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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Combine Water Supply Corporation

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for trichloroacetic acid. Sample information shown below was taken by City of Seagoville.

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

61

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.70 ppb331.20 ppb - 2.00 ppb
20131.08 ppb42ND - 2.30 ppb
20142.83 ppb43ND - 9.20 ppb
20152.30 ppb441.40 ppb - 3.30 ppb
20162.10 ppb441.80 ppb - 2.70 ppb
20171.75 ppb441.20 ppb - 2.20 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for trichloroacetic acid was defined by the Environmental Protection Agency as 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

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for trichloroacetic acid. Sample information shown below was taken by City of Seagoville.

Date Lab ID Result
2012-02-2112025860031.20 ppb
2012-05-1612056510081.10 ppb
2012-05-1612056510071.10 ppb
2012-05-1612056510061.40 ppb
2012-05-1612056510051.000 ppb
2012-07-3112081000081.000 ppb
2012-07-311208100005ND
2012-07-3112081000061.10 ppb
2012-07-311208100007ND
2012-10-301210A290061.000 ppb
2012-10-301210A290051.10 ppb
2012-10-301210A290071.30 ppb
2012-10-301210A290081.90 ppb
2013-02-121302415007ND
2013-02-121302415009ND
2013-02-121302415008ND
2013-02-121302415006ND
2013-04-161304566005ND
2013-04-161304566006ND
2013-04-161304566007ND
2013-04-161304566008ND
2013-07-30Q1304559002ND
2013-07-30Q1304559001ND
2013-07-30Q1304559004ND
2013-07-30Q1304559003ND
2013-10-28Q1309979004ND
2013-10-28Q1309979003ND
2013-10-28Q1309979002ND
2013-10-28Q1309979001ND
2014-03-17Q14084640011.000 ppb
2014-03-17Q14084640021.70 ppb
2014-03-17Q14084640031.50 ppb
2014-03-17Q14084640041.60 ppb
2014-05-15Q14165980041.90 ppb
2014-05-15Q14165980021.10 ppb
2014-05-15Q14165980031.10 ppb
2014-05-15Q14165980011.50 ppb
2014-09-02Q1440529001ND
2014-09-02Q1440529002ND
2014-09-02Q1440529003ND
2014-09-02Q14405290041.50 ppb
2014-10-28Q14544380021.30 ppb
2014-10-28Q14544380011.10 ppb
2014-10-28Q14544380051.60 ppb
2014-10-28Q1454438004ND
2015-01-27Q15031470051.20 ppb
2015-01-27Q15031470041.10 ppb
2015-01-27Q15031470031.10 ppb
2015-01-27Q15031470021.30 ppb
2015-05-26Q15190360041.20 ppb
2015-05-26Q15190360032.70 ppb
2015-05-26Q15190360022.70 ppb
2015-05-26Q15190360011.40 ppb
2015-08-12Q15317790011.10 ppb
2015-08-12Q15317790021.30 ppb
2015-08-12Q15317790031.30 ppb
2015-08-12Q15317790042.00 ppb
2015-10-21Q15415020011.20 ppb
2015-10-21Q15415020021.80 ppb
2015-10-21Q15415020031.90 ppb
2015-10-21Q15415020042.20 ppb
2016-01-20Q16023320042.00 ppb
2016-01-20Q16023320031.90 ppb
2016-01-20Q16023320022.00 ppb
2016-01-20Q16023320012.10 ppb
2016-04-06Q16136720011.70 ppb
2016-04-06Q16136720021.60 ppb
2016-04-06Q16136720031.60 ppb
2016-04-06Q16136720041.50 ppb
2016-07-13Q16283770041.80 ppb
2016-07-13Q16283770032.40 ppb
2016-07-13Q16283770022.10 ppb
2016-07-13Q16283770011.50 ppb
2016-10-17Q1643890001ND
2016-10-17Q16438900031.40 ppb
2016-10-17Q16438900041.50 ppb
2016-10-17Q16438900021.50 ppb
2017-01-18Q1702349001ND
2017-01-18Q1702349005ND
2017-01-18Q1702349002ND
2017-01-18Q1702349004ND
2017-04-24Q17165260021.60 ppb
2017-04-24Q17165260041.20 ppb
2017-04-24Q17165260011.000 ppb
2017-04-24Q17165260031.40 ppb
2017-07-26Q1731045003ND
2017-07-26Q1731045004ND
2017-07-26Q1731045002ND
2017-07-26Q1731045001ND
2017-10-25Q17552880021.50 ppb
2017-10-25Q17552880041.20 ppb
2017-10-25Q17552880031.20 ppb
2017-10-25Q1755288001ND