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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Coastside County Water District

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
20140.288 ppb162ND - 2.40 ppb
20150.444 ppb163ND - 2.60 ppb
20160.131 ppb161ND - 2.10 ppb
2017ND160ND
20180.344 ppb162ND - 2.90 ppb
20190.156 ppb161ND - 2.50 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
2014-02-125810-902-1230ND
2014-02-125810-900-1155ND
2014-02-125810-901-1137ND
2014-02-125810-903-1212ND
2014-05-145810-903-0914ND
2014-05-145810-902-0852ND
2014-05-145810-901-1005ND
2014-05-145810-900-0934ND
2014-08-135810-903-1133ND
2014-08-135810-902-1210ND
2014-08-135810-901-11232.20 ppb
2014-08-135810-900-11432.40 ppb
2014-11-185810-902-0934ND
2014-11-185810-901-1045ND
2014-11-185810-903-1015ND
2014-11-185810-900-1000ND
2015-02-255810-903-1200ND
2015-02-255810-902-1120ND
2015-02-255810-901-12152.10 ppb
2015-02-255810-900-11452.60 ppb
2015-05-275810-903-10072.40 ppb
2015-05-275810-902-1028ND
2015-05-275810-900-0952ND
2015-05-275810-901-0936ND
2015-08-195810-900-0944ND
2015-08-195810-903-1002ND
2015-08-195810-902-0915ND
2015-08-195810-901-1022ND
2015-11-185810-901-0930ND
2015-11-185810-900-0904ND
2015-11-185810-903-0916ND
2015-11-185810-902-0835ND
2016-02-235810-901-1105ND
2016-02-235810-900-10152.10 ppb
2016-02-235810-903-1040ND
2016-02-235810-902-0920ND
2016-05-185810-901-0910ND
2016-05-185810-900-0930ND
2016-05-185810-903-0850ND
2016-05-185810-902-1125ND
2016-08-225810-903-1007ND
2016-08-225810-901-1029ND
2016-08-225810-900-1125ND
2016-08-225810-902-0936ND
2016-11-165810-903-0935ND
2016-11-165810-901-0945ND
2016-11-165810-902-0945ND
2016-11-165810-900-0910ND
2017-02-145810-902-0821ND
2017-02-145810-903-1010ND
2017-02-145810-901-1030ND
2017-02-145810-900-0946ND
2017-05-175810-902-1020ND
2017-05-175810-900-0834ND
2017-05-175810-901-0925ND
2017-05-175810-903-0901ND
2017-08-165810-900-1004ND
2017-08-165810-901-1024ND
2017-08-165810-903-0929ND
2017-08-165810-902-0903ND
2017-11-155810-903-1006ND
2017-11-155810-900-0949ND
2017-11-155810-902-0919ND
2017-11-155810-901-1025ND
2018-02-285810-903-1007ND
2018-02-285810-900-1023ND
2018-02-285810-901-0917ND
2018-02-285810-902-0844ND
2018-05-155810-901-0945ND
2018-05-155810-902-1110ND
2018-05-155810-903-1034ND
2018-05-155810-900-1008ND
2018-08-155810-901-1117ND
2018-08-155810-903-1131ND
2018-08-155810-902-1046ND
2018-08-155810-900-1145ND
2018-11-135810-901-1122ND
2018-11-135810-903-1137ND
2018-11-135810-902-10442.60 ppb
2018-11-135810-900-11512.90 ppb
2019-02-205810-900-1453ND
2019-02-205810-902-1348ND
2019-02-205810-901-1420ND
2019-02-205810-903-1436ND
2019-05-165810-900-14082.50 ppb
2019-05-165810-902-1340ND
2019-05-165810-903-1428ND
2019-05-165810-901-1452ND
2019-08-285810-903-1412ND
2019-08-285810-902-1137ND
2019-08-285810-900-1400ND
2019-08-285810-901-1427ND
2019-11-135810-903-0855ND
2019-11-135810-902-1020ND
2019-11-135810-900-0840ND
2019-11-135810-901-0912ND