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EWG's Tap Water Database — 2021 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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

68

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
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
20180.869 ppb1612ND - 1.40 ppb
20190.294 ppb164ND - 1.30 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
2014-02-24Q1405851004ND
2014-02-24Q1405851003ND
2014-02-24Q1405851002ND
2014-02-24Q1405851001ND
2014-05-16Q14166690041.60 ppb
2014-05-16Q14166690031.50 ppb
2014-05-16Q14166690021.000 ppb
2014-05-16Q14166690011.20 ppb
2014-07-10Q14271720041.40 ppb
2014-07-10Q14271720031.50 ppb
2014-07-10Q14271720052.50 ppb
2014-07-10Q14271720062.10 ppb
2014-10-28Q14544410041.40 ppb
2014-10-28Q14544410031.50 ppb
2014-10-28Q14544410021.10 ppb
2014-10-28Q14544410011.20 ppb
2015-03-19Q1510465005ND
2015-03-19Q15104650041.10 ppb
2015-03-19Q1510465003ND
2015-03-19Q1510465002ND
2015-06-16Q15224050016.20 ppb
2015-06-16Q15224050026.40 ppb
2015-06-16Q15224050044.50 ppb
2015-06-16Q15224050035.80 ppb
2015-08-18Q15326660041.70 ppb
2015-08-18Q15326660031.40 ppb
2015-08-18Q15326660021.60 ppb
2015-08-18Q15326660011.60 ppb
2015-10-21Q15413830042.40 ppb
2015-10-21Q15413830032.40 ppb
2015-10-21Q15413830022.00 ppb
2015-10-21Q15413830012.00 ppb
2016-01-21Q16027000022.00 ppb
2016-01-21Q16027000012.00 ppb
2016-01-21Q16027000032.20 ppb
2016-01-21Q16027000041.70 ppb
2016-04-14Q16148830042.50 ppb
2016-04-14Q16148830032.40 ppb
2016-04-14Q16148830022.70 ppb
2016-04-14Q16148830012.70 ppb
2016-07-05Q16267630041.70 ppb
2016-07-05Q16267630032.20 ppb
2016-07-05Q16267630021.80 ppb
2016-07-05Q16267630011.70 ppb
2016-10-07Q16426830011.60 ppb
2016-10-07Q16426830041.60 ppb
2016-10-07Q16426830032.10 ppb
2016-10-07Q16426830021.60 ppb
2017-01-10Q17009580021.30 ppb
2017-01-10Q17009580041.50 ppb
2017-01-10Q17009580011.10 ppb
2017-01-10Q17009580031.10 ppb
2017-04-04Q17137780031.20 ppb
2017-04-04Q17137780061.20 ppb
2017-04-04Q17137780021.10 ppb
2017-04-04Q17137780051.000 ppb
2017-07-05Q17275910031.50 ppb
2017-07-05Q1727591001ND
2017-07-05Q17275910021.60 ppb
2017-07-05Q17275910041.50 ppb
2017-10-16Q1753559002ND
2017-10-16Q1753559003ND
2017-10-16Q1753559004ND
2017-10-16Q1753559001ND
2018-01-31Q18039890041.000 ppb
2018-01-31Q18039890021.000 ppb
2018-01-31Q18039890031.000 ppb
2018-01-31Q18039890011.000 ppb
2018-04-12Q18152360021.30 ppb
2018-04-12Q18152360051.40 ppb
2018-04-12Q18152360031.40 ppb
2018-04-12Q18152360061.40 ppb
2018-07-12Q18277210041.10 ppb
2018-07-12Q18277210021.30 ppb
2018-07-12Q1827721003ND
2018-07-12Q18277210011.000 ppb
2018-10-11Q1840581004ND
2018-10-11Q18405810021.000 ppb
2018-10-11Q1840581003ND
2018-10-11Q1840581001ND
2019-01-09Q19011410021.20 ppb
2019-01-09Q19011410051.20 ppb
2019-01-09Q19011410041.30 ppb
2019-01-09Q19011410031.000 ppb
2019-04-15Q1915018003ND
2019-04-15Q1915018002ND
2019-04-15Q1915018001ND
2019-06-19Q1938627001ND
2019-08-06Q1951798004ND
2019-08-06Q1951798003ND
2019-08-06Q1951798002ND
2019-08-06Q1951798001ND
2019-10-10Q1972252002ND
2019-10-10Q1972252005ND
2019-10-10Q1972252004ND
2019-10-10Q1972252003ND