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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Halfmoon Water District (Troy)

Trichloroacetic 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

 

119

Samples

0

Samples exceeding legal limit (MCL)

112

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20145.89 ppb2016ND - 26.7 ppb
201513.2 ppb2018ND - 40.0 ppb
201615.1 ppb20201.000 ppb - 33.0 ppb
201722.0 ppb20200.730 ppb - 59.0 ppb
201810.8 ppb20201.02 ppb - 17.6 ppb
201913.2 ppb1918ND - 29.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-06JH1401633DBP211.8 ppb
2014-03-06JH1401631DBP24.40 ppb
2014-03-06JH1401635-DBPS8.70 ppb
2014-03-06JH1401627-DBPS10.1 ppb
2014-03-06JH1401629DBP210.1 ppb
2014-06-03JH1403555DBP226.7 ppb
2014-06-03JH14035596.20 ppb
2014-06-03JH1403563DBP211.5 ppb
2014-06-03JH1403561DPB27.40 ppb
2014-06-03JH1403557DBP27.60 ppb
2014-09-02JH1406284DBP22.07 ppb
2014-09-02JH1406288DBP2ND
2014-09-02JH1406286DBP22.94 ppb
2014-09-02JH1406282DBP22.13 ppb
2014-09-02JH1406290DBP2ND
2014-12-02JH1408541DBP21.97 ppb
2014-12-02JH1408539DBP2ND
2014-12-02JH1408543DBP2ND
2014-12-02JH1408537-DBP22.86 ppb
2014-12-02JH1408535DBP21.37 ppb
2015-03-03JH1501320DBP22.44 ppb
2015-03-03JH1501318DBP2ND
2015-03-03JH1501316DBP22.22 ppb
2015-03-03JH1501314DBP2ND
2015-03-03JH1501322DBP21.35 ppb
2015-06-03JH1503288DBP214.0 ppb
2015-06-03JH1503290DBP219.0 ppb
2015-06-03JH1503286DBP220.0 ppb
2015-06-03JH1503284DBP219.0 ppb
2015-06-03JH1503282DBP240.0 ppb
2015-09-01JH1505895-DBP219.0 ppb
2015-09-01JH1505899-DBP210.00 ppb
2015-09-01JH1505893-DBP228.0 ppb
2015-09-01JH1505897-DBP218.0 ppb
2015-09-01JH1505901-DBP216.0 ppb
2015-12-01JH1508123-DBP23.40 ppb
2015-12-01JH1508115-DBP219.0 ppb
2015-12-01JH1508119-DBP28.40 ppb
2015-12-01JH1508121-DBP211.0 ppb
2015-12-01JH1508117-DBP213.0 ppb
2016-03-01JH1601445-DBP210.00 ppb
2016-03-01JH1601442-DBP225.0 ppb
2016-03-01JH1601451-DBP28.10 ppb
2016-03-01JH1601447-DBP28.70 ppb
2016-03-01JH1601449-DBP212.0 ppb
2016-06-07JH1604518-DBP233.0 ppb
2016-06-07JH1604523-DBP217.0 ppb
2016-06-07JH1604526-DBP216.0 ppb
2016-06-07JH1604519-DBP27.00 ppb
2016-06-07JH1604521-DBP217.0 ppb
2016-09-06JH1607647-DBP222.0 ppb
2016-09-06JH1607649-DBP225.0 ppb
2016-09-06JH1607655-DBP233.0 ppb
2016-09-06JH1607651-DBP21.000 ppb
2016-09-06JH1607653-DBP215.0 ppb
2016-12-06JH1610677-DBP220.0 ppb
2016-12-06JH1610671-DBP21.60 ppb
2016-12-06JH1610675-DBP29.20 ppb
2016-12-06JH1610669-DBP211.0 ppb
2016-12-06JH1610673-DBP210.00 ppb
2017-03-01JH1701552-DBP227.7 ppb
2017-03-01JH1701546-DBP234.7 ppb
2017-03-01JH1701550-DBP232.3 ppb
2017-03-01JH1701544-DBP216.0 ppb
2017-03-01JH1701548-DBP235.3 ppb
2017-06-01JH1703628-DBP223.0 ppb
2017-06-01JH1703626-DBP220.4 ppb
2017-06-01JH1703630-DBP259.0 ppb
2017-06-01JH1703624-DBP27.43 ppb
2017-06-01JH1703622-DBP226.4 ppb
2017-09-01JH1707055-DBP228.1 ppb
2017-09-01JH1707051-DBP230.0 ppb
2017-09-01JH1707053-DBP226.4 ppb
2017-09-01JH1707049-DBP23.03 ppb
2017-09-01JH1707047-DBP231.8 ppb
2017-12-05JH1709716-DBP20.730 ppb
2017-12-05JH1709714-DBP29.80 ppb
2017-12-05JH1709722-DBP27.90 ppb
2017-12-05JH1709718-DBP210.00 ppb
2017-12-05JH1709720-DBP211.0 ppb
2018-03-06JH1801491-DBP23.20 ppb
2018-03-06JH1801503-DBP210.00 ppb
2018-03-06JH1801495-DBP211.0 ppb
2018-03-06JH1801493-DBP29.00 ppb
2018-03-06JH1801497-DBP217.0 ppb
2018-06-05JH1803748-DBP213.1 ppb
2018-06-05JH1803749-DBP213.7 ppb
2018-06-05JH1803750-DBP215.9 ppb
2018-06-05JH1803751-DBP216.0 ppb
2018-06-05JH1803747-DBP22.29 ppb
2018-09-04JH1807101-DBP215.2 ppb
2018-09-04JH1807100-DBP217.6 ppb
2018-09-04JH1807104-DBP217.0 ppb
2018-09-04JH1807102-DBP214.6 ppb
2018-09-04JH1807099-DBP21.62 ppb
2018-12-04JH1809480-DBP213.0 ppb
2018-12-04JH1809478-DBP211.4 ppb
2018-12-04JH1809476-DBP21.02 ppb
2018-12-04JH1809477-DBP23.03 ppb
2018-12-04JH1809479-DBP210.1 ppb
2019-03-05JH1901326-DBP912.1 ppb
2019-03-05JH1901322-DBP214.0 ppb
2019-03-05JH1901324-DBP212.6 ppb
2019-03-05JH1901323-DBP29.64 ppb
2019-03-05JH1901325-DBP22.70 ppb
2019-06-04JH1903381-DBP24.60 ppb
2019-06-04JH1903382-DBP212.3 ppb
2019-06-04JH1903379-DBP212.8 ppb
2019-06-04JH1903378-DBP26.17 ppb
2019-06-04JH1903380-DBP211.6 ppb
2019-09-03JH1906427-DBP2ND
2019-09-03JH1906429-DBP222.0 ppb
2019-09-03JH1906426-DBP227.0 ppb
2019-09-03JH1906428-DBP22.70 ppb
2019-09-03JH1906430-DBP229.0 ppb
2019-12-04JH1908563-DBPS17.4 ppb
2019-12-04JH1908559-DBP222.0 ppb
2019-12-04JH1908560-DBPS15.6 ppb
2019-12-04JH1908562-DBPS16.2 ppb