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EWG's Tap Water Database — 2019 UPDATE

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Tetrachloroethylene (perchloroethylene)

Pico WD

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.

 

55

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.787 ppb154ND - 3.60 ppb
20131.57 ppb105ND - 3.90 ppb
20141.33 ppb84ND - 3.50 ppb
20151.30 ppb74ND - 2.60 ppb
20161.10 ppb85ND - 2.30 ppb
20171.11 ppb74ND - 2.30 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
2012-03-139588-006-0940ND
2012-03-139588-004-0925ND
2012-03-139588-009-0950ND
2012-03-149588-002-0930ND
2012-03-149588-011-09453.20 ppb
2012-05-089588-004-0945ND
2012-05-099588-002-0945ND
2012-05-099588-011-09553.60 ppb
2012-08-179588-009-0927ND
2012-08-179588-006-0914ND
2012-08-179588-011-08582.70 ppb
2012-08-219588-004-0810ND
2012-12-129588-011-10192.30 ppb
2012-12-129588-009-0937ND
2012-12-129588-004-1132ND
2013-01-309588-011-08503.80 ppb
2013-03-219588-009-0942ND
2013-03-219588-006-0930ND
2013-03-269588-004-1140ND
2013-03-269588-011-09552.80 ppb
2013-03-269588-002-1040ND
2013-06-269588-011-09002.90 ppb
2013-09-309588-011-09302.30 ppb
2013-12-069588-011-13203.90 ppb
2013-12-139588-006-1015ND
2014-01-069588-011-07452.80 ppb
2014-03-209588-002-0930ND
2014-03-209588-006-1000ND
2014-03-209588-009-1008ND
2014-03-209588-004-0936ND
2014-06-209588-011-09503.50 ppb
2014-08-229588-011-10052.30 ppb
2014-10-239588-011-09402.00 ppb
2015-03-189588-004-0831ND
2015-03-189588-006-0819ND
2015-03-189588-009-0806ND
2015-03-189588-011-07552.60 ppb
2015-06-229588-011-08372.40 ppb
2015-08-269588-011-09572.20 ppb
2015-12-239588-011-08231.90 ppb
2016-02-259588-011-08002.30 ppb
2016-03-149588-009-0915ND
2016-03-239588-004-0802ND
2016-03-239588-006-0816ND
2016-05-099588-011-08282.10 ppb
2016-08-109588-011-08251.70 ppb
2016-11-309588-011-08001.40 ppb
2016-12-229588-011-08371.30 ppb
2017-02-239588-011-08401.90 ppb
2017-03-209588-009-0910ND
2017-03-209588-004-1000ND
2017-03-209588-006-0920ND
2017-05-089588-011-08152.30 ppb
2017-08-249588-011-09242.00 ppb
2017-11-229588-011-08501.60 ppb