-07-055867-039-0823ND
2016-07-055867-041-0810ND
2016-10-045867-042-0933ND
2016-10-045867-040-0915ND
2016-10-045867-041-0859ND
2016-10-045867-039-0906ND
2017-01-035867-041-0856ND
2017-01-035867-042-0822ND
2017-01-035867-040-0916ND
2017-01-035867-039-0906ND
2017-04-045867-041-0916ND
2017-04-045867-039-0851ND
2017-04-045867-040-0902ND
2017-04-045867-042-0816ND
2017-07-115867-039-0903ND
2017-07-115867-040-0912ND
2017-07-115867-042-0930ND
2017-07-115867-041-0855ND
2017-10-035867-042-0750ND
2017-10-035867-039-0733ND
2017-10-035867-041-0900ND
2017-10-035867-040-0913ND
2018-01-025867-042-0900ND
2018-01-025867-039-0833ND
2018-01-025867-040-0845ND
2018-01-025867-041-0825ND
2018-04-035867-040-0950ND
2018-04-035867-041-1007ND
2018-04-035867-042-1016ND
2018-04-035867-039-1000ND
2018-07-105867-040-0922ND
2018-07-105867-042-0934ND
2018-07-105867-041-0905ND
2018-07-105867-039-0915ND
2018-10-025867-040-0935ND
2018-10-025867-042-0957ND
2018-10-025867-041-0914ND
2018-10-025867-039-0923ND
2019-01-025867-039-0848ND
2019-01-025867-041-0901ND
2019-01-025867-040-0915ND
2019-01-025867-042-0955ND
2019-04-025867-039-0859ND
2019-04-025867-041-0827ND
2019-04-025867-042-1047ND
2019-04-025867-040-0844ND
2019-07-019588-042-1035ND
2019-07-019588-041-1008ND
2019-07-019588-039-0920ND
2019-07-019588-040-0940ND
2019-10-015867-042-1030ND
2019-10-015867-041-0940ND
2019-10-015867-039-0805ND
2019-10-015867-040-1000ND