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EWG's Tap Water Database — 2021 UPDATE

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Trichloroethylene

Golden State Water Company (GSWC) - Claremont

Trichloroethylene, an industrial solvent and common groundwater pollutant, damages the immune system, harms the developing fetus and causes cancer. Read More.

Trichloroethylene was once commonly used to remove grease from metal parts, such as steel pipes and engines, and as a solvent in dry cleaning and carpet cleaning products. Drinking trichloroethylene-contaminated drinking water has been linked with birth defects, leukemia, and liver and kidney damage. Trichloroethylene is highly volatile and can enter indoor air through water in pipes. If trichloroethylene is present, people can inhale it while bathing, washing dishes and doing other household activities that involve water.

Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

 

178

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND320ND
20150.0286 ppb281ND - 0.800 ppb
20160.165 ppb344ND - 2.40 ppb
20170.0534 ppb292ND - 0.920 ppb
20180.104 ppb264ND - 0.730 ppb
20190.0628 ppb293ND - 0.680 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for trichloroethylene was defined by the state of Minnesota as health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the developing fetus and damage to the immune system.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for trichloroethylene, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-142706-047-0952ND
2014-01-282706-047-1154ND
2014-02-112706-047-1308ND
2014-02-182706-006-1055ND
2014-02-252706-047-1237ND
2014-03-112706-047-0950ND
2014-05-132706-047-1252ND
2014-05-282706-047-0920ND
2014-06-102706-047-0931ND
2014-06-242706-047-1337ND
2014-07-082706-047-1413ND
2014-07-222706-047-1226ND
2014-08-132706-047-0913ND
2014-08-192706-002-0829ND
2014-08-192706-017-1302ND
2014-08-192706-039-0815ND
2014-08-202706-019-1007ND
2014-08-202706-020-0950ND
2014-08-202706-021-1037ND
2014-08-202706-022-1025ND
2014-08-202706-024-1055ND
2014-08-262706-047-0843ND
2014-09-092706-047-0917ND
2014-09-232706-047-0847ND
2014-09-292706-010-1215ND
2014-10-142706-047-1225ND
2014-10-282706-047-0945ND
2014-11-042706-030-1218ND
2014-11-102706-047-1345ND
2014-11-182706-040-1022ND
2014-12-092706-047-1334ND
2014-12-222706-047-0932ND
2015-01-132706-047-1149ND
2015-01-272706-047-1030ND
2015-02-102706-047-1039ND
2015-02-242706-047-0946ND
2015-03-102706-047-0920ND
2015-03-242706-047-1015ND
2015-04-142706-047-0929ND
2015-04-272706-047-1210ND
2015-05-122706-047-1132ND
2015-05-262706-047-1035ND
2015-06-092706-047-09550.800 ppb
2015-06-122706-047-0940ND
2015-06-232706-047-0930ND
2015-07-282706-047-0847ND
2015-08-112706-047-0933ND
2015-08-172706-006-1049ND
2015-08-172706-021-1114ND
2015-08-172706-030-1014ND
2015-08-262706-047-1056ND
2015-09-082706-047-0955ND
2015-09-222706-047-0936ND
2015-10-132706-047-1309ND
2015-10-272706-047-1055ND
2015-11-042706-019-1353ND
2015-11-102706-047-1357ND
2015-11-252706-047-0928ND
2015-12-082706-047-1447ND
2015-12-212706-047-1049ND
2016-01-122706-047-0948ND
