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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

City of Lancaster

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.

 

94

Samples

0

Samples exceeding legal limit (MCL)

67

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.32 ppb1413ND - 2.10 ppb
20130.125 ppb162ND - 1.000 ppb
20141.13 ppb1612ND - 2.50 ppb
20152.44 ppb1613ND - 6.40 ppb
20162.03 ppb16161.60 ppb - 2.70 ppb
20170.881 ppb1611ND - 1.60 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
2012-02-211202587006ND
2012-02-2112025870051.20 ppb
2012-06-1212064300081.20 ppb
2012-06-1212064300071.50 ppb
2012-06-1212064300061.20 ppb
2012-06-1212064300051.20 ppb
2012-09-1112093770081.80 ppb
2012-09-1112093770072.10 ppb
2012-09-1112093770061.50 ppb
2012-09-1112093770051.50 ppb
2012-11-2912119600071.50 ppb
2012-11-2912119600051.30 ppb
2012-11-2912119600061.20 ppb
2012-11-2912119600081.30 ppb
2013-02-121302416009ND
2013-02-1213024160081.000 ppb
2013-02-121302416007ND
2013-02-121302416006ND
2013-04-161304568008ND
2013-04-161304568007ND
2013-04-161304568006ND
2013-04-161304568005ND
2013-07-30Q1304561004ND
2013-07-30Q1304561001ND
2013-07-30Q1304561002ND
2013-07-30Q13045610031.000 ppb
2013-12-03Q1315875004ND
2013-12-03Q1315875003ND
2013-12-03Q1315875002ND
2013-12-03Q1315875001ND
2014-02-24Q1405851001ND
2014-02-24Q1405851002ND
2014-02-24Q1405851003ND
2014-02-24Q1405851004ND
2014-05-16Q14166690041.60 ppb
2014-05-16Q14166690031.50 ppb
2014-05-16Q14166690021.000 ppb
2014-05-16Q14166690011.20 ppb
2014-07-10Q14271720062.10 ppb
2014-07-10Q14271720052.50 ppb
2014-07-10Q14271720041.40 ppb
2014-07-10Q14271720031.50 ppb
2014-10-28Q14544410011.20 ppb
2014-10-28Q14544410021.10 ppb
2014-10-28Q14544410031.50 ppb
2014-10-28Q14544410041.40 ppb
2015-03-19Q1510465005ND
2015-03-19Q15104650041.10 ppb
2015-03-19Q1510465003ND
2015-03-19Q1510465002ND
2015-06-16Q15224050044.50 ppb
2015-06-16Q15224050035.80 ppb
2015-06-16Q15224050026.40 ppb
2015-06-16Q15224050016.20 ppb
2015-08-18Q15326660021.60 ppb
2015-08-18Q15326660011.60 ppb
2015-08-18Q15326660031.40 ppb
2015-08-18Q15326660041.70 ppb
2015-10-21Q15413830042.40 ppb
2015-10-21Q15413830032.40 ppb
2015-10-21Q15413830022.00 ppb
2015-10-21Q15413830012.00 ppb
2016-01-21Q16027000041.70 ppb
2016-01-21Q16027000032.20 ppb
2016-01-21Q16027000022.00 ppb
2016-01-21Q16027000012.00 ppb
2016-04-14Q16148830012.70 ppb
2016-04-14Q16148830022.70 ppb
2016-04-14Q16148830042.50 ppb
2016-04-14Q16148830032.40 ppb
2016-07-05Q16267630041.70 ppb
2016-07-05Q16267630032.20 ppb
2016-07-05Q16267630021.80 ppb
2016-07-05Q16267630011.70 ppb
2016-10-07Q16426830041.60 ppb
2016-10-07Q16426830032.10 ppb
2016-10-07Q16426830021.60 ppb
2016-10-07Q16426830011.60 ppb
2017-01-10Q17009580011.10 ppb
2017-01-10Q17009580031.10 ppb
2017-01-10Q17009580041.50 ppb
2017-01-10Q17009580021.30 ppb
2017-04-04Q17137780031.20 ppb
2017-04-04Q17137780061.20 ppb
2017-04-04Q17137780021.10 ppb
2017-04-04Q17137780051.000 ppb
2017-07-05Q17275910041.50 ppb
2017-07-05Q17275910021.60 ppb
2017-07-05Q17275910031.50 ppb
2017-07-05Q1727591001ND
2017-10-16Q1753559001ND
2017-10-16Q1753559002ND
2017-10-16Q1753559003ND
2017-10-16Q1753559004ND