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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Monroe

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.68 ppb167ND - 6.30 ppb
20152.67 ppb1610ND - 6.70 ppb
20161.31 ppb164ND - 8.20 ppb
20173.05 ppb168ND - 11.0 ppb
20182.61 ppb167ND - 11.0 ppb
20190.506 ppb162ND - 4.10 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
2014-03-19AI363153.20 ppb
2014-03-19AI363146.30 ppb
2014-03-19AI363134.60 ppb
2014-03-19AI363122.60 ppb
2014-06-16AI43301ND
2014-06-16AI43300ND
2014-06-16AI43299ND
2014-06-16AI432983.10 ppb
2014-09-16AI540343.20 ppb
2014-09-16AI54033ND
2014-09-16AI540353.90 ppb
2014-09-16AI54036ND
2014-12-17AI61719ND
2014-12-17AI61718ND
2014-12-17AI61717ND
2014-12-17AI61716ND
2015-03-17AI692256.70 ppb
2015-03-17AI692245.50 ppb
2015-03-17AI692235.80 ppb
2015-03-17AI692225.20 ppb
2015-06-15AI797603.80 ppb
2015-06-15AI797613.30 ppb
2015-06-15AI797633.70 ppb
2015-06-15AI797623.10 ppb
2015-09-16AI89993ND
2015-09-16AI89992ND
2015-09-16AI89991ND
2015-09-16AI899902.40 ppb
2015-12-16AJ03018ND
2015-12-16AJ03017ND
2015-12-16AJ03016ND
2015-12-16AJ030153.20 ppb
2016-03-15AJ08209ND
2016-03-15AJ08208ND
2016-03-15AJ08210ND
2016-03-15AJ08211ND
2016-06-15AJ14276ND
2016-06-15AJ14275ND
2016-06-15AJ14274ND
2016-06-15AJ14273ND
2016-09-20AJ282194.30 ppb
2016-09-20AJ282182.60 ppb
2016-09-20AJ282178.20 ppb
2016-09-20AJ282165.90 ppb
2016-12-19AJ37094ND
2016-12-19AJ37097ND
2016-12-19AJ37096ND
2016-12-19AJ37095ND
2017-03-15AJ482072.60 ppb
2017-03-15AJ48206ND
2017-03-15AJ48205ND
2017-03-15AJ48204ND
2017-06-15AJ57689ND
2017-06-15AJ57688ND
2017-06-15AJ57687ND
2017-06-15AJ57686ND
2017-09-19AJ684853.50 ppb
2017-09-19AJ684843.90 ppb
2017-09-19AJ684862.70 ppb
2017-09-19AJ68487ND
2017-12-18AJ7560311.0 ppb
2017-12-18AJ7560210.00 ppb
2017-12-18AJ756019.00 ppb
2017-12-18AJ756006.10 ppb
2018-03-16AJ86087ND
2018-03-16AJ86086ND
2018-03-16AJ86085ND
2018-03-16AJ86084ND
2018-06-19AJ91997ND
2018-06-19AJ9199811.0 ppb
2018-06-19AJ920008.30 ppb
2018-06-19AJ919999.00 ppb
2018-09-18AK013744.50 ppb
2018-09-18AK013733.30 ppb
2018-09-18AK013723.20 ppb
2018-09-18AK013712.50 ppb
2018-12-10AK07678ND
2018-12-10AK07677ND
2018-12-10AK07676ND
2018-12-10AK07675ND
2019-03-19AK13577ND
2019-03-19AK135764.00 ppb
2019-03-19AK13578ND
2019-03-19AK135794.10 ppb
2019-06-18AK20029ND
2019-06-18AK20028ND
2019-06-18AK20027ND
2019-06-18AK20026ND
2019-09-16AK30875ND
2019-09-16AK30874ND
2019-09-16AK30873ND
2019-09-16AK30872ND
2019-12-16AK38458ND
2019-12-16AK38461ND
2019-12-16AK38460ND
2019-12-16AK38459ND