Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochloroacetic acid

Forest Water Supply Corporation

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20131.88 ppb53ND - 3.90 ppb
20144.83 ppb884.00 ppb - 6.40 ppb
20154.31 ppb86ND - 7.60 ppb
20162.24 ppb84ND - 7.10 ppb
20170.200 ppb81ND - 1.60 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
2012-01-241201555004ND
2012-06-211206764002ND
2012-08-071208338002ND
2012-10-111210447002ND
2013-03-0613032030032.50 ppb
2013-04-0213041310023.00 ppb
2013-07-16Q13038490013.90 ppb
2013-10-22Q1309171002ND
2013-10-22Q1309171001ND
2014-03-06Q14072350034.30 ppb
2014-03-06Q14072350044.00 ppb
2014-05-30Q14186000025.50 ppb
2014-05-30Q14186000016.40 ppb
2014-09-09Q14426920024.30 ppb
2014-09-09Q14426920014.10 ppb
2014-11-06Q14551360015.00 ppb
2014-11-06Q14551360025.00 ppb
2015-02-05Q15047090023.60 ppb
2015-02-05Q15047090015.10 ppb
2015-06-08Q15207760026.00 ppb
2015-06-08Q15207760015.40 ppb
2015-09-01Q15335900027.60 ppb
2015-09-01Q15335900016.80 ppb
2015-12-04Q1548414002ND
2015-12-04Q1548414001ND
2016-03-03Q16091180022.30 ppb
2016-03-03Q16091180012.20 ppb
2016-06-24Q1625931002ND
2016-06-24Q1625931001ND
2016-09-09Q1636792001ND
2016-09-09Q1636792002ND
2016-10-21Q16451590037.10 ppb
2016-10-21Q16451590086.30 ppb
2017-03-01Q17086450071.60 ppb
2017-03-01Q1708645006ND
2017-05-10Q1719322002ND
2017-05-10Q1719322001ND
2017-08-22Q1737569002ND
2017-08-22Q1737569001ND
2017-11-20Q1759383002ND
2017-11-20Q1759383001ND