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EWG's Tap Water Database — 2021 UPDATE

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1,1,1,2-Tetrachloroethane

Cal-water Service Company-oroville

1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.

MORE ABOUT THIS CONTAMINANT

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND90ND
2016ND100ND
2017ND90ND
2018ND90ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppb

The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-225701-009-1130ND
2014-01-225701-007-1500ND
2014-04-165701-009-1145ND
2014-04-165701-007-1100ND
2014-05-225701-005-1300ND
2014-07-225701-009-1040ND
2014-07-225701-007-1400ND
2014-10-215701-009-1000ND
2014-10-215701-007-1530ND
2015-01-225701-007-1330ND
2015-01-225701-009-1110ND
2015-02-175701-005-1510ND
2015-04-215701-007-1330ND
2015-04-215701-009-1105ND
2015-07-215701-009-1120ND
2015-07-215701-007-1425ND
2015-10-205701-007-1330ND
2015-10-205701-009-1045ND
2016-01-215701-007-1335ND
2016-01-215701-009-1050ND
2016-02-175701-005-1320ND
2016-03-155701-008-1135ND
2016-04-195701-009-1050ND
2016-04-195701-007-1330ND
2016-07-195701-009-1135ND
2016-07-195701-007-1530ND
2016-10-255701-009-1440ND
2016-10-255701-007-1645ND
2017-01-245701-007-1530ND
2017-01-245701-009-1120ND
2017-04-115701-009-1330ND
2017-04-115701-007-1105ND
2017-05-235701-005-1500ND
2017-07-209590-007-1200ND
2017-07-209590-009-1000ND
2017-10-175701-007-1345ND
2017-10-175701-009-1100ND
2018-02-135701-005-1330ND
2018-02-225701-009-1025ND
2018-02-225701-007-1315ND
2018-04-119590-007-1330ND
2018-04-119590-009-1030ND
2018-07-195701-007-1310ND
2018-07-195701-009-1030ND
2018-10-165810-009-1301ND
2018-10-165810-007-1040ND
2019-01-225810-005-1000ND
2019-01-225810-900-1135ND
2019-01-225810-901-1110ND
2019-01-225810-902-1050ND
2019-01-225810-903-1030ND
2019-02-125701-005-1000ND
2019-03-195701-008-1050ND
2019-03-195701-006-1310ND
2019-03-279590-009-1330ND
2019-03-279590-007-1000ND
2019-04-115810-009-1400ND
2019-04-115810-007-1020ND
2019-07-235701-009-1430ND
2019-07-235701-007-1040ND
2019-10-155701-009-1550ND
2019-10-155701-007-1120ND