2016-01-262706-047-09060.500 ppb
2016-02-084790-047-0928ND
2016-02-232706-047-0912ND
2016-03-082706-047-1014ND
2016-03-232706-047-1041ND
2016-04-122706-047-0958ND
2016-04-262706-047-1215ND
2016-05-102706-047-1021ND
2016-05-232706-047-1220ND
2016-06-072706-047-1252ND
2016-06-212706-047-0925ND
2016-07-062706-047-1144ND
2016-07-202706-047-1118ND
2016-08-022706-047-0920ND
2016-08-162706-047-0843ND
2016-08-232706-010-0856ND
2016-08-232706-017-1043ND
2016-08-232706-019-1032ND
2016-08-232706-030-1020ND
2016-08-232706-039-0845ND
2016-08-232706-040-1000ND
2016-09-062706-047-1027ND
2016-09-202706-047-1020ND
2016-09-282706-031-0904ND
2016-10-042706-047-1305ND
2016-10-142706-031-1111ND
2016-10-202706-047-1024ND
2016-11-012706-047-1010ND
2016-11-082706-031-10481.60 ppb
2016-11-152706-031-10341.10 ppb
2016-11-172706-006-1100ND
2016-11-212706-047-1003ND
2016-12-142706-031-09442.40 ppb
2017-01-109590-031-10250.920 ppb
2017-02-149590-031-0924ND
2017-05-039590-021-1420ND
2017-05-109590-002-1136ND
2017-05-109590-024-1412ND
2017-07-289590-047-0959ND
2017-08-029590-047-1413ND
2017-08-089590-047-1228ND
2017-08-169590-010-1244ND
2017-08-169590-017-0851ND
2017-08-169590-021-0913ND
2017-08-169590-040-1025ND
2017-08-169590-047-1213ND
2017-08-239590-047-0921ND
2017-08-299590-047-1049ND
2017-09-079590-047-1220ND
2017-09-199590-006-1315ND
2017-09-199590-047-1010ND
2017-09-229590-039-1225ND
2017-10-059590-047-1017ND
2017-11-019590-047-1407ND
2017-11-099590-047-1006ND
2017-11-219590-040-13180.630 ppb
2017-11-219590-047-1334ND
2017-12-019590-022-1310ND
2017-12-019590-040-0840ND
2017-12-019590-040-0844ND
2017-12-059590-047-1157ND
2017-12-199590-047-1053ND
2018-01-109590-047-1227ND
2018-02-069590-019-1137ND
2018-02-139590-047-0820ND
2018-03-139590-047-0859ND
2018-04-109590-047-1229ND
2018-05-089590-047-1010ND
2018-05-159590-002-1034ND
2018-05-159590-024-1130ND
2018-06-129590-047-1124ND
2018-07-109590-047-1325ND
2018-08-149590-006-1050ND
2018-08-149590-010-1117ND
2018-08-149590-017-1045ND
2018-08-149590-019-1010ND
2018-08-149590-022-1140ND
2018-08-149590-039-1141ND
2018-08-149590-040-12270.670 ppb
2018-08-149590-047-1323ND
2018-08-169590-021-1115ND
2018-09-079590-040-10580.730 ppb
2018-09-079590-040-11050.710 ppb
2018-09-259590-047-1143ND
2018-10-099590-047-1140ND
2018-11-149590-047-1157ND
2018-11-289590-040-11530.600 ppb
2018-12-119590-047-1207ND
2019-01-089590-047-1105ND
2019-02-129590-040-1107ND
2019-02-129590-047-1223ND
2019-03-129590-047-0958ND
2019-04-099590-047-1139ND
2019-05-149590-040-11050.590 ppb
2019-05-149590-047-1153ND
2019-05-219590-002-1140ND
2019-05-249590-047-1222ND
2019-06-119590-047-0910ND
2019-07-089590-047-1244ND
2019-08-129590-040-10490.680 ppb
2019-08-129590-047-1015ND
2019-08-169590-006-0930ND
2019-08-289590-010-1132ND
2019-09-099590-010-1041ND
2019-09-099590-017-0900ND
2019-09-099590-019-1146ND
2019-09-099590-021-0923ND
2019-09-099590-039-1104ND
2019-09-099590-047-1240ND
2019-10-239590-024-1042ND
2019-10-299590-047-1122ND
2019-11-139590-040-11400.550 ppb
2019-11-139590-047-1307ND
2019-12-109590-047-1311ND
2019-12-179590-047-1132ND
2019-12-269590-047-0917ND
2019-12-309590-022-1150ND