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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Valley Center MWD

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.

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND160ND
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND

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
2012-05-159469-903-1040ND
2012-05-159469-902-0945ND
2012-05-159469-901-0915ND
2012-05-159469-900-1010ND
2012-08-149469-900-1125ND
2012-08-149469-903-1250ND
2012-08-149469-902-1115ND
2012-08-149469-901-1140ND
2012-11-139469-903-1200ND
2012-11-139469-900-1020ND
2012-11-139469-901-0855ND
2012-11-139469-902-0940ND
2013-02-049469-900-1033ND
2013-02-149469-901-1000ND
2013-02-149469-902-0927ND
2013-02-149469-903-1100ND
2013-05-159469-901-1255ND
2013-05-159469-902-1050ND
2013-05-159469-900-1215ND
2013-05-159469-903-1437ND
2013-08-139469-902-0905ND
2013-08-139469-901-0930ND
2013-08-139469-903-1045ND
2013-08-139469-900-1005ND
2013-11-139469-902-0925ND
2013-11-139469-901-0955ND
2013-11-139469-900-1040ND
2013-11-139469-903-1110ND
2014-02-119469-901-0920ND
2014-02-119469-900-1000ND
2014-02-119469-903-1035ND
2014-02-119469-902-0850ND
2014-05-139469-902-0930ND
2014-05-139469-900-1030ND
2014-05-139469-903-1100ND
2014-05-139469-901-0956ND
2014-08-129469-902-0905ND
2014-08-129469-900-0935ND
2014-08-129469-901-0835ND
2014-08-129469-903-1000ND
2014-11-129469-900-1010ND
2014-11-129469-901-0907ND
2014-11-129469-902-0940ND
2014-11-129469-903-1055ND
2015-03-034792-902-1028ND
2015-03-034792-901-1100ND
2015-03-034792-903-1028ND
2015-03-034792-900-1135ND
2015-05-075810-902-0805ND
2015-05-075810-900-0910ND
2015-05-075810-901-0840ND
2015-05-075810-903-1040ND
2015-08-105810-901-1050ND
2015-08-105810-902-1050ND
2015-08-105810-900-1125ND
2015-08-105810-903-1210ND
2015-11-091677-900-1055ND
2015-11-095810-901-1020ND
2015-11-091677-903-1215ND
2015-11-095810-902-0925ND
2016-02-179588-901-0930ND
2016-02-179588-903-1045ND
2016-02-179588-902-0900ND
2016-02-179588-900-1015ND
2016-05-113761-901-1030ND
2016-05-113761-903-0930ND
2016-05-113761-900-0900ND
2016-05-113761-902-1000ND
2016-08-083761-903-1230ND
2016-08-083761-902-0925ND
2016-08-083761-900-1110ND
2016-08-083761-901-1015ND
2016-11-093761-903-1015ND
2016-11-093761-901-0905ND
2016-11-093761-902-0837ND
2016-11-093761-900-0942ND
2017-02-083761-901-1130ND
2017-02-083761-900-1020ND
2017-02-093761-903-0945ND
2017-02-093761-902-1100ND
2017-05-023761-900-1050ND
2017-05-023761-902-0940ND
2017-05-023761-903-1125ND
2017-05-023761-901-1006ND
2017-08-093761-901-0940ND
2017-08-093761-903-1055ND
2017-08-093761-902-1145ND
2017-08-093761-900-1025ND
2017-11-073761-902-0823ND
2017-11-073761-903-1032ND
2017-11-073761-901-0859ND
2017-11-073761-900-0942ND