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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Gallup Water 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.151 ppb16160.0600 ppb - 0.290 ppb
20150.158 ppb1615ND - 0.430 ppb
20160.148 ppb166ND - 0.810 ppb
2017ND160ND
20180.0513 ppb163ND - 0.280 ppb
20190.262 ppb167ND - 1.70 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
2014-01-2420140024440.230 ppb
2014-01-2420140024460.150 ppb
2014-01-2420140024450.0600 ppb
2014-01-2420140024430.240 ppb
2014-04-1620140125620.250 ppb
2014-04-1620140125630.240 ppb
2014-04-1620140125610.0800 ppb
2014-04-1620140125640.0700 ppb
2014-07-0120140208300.200 ppb
2014-07-0120140208330.130 ppb
2014-07-0120140208310.0700 ppb
2014-07-0120140208320.0600 ppb
2014-11-1920140357380.180 ppb
2014-11-1920140357400.0800 ppb
2014-11-1920140357390.0900 ppb
2014-11-1920140357370.290 ppb
2015-02-0420150039040.260 ppb
2015-02-0420150039020.210 ppb
2015-02-0420150039010.0900 ppb
2015-02-0420150039030.0800 ppb
2015-04-0820150109170.1000 ppb
2015-04-0820150109180.0900 ppb
2015-04-0820150109150.0700 ppb
2015-04-082015010916ND
2015-08-1820150239500.190 ppb
2015-08-1820150239510.0800 ppb
2015-08-1820150239520.0800 ppb
2015-08-1820150239490.210 ppb
2015-11-3020150351040.340 ppb
2015-11-3020150351050.180 ppb
2015-11-3020150351020.120 ppb
2015-11-3020150351030.430 ppb
2016-02-2420160052900.350 ppb
2016-02-2420160052910.260 ppb
2016-02-2420160052880.160 ppb
2016-02-2420160052890.150 ppb
2016-04-122016010326ND
2016-04-122016010324ND
2016-04-1220160103270.640 ppb
2016-04-1220160103250.810 ppb
2016-07-192016020566ND
2016-07-192016020565ND
2016-07-192016020564ND
2016-07-192016020563ND
2016-10-252016031001ND
2016-10-252016031000ND
2016-10-252016030998ND
2016-10-252016030999ND
2017-01-102017000730ND
2017-01-102017000729ND
2017-01-102017000732ND
2017-01-102017000731ND
2017-04-042017009638ND
2017-04-042017009637ND
2017-04-042017009635ND
2017-04-042017009636ND
2017-07-052017019171ND
2017-07-052017019172ND
2017-07-052017019174ND
2017-07-052017019173ND
2017-10-112017029275ND
2017-10-112017029274ND
2017-10-112017029276ND
2017-10-112017029277ND
2018-01-102018000973ND
2018-01-102018000972ND
2018-01-102018000971ND
2018-01-102018000970ND
2018-04-112018010264ND
2018-04-112018010261ND
2018-04-1120180102620.270 ppb
2018-04-112018010263ND
2018-07-102018018728ND
2018-07-102018018727ND
2018-07-102018018726ND
2018-07-102018018725ND
2018-10-0420180284650.270 ppb
2018-10-042018028466ND
2018-10-042018028467ND
2018-10-0420180284680.280 ppb
2019-01-102019000748ND
2019-01-1020190007490.360 ppb
2019-01-1020190007501.70 ppb
2019-01-102019000751ND
2019-04-092019008900ND
2019-04-0920190089030.520 ppb
2019-04-0920190089020.270 ppb
2019-04-092019008901ND
2019-07-092019018732ND
2019-07-092019018734ND
2019-07-0920190187330.300 ppb
2019-07-092019018731ND
2019-10-1020190291130.720 ppb
2019-10-1020190291120.320 ppb
2019-10-102019029111ND
2019-10-102019029110ND