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EWG's Tap Water Database — 2021 UPDATE

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Trichloroethylene

Hillview Water Company-oakhurst/sierra Lakes

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND130ND
2016ND220ND
2017ND110ND
2018ND230ND
2019ND120ND

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
2014-01-225810-017-1120ND
2014-01-225810-028-1520ND
2014-04-175810-017-1442ND
2014-04-175810-028-1432ND
2014-07-235810-017-0940ND
2014-07-235810-028-1000ND
2014-10-165810-017-1325ND
2014-10-215810-028-1515ND
2014-11-055810-028-1125ND
2014-11-105810-017-0800ND
2014-12-015810-028-0750ND
2014-12-015810-017-0805ND
2015-01-055810-028-0743ND
2015-01-055810-017-0753ND
2015-02-095810-017-1117ND
2015-02-095810-028-1125ND
2015-04-205810-017-1134ND
2015-04-205810-028-1143ND
2015-05-195810-028-1010ND
2015-05-195810-017-0850ND
2015-06-085810-017-1504ND
2015-07-145810-028-0958ND
2015-07-145810-017-0935ND
2015-10-065810-028-1030ND
2015-10-065810-017-1013ND
2016-01-195810-028-1125ND
2016-01-195810-017-1114ND
2016-04-185810-017-1040ND
2016-04-185810-028-1055ND
2016-07-195810-017-1500ND
2016-07-195810-028-1056ND
2016-09-195810-003-1549ND
2016-09-195810-032-1610ND
2016-09-195810-001-1535ND
2016-10-185810-017-1434ND
2016-10-185810-028-1450ND
2016-11-085810-007-1337ND
2016-11-085810-002-1025ND
2016-11-165810-009-0936ND
2016-12-205810-034-1128ND
2016-12-205810-033-1102ND
2016-12-205810-039-1325ND
2016-12-205810-040-1342ND
2016-12-205810-031-1050ND
2016-12-205810-030-1038ND
2016-12-205810-041-1420ND
2016-12-205810-010-0939ND
2017-01-165810-028-1540ND
2017-01-165810-017-1550ND
2017-04-115810-028-1422ND
2017-04-115810-017-1409ND
2017-07-115810-017-1535ND
2017-07-125810-028-1058ND
2017-08-155810-041-1626ND
2017-08-155810-040-1608ND
2017-08-155810-039-1555ND
2017-10-175810-028-1340ND
2017-10-175810-017-1329ND
2018-01-025810-028-1622ND
2018-01-025810-017-1611ND
2018-04-035810-017-1510ND
2018-04-035810-028-1523ND
2018-04-305810-047-1410ND
2018-04-305810-048-1432ND
2018-04-305810-046-1410ND
2018-05-235810-024-1020ND
2018-05-255810-046-0932ND
2018-05-255810-046-1000ND
2018-07-105810-024-1515ND
2018-07-105810-046-1325ND
2018-07-105810-048-1418ND
2018-07-105810-017-1600ND
2018-07-105810-047-1445ND
2018-07-255810-009-1000ND
2018-07-315810-028-1023ND
2018-08-225810-010-1022ND
2018-10-095810-028-1323ND
2018-10-095810-017-1310ND
2018-10-105810-047-1002ND
2018-10-105810-046-0925ND
2018-10-105810-048-1041ND
2019-01-085810-047-1315ND
2019-01-085810-046-1140ND
2019-02-135810-048-0910ND
2019-09-125810-032-0832ND
2019-10-295810-001-0852ND
2019-10-295810-003-0903ND
2019-10-295810-032-0925ND
2019-12-235810-034-0831ND
2019-12-235810-033-0916ND
2019-12-305810-030-0837ND
2019-12-305810-031-0844ND
2019-12-305810-007-0849ND