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EWG's Tap Water Database — 2021 UPDATE

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Tetrachloroethylene (perchloroethylene)

Calleguas Municipal Water District

Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries. Read More.

The EPA considers tetrachloroethylene a likely human carcinogen. It has been linked with increased incidence of lung, breast and colon cancers. Tetrachloroethylene also damages the liver, kidneys and central nervous system. The California public health goal of 0.06 parts per billion, set to protect against cancer, is 80 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion.

Click here to read more about carcinogenic VOCs.

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND90ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND70ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for tetrachloroethylene was defined 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. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for tetrachloroethylene, established in 1991, 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 due to tetrachloroethylene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-105867-010-1130ND
2014-01-105867-006-0945ND
2014-03-215867-007-1125ND
2014-04-115867-009-1010ND
2014-04-185867-011-1030ND
2014-05-075867-004-0915ND
2014-11-185867-008-1315ND
2015-02-025867-004-0815ND
2015-02-195867-017-1415ND
2015-02-265867-004-1045ND
2015-10-215867-014-1020ND
2015-10-275867-016-1130ND
2015-10-275867-015-1300ND
2015-10-275867-012-1030ND
2015-11-045867-004-1340ND
2015-11-055867-013-1140ND
2016-04-045867-004-0840ND
2016-04-055867-023-1000ND
2016-04-055867-022-0930ND
2016-04-065867-021-1150ND
2016-04-065867-020-1305ND
2016-04-065867-019-1030ND
2016-04-065867-018-1100ND
2016-11-075867-004-0745ND
2017-03-215867-004-1040ND
2017-04-175867-009-1245ND
2017-04-175867-008-1005ND
2017-04-185867-006-1130ND
2017-04-195867-011-1050ND
2017-10-165867-004-0855ND
2017-11-065867-007-1015ND
2017-11-065867-010-1120ND
2018-02-135867-016-0945ND
2018-02-135867-015-1050ND
2018-02-265867-004-0915ND
2018-03-075867-013-1320ND
2018-03-085867-014-1330ND
2018-03-085867-012-1000ND
2018-04-305867-017-1030ND
2018-11-055867-004-0820ND
2019-01-295867-004-0930ND
2019-02-045867-018-0945ND
2019-02-055867-022-1020ND
2019-02-055867-023-0945ND
2019-02-075867-020-0840ND
2019-02-195867-019-1100ND
2019-11-045867-004-0800ND