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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Danbury 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

 

165

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.559 ppb3713ND - 4.00 ppb
2015N/A00N/A
20160.647 ppb329ND - 4.60 ppb
20170.0875 ppb321ND - 2.80 ppb
20180.0938 ppb325ND - 0.700 ppb
20190.378 ppb3218ND - 1.000 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
2014-01-06E401245-1CH1.40 ppb
2014-01-06E401245-2CHND
2014-03-11E403C94-2CH1.70 ppb
2014-03-11E403C94-4CHND
2014-03-11E403C94-7CH1.000 ppb
2014-03-12E403C94-1CHND
2014-03-13E403C94-6CHND
2014-03-14E403C94-8CH1.20 ppb
2014-03-17E403C94-3CH1.000 ppb
2014-03-18E403C94-5CHND
2014-06-10E406G56-4CHND
2014-06-10E406G56-6CH2.20 ppb
2014-06-11E406G56-1CHND
2014-06-12E406G56-2CHND
2014-06-12E406G56-7CH1.80 ppb
2014-06-12E406G56-8CH1.30 ppb
2014-06-13E406G56-5CH1.30 ppb
2014-06-16E406G56-3CHND
2014-09-10E409F66-1GEND
2014-09-11E409F66-4GEND
2014-09-11E409F66-6GEND
2014-09-12E409F66-2GEND
2014-09-12E409F66-8GEND
2014-09-15E409F66-3GEND
2014-09-23E409M19-1GEND
2014-09-23E409M19-2GEND
2014-09-23E409M19-3GEND
2014-09-30E409T37-2GEND
2014-09-30E410021-1GE1.20 ppb
2014-12-12E412D88-1GE4.00 ppb
2014-12-12E412D88-7GEND
2014-12-12E412D88-8GE1.10 ppb
2014-12-15E412D88-2GEND
2014-12-15E412D88-3GE1.50 ppb
2014-12-15E412D88-4GEND
2014-12-15E412D88-6GEND
2014-12-16E412D88-5GEND
2016-03-09E603E03-4-18GEND
2016-03-09E603E03-1-16GEND
2016-03-10E603E03-2-17GEND
2016-03-10E603E03-5-19GEND
2016-03-10E603E03-6-20GEND
2016-03-10E603E03-7-15GE1.20 ppb
2016-03-11E603E03-8-04GE1.10 ppb
2016-03-14E603E03-3-03GEND
2016-06-16E606O13-8-04GE2.20 ppb
2016-06-16E606O13-1-16GEND
2016-06-16E606O13-2-17GE3.10 ppb
2016-06-16E606O13-4-18GEND
2016-06-16E606O13-5-19GE1.40 ppb
2016-06-16E606O13-6-20GE4.60 ppb
2016-06-20E606O13-7-15GE2.10 ppb
2016-06-20E606O13-3-03GE1.000 ppb
2016-09-08188688CHND
2016-09-09188692CH4.00 ppb
2016-09-13188690CHND
2016-09-13188678CHND
2016-09-13188680CHND
2016-09-13188682CHND
2016-09-13188684CHND
2016-09-14188686CHND
2016-12-12192765CHND
2016-12-13192767CHND
2016-12-13192769CHND
2016-12-13192755CHND
2016-12-13192757CHND
2016-12-13192761CHND
2016-12-13192763CHND
2016-12-14192759CHND
2017-03-09196060GEND
2017-03-09196062GEND
2017-03-09196066GEND
2017-03-13196064GE2.80 ppb
2017-03-14196070GEND
2017-03-15196072GEND
2017-03-15196074GEND
2017-03-15196068GEND
2017-06-13200352GEND
2017-06-13200346GEND
2017-06-14200340GEND
2017-06-14200342GEND
2017-06-14200350GEND
2017-06-15200354GEND
2017-06-15200344GEND
2017-06-15200348GEND
2017-09-12204479GEND
2017-09-12204485GEND
2017-09-12204487GEND
2017-09-12204473GEND
2017-09-12204475GEND
2017-09-13204477GEND
2017-09-13204481GEND
2017-09-13204483GEND
2017-12-11208504GEND
2017-12-11208506GEND
2017-12-12208508GEND
2017-12-12208510GEND
2017-12-12208512GEND
2017-12-12208514GEND
2017-12-12208500GEND
2017-12-12208502GEND
2018-03-14211599GEND
2018-03-14211585GEND
2018-03-14211587GEND
2018-03-14211589GEND
2018-03-14211591GEND
2018-03-15211593GEND
2018-03-15211595GEND
2018-03-15211597GEND
2018-06-19215751GEND
2018-06-19215737GEND
2018-06-19215739GEND
2018-06-19215743GEND
2018-06-19215745GEND
2018-06-20215747GEND
2018-06-20215749GEND
2018-06-20215741GEND
2018-09-14DBP 200505484ND
2018-09-14DBP 2005054860.600 ppb
2018-09-14DBP 200505491ND
2018-09-14DBP 200505493ND
2018-09-14DBP 200505495ND
2018-09-14DBP 2005054970.600 ppb
2018-09-14DBP 200505499ND
2018-09-17DBP 200505658ND
2018-12-14DBP 200516093ND
2018-12-14DBP 200516094ND
2018-12-14DBP 200516095ND
2018-12-14DBP 200516096ND
2018-12-14DBP 2005160970.500 ppb
2018-12-14DBP 200516098ND
2018-12-14DBP 2005160990.600 ppb
2018-12-14DBP 2005161000.700 ppb
2019-03-14DBP 2005247600.500 ppb
2019-03-14DBP 200524761ND
2019-03-14DBP 200524762ND
2019-03-14DBP 2005247630.600 ppb
2019-03-14DBP 2005247640.600 ppb
2019-03-14DBP 2005247650.700 ppb
2019-03-14DBP 2005247660.800 ppb
2019-03-14DBP 2005247670.700 ppb
2019-06-20DBP 200537265ND
2019-06-20DBP 2005372660.500 ppb
2019-06-20DBP 2005372670.500 ppb
2019-06-20DBP 200537268ND
2019-06-20DBP 2005372690.700 ppb
2019-06-20DBP 2005372701.000 ppb
2019-06-20DBP 200537271ND
2019-06-20DBP 2005372720.600 ppb
2019-09-19DBP 200549612ND
2019-09-19DBP 2005496130.600 ppb
2019-09-19DBP 200549615ND
2019-09-19DBP 200549617ND
2019-09-19DBP 200549618ND
2019-10-11DBP 2005525030.700 ppb
2019-10-11DBP 2005525040.900 ppb
2019-10-11DBP 2005525051.000 ppb
2019-12-19DBP 200560926ND
2019-12-19DBP 200560927ND
2019-12-19DBP 200560929ND
2019-12-19DBP 2005609300.600 ppb
2019-12-19DBP 2005609310.600 ppb
2019-12-19DBP 200560932ND
2019-12-19DBP 200560934ND
2019-12-19DBP 2005609350.500 ppb