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EWG's Tap Water Database — 2019 UPDATE

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Tetrachloroethylene (perchloroethylene)

Forrest City Waterworks

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)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.27 ppb94ND - 4.28 ppb
20131.26 ppb94ND - 3.52 ppb
20140.991 ppb94ND - 2.79 ppb
20151.53 ppb84ND - 3.89 ppb
20160.873 ppb95ND - 2.23 ppb
20170.771 ppb114ND - 2.31 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
2012-01-25120260061011.29 ppb
2012-01-2512026006001ND
2012-06-1312166002901ND
2012-06-1312166003101ND
2012-06-13121660030013.56 ppb
2012-08-27122420038012.30 ppb
2012-08-2712242003701ND
2012-10-0212278014001ND
2012-10-02122780139014.28 ppb
2013-02-1213044000801ND
2013-02-12130440009012.81 ppb
2013-04-0113094007301ND
2013-04-01130940072012.51 ppb
2013-04-0113094007101ND
2013-08-2713241000309ND
2013-08-27132410002092.47 ppb
2013-11-05133100009093.52 ppb
2013-11-0513310000809ND
2014-02-05140380007011.89 ppb
2014-02-0514038000602ND
2014-04-2314114013809ND
2014-04-2314114014002ND
2014-04-23141140143011.64 ppb
2014-08-27142400012012.60 ppb
2014-08-2714240000702ND
2014-11-24143300037012.79 ppb
2014-11-2414330003801ND
2015-01-12150150086013.89 ppb
2015-01-1215015008501ND
2015-04-08150990073013.14 ppb
2015-04-0815099007201ND
2015-08-2415238000602ND
2015-08-24152380007013.02 ppb
2015-12-0115337004801ND
2015-12-01153370049012.18 ppb
2016-02-16160490054012.23 ppb
2016-02-1616049005301ND
2016-04-20161120076011.26 ppb
2016-04-2016112007501ND
2016-07-06161890136091.31 ppb
2016-07-0616189013509ND
2016-08-24162370047011.92 ppb
2016-10-03162790032081.14 ppb
2016-10-0316279003108ND
2017-01-1617019008401ND
2017-01-16170190085012.05 ppb
2017-04-0317096000101ND
2017-04-0317096000209ND
2017-04-03170960048012.31 ppb
2017-07-03171870070011.88 ppb
2017-07-0317187007101ND
2017-07-0317187007202ND
2017-10-0317278005801ND
2017-10-03172780057012.24 ppb
2017-10-0317278005602ND