Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Belmont Waterworks Inc.

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND120ND
2016ND160ND
20170.763 ppb166ND - 2.70 ppb
2018ND160ND
20190.300 ppb162ND - 2.40 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
2014-05-21L004390-02ND
2014-05-21L004390-01ND
2014-05-21L004390-02ND
2014-05-21L004390-01ND
2014-08-20L0047072-01ND
2014-08-20L0047072-02ND
2014-08-20L0047072-02ND
2014-08-20L0047072-01ND
2014-11-19L0050942-01ND
2014-11-19L0050942-02ND
2014-11-19L0050942-02ND
2014-11-19L0050942-01ND
2015-05-17LA7529-1ND
2015-05-17LA7529-2ND
2015-05-17LA7529-2ND
2015-05-17LA7529-1ND
2015-08-1835203743001ND
2015-08-1835203743002ND
2015-08-1835203743002ND
2015-08-1835203743001ND
2015-11-1235216541001ND
2015-11-1235216541002ND
2015-11-1235216541002ND
2015-11-1235216541001ND
2016-02-1135229575001ND
2016-02-1135229575002ND
2016-02-1135229575001ND
2016-02-1135229575002ND
2016-05-11352444481001ND
2016-05-1135244481002ND
2016-05-11352444481001ND
2016-05-1135244481002ND
2016-08-1835260956001ND
2016-08-1835260956002ND
2016-08-1835260956001ND
2016-08-1835260956002ND
2016-11-0735276368002ND
2016-11-0735276368001ND
2016-11-0735276368002ND
2016-11-0735276368001ND
2017-02-2035296880016ND
2017-02-2035296880015ND
2017-02-2035296880015ND
2017-02-2035296880016ND
2017-05-1535313429017ND
2017-05-1535313429018ND
2017-05-1535313429018ND
2017-05-1535313429017ND
2017-08-01353283620161.000 ppb
2017-08-0135328362015ND
2017-08-01353283620161.000 ppb
2017-08-0135328362015ND
2017-11-07353471980012.70 ppb
2017-11-07353471980022.40 ppb
2017-11-07353471980022.40 ppb
2017-11-07353471980012.70 ppb
2018-02-2235376447001ND
2018-02-2235376447002ND
2018-02-2235376447001ND
2018-02-2235376447002ND
2018-05-0135389934001ND
2018-05-0135389934002ND
2018-05-0135389934001ND
2018-05-0135389934002ND
2018-08-0635409565001ND
2018-08-0635409565002ND
2018-08-0635409565001ND
2018-08-0635409565002ND
2018-11-2635433607001ND
2018-11-2635433607002ND
2018-11-2635433607001ND
2018-11-2635433607002ND
2019-02-1335448505002ND
2019-02-1335448505001ND
2019-02-1335448505001ND
2019-02-1335448505002ND
2019-05-1335469005002ND
2019-05-1335469005002ND
2019-05-13354690050012.40 ppb
2019-05-13354690050012.40 ppb
2019-08-1435490879002ND
2019-08-1435490879001ND
2019-08-1435490879001ND
2019-08-1435490879002ND
2019-11-1335512659001ND
2019-11-1335512659002ND
2019-11-1335512659001ND
2019-11-1335512659002ND