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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Connecticut Water Company - Northern Region-Western System

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

 

160

Samples

0

Samples exceeding legal limit (MCL)

157

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20146.84 ppb32321.60 ppb - 13.0 ppb
2015N/A00N/A
20165.58 ppb3231ND - 13.0 ppb
20177.62 ppb32321.10 ppb - 20.0 ppb
20189.14 ppb3230ND - 19.0 ppb
20197.52 ppb32320.600 ppb - 13.0 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
2014-02-041747HAA59.00 ppb
2014-02-041748HAA54.00 ppb
2014-02-041749HAA511.0 ppb
2014-02-041750HAA52.00 ppb
2014-02-041751HAA57.00 ppb
2014-02-041752HAA510.00 ppb
2014-02-041753HAA513.0 ppb
2014-02-041754HAA512.0 ppb
2014-05-063067HAA57.00 ppb
2014-05-066107HAA56.00 ppb
2014-05-066108HAA57.00 ppb
2014-05-066109HAA58.00 ppb
2014-05-066110HAA56.00 ppb
2014-05-066112HAA53.00 ppb
2014-05-066113HAA57.00 ppb
2014-05-066114HAA53.00 ppb
2014-08-05BG88648HAA55.00 ppb
2014-08-05BG88649HAA59.60 ppb
2014-08-05BG88650HAA58.60 ppb
2014-08-05BG88651HAA56.30 ppb
2014-08-05BG88652HAA57.60 ppb
2014-08-05BG88653HAA52.80 ppb
2014-08-05BG88654HAA57.30 ppb
2014-08-05BG88655HAA52.50 ppb
2014-11-25BH46470HAA51.60 ppb
2014-11-25BH46471HAA59.70 ppb
2014-11-25BH46472HAA59.70 ppb
2014-11-25BH46473HAA510.00 ppb
2014-11-25BH46474HAA510.00 ppb
2014-11-25BH46475HAA53.80 ppb
2014-11-25BH46476HAA54.80 ppb
2014-11-25BH46477HAA54.60 ppb
2016-02-04BK61857HAA53.10 ppb
2016-02-04BK61858HAA59.50 ppb
2016-02-04BK61859HAA58.60 ppb
2016-02-04BK61860HAA511.0 ppb
2016-02-04BK61861HAA513.0 ppb
2016-02-04BK61862HAA53.10 ppb
2016-02-04BK61863HAA55.60 ppb
2016-02-04BK61864HAA55.40 ppb
2016-05-05BN26300HAA52.80 ppb
2016-05-05BN26301HAA511.0 ppb
2016-05-05BN26302HAA510.00 ppb
2016-05-05BN26303HAA512.0 ppb
2016-05-05BN26304HAA511.0 ppb
2016-05-05BN26305HAA52.40 ppb
2016-05-05BN26306HAA55.30 ppb
2016-05-05BN26307HAA56.50 ppb
2016-08-18BN94948HAA54.40 ppb
2016-08-18BN94949HAA53.30 ppb
2016-08-18BN94950HAA51.50 ppb
2016-08-18BN94951HAA56.70 ppb
2016-08-18BN94952HAA5ND
2016-08-18BN94953HAA51.40 ppb
2016-08-18BN94954HAA54.60 ppb
2016-08-18BN94955HAA53.80 ppb
2016-11-03BV75338HAA51.90 ppb
2016-11-03BV75339HAA57.00 ppb
2016-11-03BV75340HAA54.30 ppb
2016-11-03BV75341HAA55.00 ppb
2016-11-03BV75342HAA54.30 ppb
2016-11-03BV75343HAA52.40 ppb
2016-11-03BV75344HAA53.60 ppb
2016-11-03BV75345HAA54.20 ppb
2017-02-02BX44867HAA52.00 ppb
2017-02-02BX44868HAA58.70 ppb
2017-02-02BX44869HAA57.30 ppb
2017-02-02BX44870HAA59.00 ppb
2017-02-02BX44871HAA511.0 ppb
2017-02-02BX44872HAA51.80 ppb
2017-02-02BX44873HAA54.20 ppb
2017-02-02BX44874HAA55.40 ppb
