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EWG's Tap Water Database — 2021 UPDATE

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Tetrachloroethylene (perchloroethylene)

Bellaire Public Water System

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.

 

72

Samples

14

Samples exceeding legal limit (MCL)

43

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.925 ppb41ND - 3.70 ppb
2015ND40ND
20164.88 ppb85ND - 19.4 ppb
20170.493 ppb43ND - 0.800 ppb
20184.44 ppb2821ND - 20.9 ppb
20192.65 ppb2413ND - 17.3 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
2014-01-07A1401194973.70 ppb
2014-05-27A140160321ND
2014-08-12A140187051ND
2014-11-03A140191154ND
2015-01-05A150231580ND
2015-04-06A150231583ND
2015-07-09A150216587ND
2015-10-05A150328659ND
2016-01-04A160319643ND
2016-04-04A160338043ND
2016-07-04A1603746740.650 ppb
2016-09-19A1604355181.21 ppb
2016-09-19A160447266ND
2016-10-03A1604518930.580 ppb
2016-11-01A16045189519.4 ppb
2016-12-05A16045347717.2 ppb
2017-01-02A1704534780.640 ppb
2017-04-03A170477159ND
2017-07-03A1705047090.530 ppb
2017-10-09A1705399570.800 ppb
2018-04-021804015117.1 ppb
2018-04-0218040150ND
2018-04-02180401521.26 ppb
2018-05-011805015020.9 ppb
2018-05-0118050148ND
2018-05-01180501491.82 ppb
2018-06-04180603752.20 ppb
2018-06-041806037618.6 ppb
2018-06-0418060374ND
2018-07-0218070369ND
2018-07-02180703700.680 ppb
2018-07-02180703717.26 ppb
2018-08-06180811850.760 ppb
2018-08-06180811888.39 ppb
2018-08-06180811861.51 ppb
2018-08-0618081187ND
2018-09-03180916809.29 ppb
2018-09-03180916792.84 ppb
2018-09-03180916781.40 ppb
2018-10-041810162410.5 ppb
2018-10-04181016211.60 ppb
2018-10-0418101623ND
2018-11-05181115880.770 ppb
2018-11-0518111590ND
2018-11-05181115914.77 ppb
2018-12-03181216180.500 ppb
2018-12-031812161910.8 ppb
2018-12-03181216161.27 ppb
2019-02-04190212801.24 ppb
2019-02-04190212813.31 ppb
2019-02-0419021279ND
2019-04-0119041100ND
2019-04-01190411020.650 ppb
2019-04-01190411039.21 ppb
2019-05-061905094217.3 ppb
2019-05-06190409410.620 ppb
2019-05-0619050939ND
2019-06-0319061391ND
2019-06-03190613948.78 ppb
2019-06-03190613930.660 ppb
2019-07-0119071448ND
2019-07-01190714510.680 ppb
2019-07-0119071450ND
2019-07-2219073457ND
2019-07-22190734560.890 ppb
2019-08-04190818091.81 ppb
2019-08-0419081807ND
2019-08-041908181013.8 ppb
2019-09-0219091331ND
2019-09-0219091330ND
2019-09-0219091333ND
2019-09-02190913324.66 ppb