Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Trichloroacetic acid

City of San Jose - EVG/EDV/COY

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

53

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.225 ppb322ND - 3.70 ppb
20150.0875 ppb322ND - 1.50 ppb
20161.07 ppb3213ND - 4.60 ppb
20170.741 ppb3214ND - 3.20 ppb
20181.34 ppb3215ND - 7.50 ppb
20190.834 ppb327ND - 14.7 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
2014-01-149590-900-0805ND
2014-01-149590-901-0845ND
2014-01-149590-902-1055ND
2014-01-149590-903-0942ND
2014-01-149590-904-1118ND
2014-01-149590-905-1033ND
2014-01-149590-906-0915ND
2014-01-149590-907-1006ND
2014-04-081610-900-1118ND
2014-04-081610-901-1047ND
2014-04-081610-902-0835ND
2014-04-081610-903-0955ND
2014-04-081610-904-0815ND
2014-04-081610-905-0856ND
2014-04-081610-906-1024ND
2014-04-081610-907-0925ND
2014-07-081610-900-1137ND
2014-07-081610-901-1120ND
2014-07-081610-902-0904ND
2014-07-081610-903-0950ND
2014-07-081610-904-0843ND
2014-07-081610-905-0925ND
2014-07-081610-906-1059ND
2014-07-081610-907-1015ND
2014-10-141610-900-0805ND
2014-10-141610-901-0855ND
2014-10-141610-902-11023.50 ppb
2014-10-141610-903-0930ND
2014-10-141610-904-11203.70 ppb
2014-10-141610-905-1040ND
2014-10-141610-906-1015ND
2014-10-141610-907-0950ND
2015-01-131610-900-1105ND
2015-01-131610-901-1042ND
2015-01-131610-902-0840ND
2015-01-131610-903-0946ND
2015-01-131610-904-08181.30 ppb
2015-01-131610-905-0900ND
2015-01-131610-906-1016ND
2015-01-131610-907-0926ND
2015-04-141610-900-1129ND
2015-04-141610-901-1050ND
2015-04-141610-902-0810ND
2015-04-141610-903-1025ND
2015-04-141610-904-0845ND
2015-04-141610-905-0935ND
2015-04-141610-906-1110ND
2015-04-141610-907-0956ND
2015-07-141610-900-1040ND
2015-07-141610-901-1110ND
2015-07-141610-902-0835ND
2015-07-141610-903-0925ND
2015-07-141610-904-0810ND
2015-07-141610-905-0855ND
2015-07-141610-906-1015ND
2015-07-141610-907-0940ND
2015-10-131610-900-1020ND
2015-10-131610-901-0904ND
2015-10-131610-902-1200ND
2015-10-131610-903-0944ND
2015-10-131610-904-12181.50 ppb
2015-10-131610-905-1135ND
2015-10-131610-906-0830ND
2015-10-131610-907-1053ND
2016-01-121610-900-0905ND
2016-01-121610-901-0840ND
2016-01-121610-902-1059ND
2016-01-121610-903-0807ND
2016-01-121610-904-1122ND
2016-01-121610-905-1030ND
2016-01-121610-906-0942ND
2016-01-121610-907-1010ND
2016-04-121610-004-12003.10 ppb
2016-04-121610-900-10493.40 ppb
2016-04-121610-901-1026ND
2016-04-121610-902-11444.20 ppb
2016-04-121610-903-0930ND
2016-04-121610-905-11244.60 ppb
2016-04-121610-906-09033.40 ppb
2016-04-121610-907-09543.90 ppb
2016-07-121610-900-08201.50 ppb
2016-07-121610-901-08531.10 ppb
2016-07-121610-902-11331.70 ppb
2016-07-121610-903-10152.10 ppb
2016-07-121610-904-11561.60 ppb
2016-07-121610-905-11102.20 ppb
2016-07-121610-906-0921ND
2016-07-121610-907-10421.50 ppb
2016-10-111610-900-1256ND
2016-10-111610-901-1236ND