2017-05-04BY15439HAA52.00 ppb
2017-05-04BY15440HAA59.30 ppb
2017-05-04BY15441HAA53.70 ppb
2017-05-04BY15442HAA511.0 ppb
2017-05-04BY15443HAA513.0 ppb
2017-05-04BY15444HAA52.70 ppb
2017-05-04BY15445HAA56.30 ppb
2017-05-04BY15446HAA55.00 ppb
2017-08-07BY79801HAA54.00 ppb
2017-08-07BY79802HAA511.0 ppb
2017-08-07BY79803HAA56.40 ppb
2017-08-07BY79804HAA58.90 ppb
2017-08-07BY79805HAA58.00 ppb
2017-08-07BY79806HAA56.80 ppb
2017-08-07BY79807HAA57.20 ppb
2017-08-07BY79808HAA55.90 ppb
2017-11-06BZ33918HAA520.0 ppb
2017-11-16BZ43465HAA53.70 ppb
2017-11-16BZ43466HAA511.0 ppb
2017-11-16BZ43467HAA514.0 ppb
2017-11-16BZ43468HAA51.10 ppb
2017-11-16BZ43469HAA59.30 ppb
2017-11-16BZ43470HAA513.0 ppb
2017-11-16BZ43471HAA511.0 ppb
2018-02-01BZ83504HAA514.0 ppb
2018-02-01BZ83505HAA518.0 ppb
2018-02-01BZ83506HAA519.0 ppb
2018-02-01BZ83507HAA518.0 ppb
2018-02-01BZ83508HAA59.30 ppb
2018-02-01BZ83509HAA511.0 ppb
2018-02-01BZ83510HAA59.20 ppb
2018-02-21BZ93283HAA510.00 ppb
2018-05-03CA41161HAA510.00 ppb
2018-05-03CA41162HAA513.0 ppb
2018-05-03CA41163HAA513.0 ppb
2018-05-03CA41164HAA512.0 ppb
2018-05-03CA41165HAA54.70 ppb
2018-05-03CA41166HAA57.10 ppb
2018-05-03CA41167HAA57.80 ppb
2018-05-15CA48118HAA512.0 ppb
2018-08-02CB040201.60 ppb
2018-08-02CB0402110.00 ppb
2018-08-02CB040228.40 ppb
2018-08-02CB04023ND
2018-08-02CB040244.00 ppb
2018-08-02CB040257.90 ppb
2018-08-02CB040267.80 ppb
2018-08-06CB0584014.0 ppb
2018-11-01DBP 2005111337.10 ppb
2018-11-01DBP 2005111345.90 ppb
2018-11-01DBP 2005111354.20 ppb
2018-11-01DBP 200511136ND
2018-11-01DBP 2005111377.80 ppb
2018-11-01DBP 2005111386.60 ppb
2018-11-01DBP 2005111398.50 ppb
2018-11-05DBP 20051138910.7 ppb
2019-02-07DBP 2005210835.70 ppb
2019-02-07DBP 20052108411.1 ppb
2019-02-07DBP 2005210854.70 ppb
2019-02-07DBP 20052108610.8 ppb
2019-02-07DBP 2005210874.20 ppb
2019-02-07DBP 20052108812.4 ppb
2019-02-07DBP 2005210898.50 ppb
2019-02-11DBP 2005212568.60 ppb
2019-05-09DBP 2005315755.90 ppb
2019-05-09DBP 20053157611.1 ppb
2019-05-09DBP 20053157711.8 ppb
2019-05-09DBP 20053158213.0 ppb
2019-05-09DBP 2005315845.70 ppb
2019-05-09DBP 2005315867.00 ppb
2019-05-09DBP 2005315876.80 ppb
2019-05-13DBP 2005318377.00 ppb
2019-08-01DBP 2005427222.00 ppb
2019-08-01DBP 2005427237.90 ppb
2019-08-01DBP 2005427246.70 ppb
2019-08-01DBP 2005427250.600 ppb
2019-08-01DBP 2005427267.40 ppb
2019-08-01DBP 2005427276.60 ppb
2019-08-01DBP 2005427285.90 ppb
2019-08-13DBP 2005447589.10 ppb
2019-11-07DBP 2005558284.00 ppb
2019-11-07DBP 20055583011.1 ppb
2019-11-07DBP 20055583110.2 ppb
2019-11-07DBP 2005558323.40 ppb
2019-11-07DBP 20055583310.00 ppb
2019-11-07DBP 2005558346.80 ppb
2019-11-07DBP 2005558356.00 ppb
2019-11-18DBP 2005570048.50 ppb