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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Danville

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

 

110

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.370 ppb235ND - 2.30 ppb
20150.435 ppb235ND - 2.70 ppb
20161.16 ppb168ND - 3.80 ppb
20171.18 ppb1611ND - 2.60 ppb
20180.963 ppb166ND - 3.40 ppb
20190.304 ppb163ND - 1.79 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
2014-02-04E140100268ND
2014-02-04E140100280ND
2014-02-04E140100264ND
2014-02-04E140100281ND
2014-05-05E1403073572.30 ppb
2014-05-05E1403073682.00 ppb
2014-05-05E1403073661.70 ppb
2014-05-05E1403073581.40 ppb
2014-08-05E140608596ND
2014-08-05E140608605ND
2014-08-05E140608603ND
2014-08-05E140608614ND
2014-09-03E1406084141.10 ppb
2014-09-03E140608418ND
2014-10-07E140608415ND
2014-10-07E140608419ND
2014-11-05E140903225ND
2014-11-05E140903238ND
2014-11-05E140903233ND
2014-11-05E140903226ND
2014-11-05E141000326ND
2014-12-01E141000328ND
2014-12-01E141000322ND
2015-01-05VA010-DCLSND
2015-01-05VA010-DCLSND
2015-02-01VA010-DCLS1.000 ppb
2015-02-01VA010-DCLSND
2015-02-01VA010-DCLSND
2015-02-01VA010-DCLSND
2015-02-01VA010-DCLSND
2015-03-09VA010-DCLSND
2015-03-09VA010-DCLSND
2015-04-15VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-08-03VA010-DCLS2.70 ppb
2015-08-03VA010-DCLS2.30 ppb
2015-08-03VA010-DCLS2.20 ppb
2015-08-03VA010-DCLSND
2015-11-04VA010-DCLS1.80 ppb
2015-11-04VA010-DCLSND
2015-11-04VA010-DCLSND
2015-11-04VA010-DCLSND
2016-02-02E1512031911.20 ppb
2016-02-02E151203193ND
2016-02-02E151203198ND
2016-02-02E151203183ND
2016-05-04E1603035062.00 ppb
2016-05-04E1603035201.60 ppb
2016-05-04E1603035081.40 ppb
2016-05-04E160303504ND
2016-08-10E1608012313.60 ppb
2016-08-10E1608012303.40 ppb
2016-08-10E160801233ND
2016-08-10E160801232ND
2016-11-02E1608043603.80 ppb
2016-11-02E1608043651.60 ppb
2016-11-02E160804364ND
2016-11-02E160804352ND
2017-02-06E1611034582.00 ppb
2017-02-06E1611034521.90 ppb
2017-02-06E1611034531.50 ppb
2017-02-06E1611034591.000 ppb
2017-05-02E1702031832.40 ppb
2017-05-02E1702031741.20 ppb
2017-05-02E170203173ND
2017-05-02E170203179ND
2017-08-01E1706024262.60 ppb
2017-08-01E1706024321.30 ppb
2017-08-01E1706024311.10 ppb
2017-08-01E170602430ND
2017-11-07E1709003042.40 ppb
2017-11-07E1709003101.40 ppb
2017-11-07E170900311ND
2017-11-07E170900305ND
2018-02-06E171202540ND
2018-02-06E171202542ND
2018-02-06E171202544ND
2018-02-06E171202546ND
2018-05-01E180305947ND
2018-05-01E1803059622.10 ppb
2018-05-01E1803059642.00 ppb
2018-05-01E1803059661.60 ppb
2018-08-06E1806007883.30 ppb
2018-08-06E1806007903.00 ppb
2018-08-06E180600792ND
2018-08-06E1806007943.40 ppb
2018-11-06E181000963ND
2018-11-06E181000965ND
2018-11-06E181000967ND
2018-11-06E181000969ND
2019-02-05E181202417ND
2019-02-05E181202421ND
2019-02-05E181202427ND
2019-02-05E181202432ND
2019-05-07E190302346ND
2019-05-07E190302350ND
2019-05-07E190302359ND
2019-05-07E1903023611.30 ppb
2019-08-0519081240-01AND
2019-08-0519081240-02A1.78 ppb
2019-08-0519081240-03AND
2019-08-0519081240-04A1.79 ppb
2019-11-0592452346005ND
2019-11-0592452346007ND
2019-11-0592452346008ND
2019-11-0592452346011ND