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EWG's Tap Water Database — 2019 UPDATE

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Tetrachloroethylene (perchloroethylene)

San Fernando Water Department

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.448 ppb53ND - 0.880 ppb
20130.277 ppb31ND - 0.830 ppb
20140.456 ppb53ND - 0.770 ppb
20150.559 ppb75ND - 0.900 ppb
20160.655 ppb65ND - 0.860 ppb
20170.540 ppb75ND - 0.890 ppb

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
2012-01-189590-002-1035ND
2012-01-189590-003-1000ND
2012-01-189590-004-09200.880 ppb
2012-04-029590-004-08350.680 ppb
2012-09-109590-004-09100.680 ppb
2013-01-099590-002-0940ND
2013-01-099590-003-0915ND
2013-01-099590-004-08300.830 ppb
2014-01-229590-004-08400.740 ppb
2014-01-229590-002-0905ND
2014-01-229590-003-0950ND
2014-07-159590-004-09500.770 ppb
2014-10-079590-004-09000.770 ppb
2015-01-099590-004-08550.740 ppb
2015-01-219590-004-09050.780 ppb
2015-01-219590-003-1015ND
2015-01-219590-002-0820ND
2015-04-159590-004-09050.900 ppb
2015-07-089590-004-07150.820 ppb
2015-10-149590-004-07400.670 ppb
2016-01-159590-004-08300.780 ppb
2016-02-179590-002-0920ND
2016-02-179590-004-09000.770 ppb
2016-04-139590-004-08200.800 ppb
2016-07-059590-004-09150.860 ppb
2016-10-059590-004-08450.720 ppb
2017-01-189590-004-09000.810 ppb
2017-01-259590-004-08000.890 ppb
2017-01-259590-003-0855ND
2017-01-259590-002-0715ND
2017-04-059590-004-09200.620 ppb
2017-07-059590-004-09100.770 ppb
2017-10-249590-004-07150.690 ppb