2016-10-111610-902-1036ND
2016-10-111610-903-1148ND
2016-10-111610-904-1007ND
2016-10-111610-905-1107ND
2016-10-111610-906-1217ND
2016-10-111610-907-1126ND
2017-01-101610-900-0945ND
2017-01-101610-901-0922ND
2017-01-101610-902-1040ND
2017-01-101610-903-0801ND
2017-01-101610-904-1109ND
2017-01-101610-905-1013ND
2017-01-101610-906-0821ND
2017-01-101610-907-0854ND
2017-04-111610-900-0825ND
2017-04-111610-901-0850ND
2017-04-111610-902-0946ND
2017-04-111610-903-1125ND
2017-04-111610-904-1010ND
2017-04-111610-905-1035ND
2017-04-111610-906-0915ND
2017-04-111610-907-1058ND
2017-07-111610-900-08472.20 ppb
2017-07-111610-901-09333.20 ppb
2017-07-111610-902-11142.10 ppb
2017-07-111610-903-1018ND
2017-07-111610-904-11262.60 ppb
2017-07-111610-905-11002.20 ppb
2017-07-111610-906-0958ND
2017-07-111610-907-10442.20 ppb
2017-10-111610-900-08101.000 ppb
2017-10-111610-901-08391.000 ppb
2017-10-111610-902-11101.20 ppb
2017-10-111610-903-09351.20 ppb
2017-10-111610-904-11311.50 ppb
2017-10-111610-905-10451.000 ppb
2017-10-111610-906-09101.10 ppb
2017-10-111610-907-10051.20 ppb
2018-01-091610-900-12505.70 ppb
2018-01-091610-901-12217.50 ppb
2018-01-091610-902-08421.50 ppb
2018-01-091610-903-11165.00 ppb
2018-01-091610-904-09252.30 ppb
2018-01-091610-905-10003.30 ppb
2018-01-091610-906-11516.20 ppb
2018-01-091610-907-10411.10 ppb
2018-04-091610-900-08561.30 ppb
2018-04-091610-901-09191.40 ppb
2018-04-091610-902-11001.40 ppb
2018-04-091610-903-10011.40 ppb
2018-04-091610-904-1120ND
2018-04-091610-905-10411.20 ppb
2018-04-091610-906-09412.10 ppb
2018-04-091610-907-10201.60 ppb
2018-07-101610-900-1027ND
2018-07-101610-901-1008ND
2018-07-101610-902-0816ND
2018-07-101610-903-0925ND
2018-07-101610-904-0800ND
2018-07-101610-905-0851ND
2018-07-101610-906-0948ND
2018-07-101610-907-0906ND
2018-10-091610-900-1033ND
2018-10-091610-901-1001ND
2018-10-091610-902-0816ND
2018-10-091610-903-0919ND
2018-10-091610-904-0830ND
2018-10-091610-905-0850ND
2018-10-091610-906-0943ND
2018-10-091610-907-0905ND
2019-01-081610-900-0837ND
2019-01-081610-901-0900ND
2019-01-081610-902-0940ND
2019-01-081610-903-1058ND
2019-01-081610-904-1002ND
2019-01-081610-905-114214.7 ppb
2019-01-081610-906-1029ND
2019-01-081610-907-1118ND
2019-04-091610-900-1102ND
2019-04-091610-901-08162.30 ppb
2019-04-091610-902-10181.70 ppb
2019-04-091610-903-09211.70 ppb
2019-04-091610-904-1038ND
2019-04-091610-905-09592.20 ppb
2019-04-091610-906-08412.40 ppb
2019-04-091610-907-0940ND
2019-07-091610-900-0800ND
2019-07-091610-901-0825ND
2019-07-091610-902-1025ND
2019-07-091610-903-0920ND
2019-07-091610-904-1041ND
2019-07-091610-905-1006ND
2019-07-091610-906-0855ND
2019-07-091610-907-0942ND
2019-10-081610-900-0749ND
2019-10-081610-901-08191.70 ppb
2019-10-081610-902-1027ND
2019-10-081610-903-0920ND
2019-10-081610-904-1045ND
2019-10-081610-905-0958ND
2019-10-081610-906-0859ND
2019-10-081610-907-0939ND