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EWG's Tap Water Database — 2021 UPDATE

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Tetrachloroethylene (perchloroethylene)

Sunny Slope Water Company

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.

MORE ABOUT THIS CONTAMINANT

 

236

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015ND270ND
2016ND520ND
2017ND520ND
2018ND520ND
2019ND530ND

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
2015-06-293761-024-1142ND
2015-07-063761-024-1206ND
2015-07-133761-024-1144ND
2015-07-203761-024-1154ND
2015-07-273761-024-1134ND
2015-08-033761-024-1222ND
2015-08-103761-024-1127ND
2015-08-173761-024-1113ND
2015-08-243761-024-0926ND
2015-08-313761-024-1145ND
2015-09-083761-024-1212ND
2015-09-143761-024-1145ND
2015-09-213761-024-0926ND
2015-09-283761-024-0930ND
2015-10-053761-024-0912ND
2015-10-123761-024-0920ND
2015-10-193761-024-0942ND
2015-10-263761-024-0936ND
2015-11-023761-024-0942ND
2015-11-093761-024-0936ND
2015-11-163761-024-0925ND
2015-11-233761-024-0934ND
2015-11-303761-024-0953ND
2015-12-073761-024-0930ND
2015-12-143761-024-1131ND
2015-12-213761-024-1138ND
2015-12-283761-024-1140ND
2016-01-043761-024-0943ND
2016-01-113761-024-1151ND
2016-01-183761-024-0930ND
2016-01-253761-024-0940ND
2016-02-013761-024-0930ND
2016-02-083761-024-0920ND
2016-02-163761-024-0930ND
2016-02-223761-024-0922ND
2016-02-293761-024-0938ND
2016-03-073761-024-0930ND
2016-03-143761-024-0936ND
2016-03-223761-024-0934ND
2016-03-283761-024-0928ND
2016-04-043761-024-0926ND
2016-04-113761-024-0918ND
2016-04-183761-024-0944ND
2016-04-253761-024-0925ND
2016-05-023761-024-0953ND
2016-05-093761-024-0927ND
2016-05-163761-024-0933ND
2016-05-233761-024-0934ND
2016-05-313761-024-0935ND
2016-06-063761-024-0946ND
2016-06-133761-024-0934ND
2016-06-203761-024-0931ND
2016-06-273761-024-0944ND
2016-07-053761-024-1005ND
2016-07-113761-024-0947ND
2016-07-183761-024-0937ND
2016-07-253761-024-1224ND
2016-08-013761-024-0936ND
2016-08-083761-024-0942ND
2016-08-153761-024-0950ND
2016-08-223761-024-0957ND
2016-08-293761-024-0932ND
2016-09-063761-024-0945ND
2016-09-123761-024-1011ND
2016-09-193761-024-0950ND
2016-09-263761-024-0944ND
2016-10-033761-024-0930ND
2016-10-103761-024-1156ND
2016-10-173761-024-0941ND
2016-10-243761-024-1004ND
2016-10-313761-024-0948ND
2016-11-073761-024-0918ND
2016-11-143761-024-0913ND
2016-11-213761-024-0929ND
2016-11-283761-024-0947ND
2016-12-053761-024-0909ND
2016-12-123761-024-1158ND
2016-12-193761-024-0924ND
2016-12-273761-024-0933ND
2017-01-033761-024-0926ND
2017-01-093761-024-0930ND
2017-01-163761-024-0917ND
2017-01-233761-024-0925ND
2017-01-303761-024-1143ND
2017-02-063761-024-1008ND
2017-02-133761-024-1204ND
2017-02-213761-024-0939ND
2017-02-273761-024-1208ND
2017-03-063761-024-0932ND
2017-03-133761-024-0948ND
2017-03-203761-024-0941ND
2017-03-273761-024-0950ND
2017-04-033761-024-0945ND
2017-04-103761-024-0945ND
2017-04-173761-024-0947ND
2017-04-243761-024-0928ND
2017-05-013761-024-0827ND
2017-05-083761-024-0938ND
2017-05-153761-024-0931ND
2017-05-223761-024-0913ND
2017-05-303761-024-0932ND
2017-06-053761-024-0945ND
2017-06-123761-024-0927ND
2017-06-193761-024-0945ND
2017-06-263761-024-0925ND
2017-07-053761-024-0934ND
2017-07-103761-024-0938ND
2017-07-173761-024-0945ND
2017-07-243761-024-0934ND
