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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Aquarion Water Company of Connecticut - Valley System

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

 

80

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
20140.563 ppb168ND - 2.00 ppb
2015N/A00N/A
20160.500 ppb167ND - 2.00 ppb
20170.438 ppb167ND - 1.000 ppb
20180.500 ppb168ND - 1.000 ppb
20190.688 ppb1611ND - 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
2014-01-08201400349-DBPND
2014-01-08201400351-DBP1.000 ppb
2014-01-08201400355-DBPND
2014-01-08201400348-DBPND
2014-04-02201404401-DBPND
2014-04-02201404402-DBPND
2014-04-02201404404-DBP1.000 ppb
2014-04-02201404408-DBPND
2014-07-09201409410-DBP1.000 ppb
2014-07-09201409406-DBP1.000 ppb
2014-07-09201409404-DBP2.00 ppb
2014-07-09201409403-DBPND
2014-10-08201415160-DBPND
2014-10-08201415161-DBP1.000 ppb
2014-10-08201415165-DBP1.000 ppb
2014-10-08201415169-DBP1.000 ppb
2016-01-05201600123-DBPND
2016-01-05201600127-DBPND
2016-01-05201600124-DBPND
2016-01-05201600125-DBPND
2016-04-06201604313-DBP1.000 ppb
2016-04-06201604311-DBP1.000 ppb
2016-04-06201604310-DBPND
2016-04-06201604309-DBPND
2016-07-07201608575-DBP1.000 ppb
2016-07-07201608573-DBP1.000 ppb
2016-07-07201608576-DBP2.00 ppb
2016-07-07201608574-DBPND
2016-10-05201613504-DBP1.000 ppb
2016-10-05201613507-DBPND
2016-10-05201613505-DBPND
2016-10-05201613506-DBP1.000 ppb
2017-01-03201700123-DBPND
2017-01-03201700125-DBPND
2017-01-03201700124-DBPND
2017-01-03201700127-DBP1.000 ppb
2017-04-05201704801-DBPND
2017-04-05201704807-DBP1.000 ppb
2017-04-05201704802-DBPND
2017-04-05201704803-DBPND
2017-07-06201710053-DBP1.000 ppb
2017-07-06201710051-DBP1.000 ppb
2017-07-06201710052-DBPND
2017-07-06201710050-DBPND
2017-10-03201715542-DBP1.000 ppb
2017-10-03201715539-DBPND
2017-10-03201715540-DBP1.000 ppb
2017-10-03201715538-DBP1.000 ppb
2018-01-03201800253-DBPND
2018-01-03201800257-DBP1.000 ppb
2018-01-03201800254-DBPND
2018-01-03201800255-DBPND
2018-04-04201804134-DBP1.000 ppb
2018-04-04201804132-DBPND
2018-04-04201804131-DBPND
2018-04-04201804130-DBPND
2018-07-05201809641-DBP1.000 ppb
2018-07-05201809642-DBP1.000 ppb
2018-07-05201809640-DBP1.000 ppb
2018-07-05201809644-DBP1.000 ppb
2018-10-02201815159-DBP1.000 ppb
2018-10-02201815161-DBPND
2018-10-02201815157-DBP1.000 ppb
2018-10-02201815158-DBPND
2019-01-10201900570-DBP1.000 ppb
2019-01-10201900571-DBPND
2019-01-10201900572-DBP1.000 ppb
2019-01-10201900575-DBP1.000 ppb
2019-04-02201904270-DBP1.000 ppb
2019-04-02201904268-DBP1.000 ppb
2019-04-02201904267-DBP1.000 ppb
2019-04-02201904266-DBP1.000 ppb
2019-07-02201909848-DBPND
2019-07-02201909849-DBPND
2019-07-02201909850-DBP1.000 ppb
2019-07-02201909851-DBP1.000 ppb
2019-10-03201916104-DBP1.000 ppb
2019-10-03201916105-DBPND
2019-10-03201916106-DBP1.000 ppb
2019-10-08201916442-DBPND