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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Falmouth Water Department

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

 

144

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
2014N/A00N/A
20152.14 ppb1614ND - 4.26 ppb
20161.80 ppb3224ND - 6.38 ppb
20170.703 ppb3210ND - 4.43 ppb
20180.288 ppb327ND - 1.71 ppb
20190.388 ppb328ND - 4.18 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 Result
2015-09-031.14 ppb
2015-09-033.79 ppb
2015-09-033.45 ppb
2015-09-033.30 ppb
2015-09-032.60 ppb
2015-09-032.38 ppb
2015-09-033.87 ppb
2015-09-031.78 ppb
2015-12-031.35 ppb
2015-12-031.51 ppb
2015-12-031.15 ppb
2015-12-03ND
2015-12-03ND
2015-12-034.26 ppb
2015-12-032.47 ppb
2015-12-031.26 ppb
2016-03-021.66 ppb
2016-03-021.90 ppb
2016-03-022.77 ppb
2016-03-021.07 ppb
2016-03-021.81 ppb
2016-03-021.44 ppb
2016-03-021.19 ppb
2016-03-031.81 ppb
2016-06-021.06 ppb
2016-06-021.64 ppb
2016-06-021.91 ppb
2016-06-022.10 ppb
2016-06-021.50 ppb
2016-06-023.20 ppb
2016-06-021.79 ppb
2016-06-02ND
2016-09-013.81 ppb
2016-09-014.99 ppb
2016-09-016.38 ppb
2016-09-012.90 ppb
2016-09-012.21 ppb
2016-09-014.88 ppb
2016-09-012.57 ppb
2016-09-011.63 ppb
2016-12-05ND
2016-12-05ND
2016-12-05ND
2016-12-05ND
2016-12-051.50 ppb
2016-12-05ND
2016-12-05ND
2016-12-05ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-061.64 ppb
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-06-05ND
2017-06-05ND
2017-06-053.12 ppb
2017-06-051.56 ppb
2017-06-051.75 ppb
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-09-05ND
2017-09-052.21 ppb
2017-09-052.34 ppb
2017-09-054.43 ppb
2017-09-051.05 ppb
2017-09-05ND
2017-09-053.38 ppb
2017-09-05ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-041.02 ppb
2018-03-05ND
2018-03-05ND
2018-03-05ND
2018-03-05ND
2018-03-05ND
2018-03-051.71 ppb
2018-03-05ND
2018-03-05ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-09-05ND
2018-09-051.27 ppb
2018-09-051.32 ppb
2018-09-051.27 ppb
2018-09-05ND
2018-09-051.26 ppb
2018-09-051.07 ppb
2018-09-061.31 ppb
2018-12-07ND
2018-12-07ND
2018-12-07ND
2018-12-07ND
2018-12-07ND
2018-12-07ND
2018-12-07ND
2018-12-07ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-06-12ND
2019-06-121.06 ppb
2019-06-121.17 ppb
2019-06-121.23 ppb
2019-06-121.08 ppb
2019-06-12ND
2019-06-12ND
2019-06-121.21 ppb
2019-09-12ND
2019-09-12ND
2019-09-12ND
2019-09-12ND
2019-09-12ND
2019-09-12ND
2019-09-121.40 ppb
2019-09-121.09 ppb
2019-12-09ND
2019-12-09ND
2019-12-09ND
2019-12-09ND
2019-12-09ND
2019-12-09ND
2019-12-094.18 ppb
2019-12-09ND