2017-07-313761-024-0935ND
2017-08-073761-024-0943ND
2017-08-143761-024-1000ND
2017-08-213761-024-0935ND
2017-08-283761-024-0920ND
2017-09-053761-024-0932ND
2017-09-113761-024-0930ND
2017-09-183761-024-0945ND
2017-09-253761-024-0935ND
2017-10-023761-024-0952ND
2017-10-093761-024-0916ND
2017-10-163761-024-0945ND
2017-10-233761-024-0923ND
2017-10-303761-024-0937ND
2017-11-063761-024-0815ND
2017-11-133761-024-0950ND
2017-11-203761-024-1207ND
2017-11-273761-024-0925ND
2017-12-043761-024-0947ND
2017-12-113761-024-0957ND
2017-12-183761-024-0855ND
2017-12-273761-024-0939ND
2018-01-023761-024-0955ND
2018-01-083761-024-1156ND
2018-01-153761-024-1206ND
2018-01-223761-024-0932ND
2018-01-293761-024-0921ND
2018-02-053761-024-0936ND
2018-02-123761-024-0938ND
2018-02-203761-024-1208ND
2018-02-263761-024-0946ND
2018-03-053761-024-1202ND
2018-03-123761-024-1400ND
2018-03-193761-024-1020ND
2018-03-263761-024-0953ND
2018-04-023761-024-1308ND
2018-04-093761-024-1003ND
2018-04-163761-024-0936ND
2018-04-233761-024-0912ND
2018-04-303761-024-0932ND
2018-05-073761-024-0950ND
2018-05-143761-024-0942ND
2018-05-213761-024-0930ND
2018-05-293761-024-0927ND
2018-06-043761-024-0950ND
2018-06-113761-024-0850ND
2018-06-183761-024-0950ND
2018-06-253761-024-0943ND
2018-07-023761-024-0932ND
2018-07-093761-024-1015ND
2018-07-163761-024-0941ND
2018-07-233761-024-0951ND
2018-07-303761-024-0948ND
2018-08-063761-024-1137ND
2018-08-133761-024-0938ND
2018-08-203761-024-0949ND
2018-08-273761-024-0959ND
2018-09-043761-024-0945ND
2018-09-103761-024-0931ND
2018-09-173761-024-1242ND
2018-09-243761-024-0930ND
2018-10-013761-024-1013ND
2018-10-083761-024-0952ND
2018-10-153761-024-0936ND
2018-10-223761-024-0946ND
2018-10-293761-024-1235ND
2018-11-053761-024-0953ND
2018-11-123761-024-1214ND
2018-11-193761-024-0949ND
2018-11-263761-024-1218ND
2018-12-033761-024-0957ND
2018-12-103761-024-1002ND
2018-12-173761-024-0944ND
2018-12-263761-024-1225ND
2019-01-023761-024-1302ND
2019-01-073761-024-1020ND
2019-01-143761-024-0941ND
2019-01-213761-024-0951ND
2019-01-283761-024-1000ND
2019-02-043761-024-0944ND
2019-02-113761-024-1230ND
2019-02-193761-024-0950ND
2019-02-253761-024-1238ND
2019-03-043761-024-0900ND
2019-03-113761-024-1234ND
2019-03-183761-024-0938ND
2019-03-253761-024-0940ND
2019-04-013761-024-1400ND
2019-04-083761-024-0940ND
2019-04-153761-024-0940ND
2019-04-223761-024-0952ND
2019-04-293761-024-1004ND
2019-05-063761-024-0943ND
2019-05-133761-024-0946ND
2019-05-203761-024-1257ND
2019-05-283761-024-1244ND
2019-06-033761-024-1018ND
2019-06-103761-024-0955ND
2019-06-173761-024-0947ND
2019-06-243761-024-0946ND
2019-07-013761-024-1411ND
2019-07-083761-024-0929ND
2019-07-153761-024-0950ND
2019-07-223761-024-0958ND
2019-07-293761-024-1248ND
2019-08-053761-024-0943ND
2019-08-123761-024-0950ND
2019-08-193761-024-1008ND
2019-08-263761-024-1011ND
2019-09-033761-024-1030ND
2019-09-093761-024-0935ND
2019-09-163761-024-1009ND
2019-09-233761-024-1249ND
2019-09-303761-024-0952ND
2019-10-073761-024-1103ND
2019-10-143761-024-1008ND
2019-10-213761-024-0955ND
2019-10-283761-024-0947ND
2019-11-043761-024-0940ND
2019-11-113761-024-0957ND
2019-11-183761-024-0954ND
2019-11-253761-024-1016ND
2019-12-023761-024-0955ND
2019-12-093761-024-0928ND
2019-12-163761-024-0946ND
2019-12-233761-024-0945ND
2019-12-303761-024-1232ND