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EWG's Tap Water Database — 2019 UPDATE

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Tetrachloroethylene (perchloroethylene)

Brewster 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.

 

88

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
2014ND50ND
20150.117 ppb254ND - 0.820 ppb
20160.227 ppb265ND - 1.90 ppb
20170.0661 ppb283ND - 0.690 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 Result
2013-03-13ND
2013-03-13ND
2013-03-13ND
2013-03-13ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2015-01-13ND
2015-01-13ND
2015-05-12ND
2015-05-120.730 ppb
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-120.770 ppb
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-120.820 ppb
2015-05-12ND
2015-05-12ND
2015-05-120.610 ppb
2016-02-02ND
2016-02-021.60 ppb
2016-02-02ND
2016-02-02ND
2016-02-020.570 ppb
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-021.20 ppb
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-020.620 ppb
2016-02-021.90 ppb
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-08-12ND
2017-01-11ND
2017-01-11ND
2017-01-11ND
2017-01-11ND
2017-01-13ND
2017-01-24ND
2017-01-24ND
2017-01-240.540 ppb
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-240.620 ppb
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-240.690 ppb
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-24ND