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EWG's Tap Water Database — 2021 UPDATE

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Tetrachloroethylene (perchloroethylene)

Golden State Water Company - Cordova

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

 

172

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0632 ppb313ND - 0.860 ppb
2015ND270ND
2016ND290ND
20170.0204 ppb261ND - 0.530 ppb
20180.0562 ppb293ND - 0.560 ppb
2019ND300ND

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
2014-01-142706-008-10500.580 ppb
2014-01-142706-010-1140ND
2014-01-142706-019-1020ND
2014-01-142706-022-0845ND
2014-01-142706-028-0920ND
2014-01-142706-029-1305ND
2014-01-142706-030-0945ND
2014-01-142706-051-1210ND
2014-03-042706-051-1121ND
2014-04-022706-008-13400.860 ppb
2014-04-022706-019-1238ND
2014-04-022706-022-1240ND
2014-04-022706-028-1012ND
2014-04-022706-030-1307ND
2014-04-082706-010-1325ND
2014-04-082706-051-1350ND
2014-07-152706-008-12350.520 ppb
2014-07-152706-010-1314ND
2014-07-152706-019-1154ND
2014-07-152706-022-1105ND
2014-07-152706-028-1128ND
2014-07-152706-029-1410ND
2014-07-152706-030-1100ND
2014-07-152706-051-1328ND
2014-10-142706-008-1255ND
2014-10-142706-019-1203ND
2014-10-142706-028-1114ND
2014-10-142706-030-1135ND
2014-10-212706-010-1055ND
2014-10-212706-051-1116ND
2014-10-282706-022-0900ND
2015-01-132706-008-1109ND
2015-01-132706-010-1157ND
2015-01-132706-019-1023ND
2015-01-132706-022-0930ND
2015-01-132706-028-0940ND
2015-01-132706-030-0910ND
2015-01-132706-051-1233ND
2015-04-082706-008-1325ND
2015-04-082706-022-1110ND
2015-04-142706-010-1220ND
2015-04-142706-028-1300ND
2015-04-142706-030-1330ND
2015-04-142706-051-1135ND
2015-07-072706-008-0950ND
2015-07-072706-022-0900ND
2015-07-072706-051-1205ND
2015-07-142706-010-1355ND
2015-07-142706-019-1143ND
2015-07-142706-028-0957ND
2015-07-142706-030-1112ND
2015-10-062706-010-1235ND
2015-10-062706-022-0915ND
2015-10-062706-051-1155ND
2015-10-202706-008-1210ND
2015-10-202706-019-1120ND
2015-10-202706-028-1005ND
2015-10-202706-030-1040ND
2016-02-022706-008-1035ND
2016-02-022706-022-0920ND
2016-02-022706-051-1220ND
2016-02-099590-010-1155ND
2016-02-099590-019-1040ND
2016-02-099590-028-0955ND
2016-02-099590-030-0925ND
2016-04-052706-008-0950ND
2016-04-052706-022-0900ND
2016-04-122706-010-1155ND
2016-04-122706-019-1035ND
2016-04-122706-028-0915ND
2016-04-122706-030-0950ND
2016-04-122706-051-1225ND
2016-07-052706-008-1010ND
2016-07-052706-010-1055ND
2016-07-052706-022-0920ND
2016-07-122706-019-1300ND
2016-07-122706-028-1220ND
2016-07-122706-030-1245ND
2016-07-122706-051-0943ND
2016-09-202706-029-1305ND
2016-10-042706-008-1005ND
2016-10-042706-022-0920ND
2016-10-112706-010-1250ND
2016-10-112706-019-1140ND
2016-10-112706-028-0940ND
2016-10-112706-030-1015ND
2016-10-182706-051-1200ND
2017-02-239590-019-1050ND
2017-02-239590-028-0908ND
2017-02-239590-030-0955ND
2017-03-079590-051-1144ND
2017-04-259590-008-1110ND
2017-04-259590-019-1030ND
2017-04-259590-051-1150ND
2017-05-029590-028-1112ND
2017-05-059590-010-1413ND
2017-05-099590-030-1258ND
2017-05-259590-022-1010ND
2017-07-189590-008-1218ND
2017-07-189590-010-1307ND
2017-07-189590-019-0729ND
2017-07-189590-028-0828ND
2017-07-189590-030-0750ND
2017-07-189590-051-1335ND
2017-07-259590-022-1325ND
2017-10-039590-008-1008ND
2017-10-039590-022-0934ND
2017-10-109590-008-09230.530 ppb
2017-10-109590-010-1009ND
2017-10-109590-051-1044ND
2017-10-179590-019-1122ND
2017-10-179590-028-0950ND
2017-10-179590-030-0938ND
2018-01-109590-010-1419ND
2018-01-109590-019-1215ND
2018-01-109590-028-1139ND
2018-01-109590-030-1110ND
2018-03-069590-008-12110.550 ppb
2018-03-069590-051-1055ND
2018-04-039590-008-12380.560 ppb
2018-04-039590-010-1221ND
2018-04-039590-019-1419ND
2018-04-039590-028-1339ND
2018-04-039590-030-1309ND
2018-04-039590-051-1150ND
2018-05-019590-022-0906ND
2018-07-109590-008-09270.520 ppb
2018-07-109590-010-0958ND
2018-07-109590-019-1057ND
2018-07-109590-022-0846ND
2018-07-109590-028-1134ND
2018-07-109590-030-1155ND
2018-07-109590-051-1020ND
2018-08-219590-029-1044ND
2018-10-099590-008-1129ND
2018-10-099590-010-1111ND
2018-10-099590-019-1421ND
2018-10-099590-028-1321ND
2018-10-099590-030-1346ND
2018-10-099590-051-1036ND
2018-11-069590-022-0905ND
2018-11-209590-029-1129ND
2019-01-089590-008-0943ND
2019-01-089590-019-1430ND
2019-01-089590-029-1047ND
2019-01-159590-010-1254ND
2019-01-159590-022-0836ND
2019-01-159590-028-1047ND
2019-01-159590-030-1018ND
2019-01-159590-051-1325ND
2019-04-099590-008-0949ND
2019-04-099590-010-1230ND
2019-04-099590-022-0918ND
2019-04-099590-028-0757ND
2019-04-099590-029-1049ND
2019-04-099590-030-0825ND
2019-04-099590-051-1151ND
2019-04-169590-019-1026ND
2019-07-099590-008-1325ND
2019-07-099590-010-1445ND
2019-07-099590-019-1025ND
2019-07-099590-028-0935ND
2019-07-099590-029-1245ND
2019-07-099590-030-0902ND
2019-07-099590-051-1358ND
2019-07-239590-022-0800ND
2019-10-089590-008-0953ND
2019-10-089590-010-1031ND
2019-10-089590-019-1311ND
2019-10-089590-030-1236ND
2019-11-259590-028-0840ND
2019-12-039590-051-1200ND