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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Indio Water Authority

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

125

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
2015ND160ND
2016ND260ND
20170.194 ppb162ND - 2.10 ppb
2018ND240ND
2019ND270ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment 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
2014-01-219590-801-0835ND
2014-01-219590-802-0940ND
2014-01-219590-803-1330ND
2014-01-219590-804-1100ND
2014-04-229590-801-0915ND
2014-04-229590-802-1045ND
2014-04-229590-803-1330ND
2014-04-229590-804-1400ND
2014-07-169590-801-1300ND
2014-07-169590-802-1320ND
2014-07-169590-803-1230ND
2014-07-169590-804-1200ND
2014-10-219590-801-0735ND
2014-10-219590-802-0835ND
2014-10-219590-803-1145ND
2014-10-219590-804-1010ND
2015-01-209590-801-0920ND
2015-01-209590-802-1025ND
2015-01-209590-803-1350ND
2015-01-209590-804-1150ND
2015-04-079590-801-0835ND
2015-04-079590-802-0930ND
2015-04-079590-803-1250ND
2015-04-079590-804-1020ND
2015-07-299590-801-0730ND
2015-07-299590-802-0905ND
2015-07-299590-803-1320ND
2015-07-299590-804-1050ND
2015-10-159590-801-1230ND
2015-10-159590-802-1330ND
2015-10-159590-803-1110ND
2015-10-159590-804-1130ND
2016-01-269590-801-1000ND
2016-01-269590-802-1100ND
2016-01-269590-803-1345ND
2016-01-269590-804-1405ND
2016-04-279590-801-0830ND
2016-04-279590-802-0940ND
2016-04-279590-803-1330ND
2016-04-279590-804-1200ND
2016-07-199590-801-0800ND
2016-07-199590-802-1015ND
2016-07-199590-803-1235ND
2016-07-199590-804-1200ND
2016-08-229590-027-0845ND
2016-08-229590-033-1130ND
2016-08-229590-034-1005ND
2016-08-319590-004-0715ND
2016-08-319590-011-0910ND
2016-08-319590-016-1050ND
2016-08-319590-018-0930ND
2016-08-319590-019-1020ND
2016-08-319590-020-0830ND
2016-08-319590-022-0810ND
2016-10-259590-801-0810ND
2016-10-259590-802-0940ND
2016-10-259590-803-1215ND
2016-10-259590-804-1245ND
2017-01-189590-801-0855ND
2017-01-189590-802-1015ND
2017-01-189590-803-1310ND
2017-01-189590-804-1235ND
2017-04-269590-801-0750ND
2017-04-269590-802-0855ND
2017-04-269590-803-1150ND
2017-04-269590-804-1120ND
2017-07-259590-801-0840ND
2017-07-259590-802-1010ND
2017-07-259590-803-1135ND
2017-07-259590-804-12102.10 ppb
2017-10-259590-801-0945ND
2017-10-259590-802-1045ND
2017-10-259590-803-1315ND
2017-10-259590-804-12451.000 ppb
2018-01-249590-801-0900ND
2018-01-249590-802-1030ND
2018-01-249590-803-1320ND
2018-01-249590-804-1245ND
2018-02-159590-003-1330ND
2018-02-159590-008-1245ND
2018-02-159590-010-1220ND
2018-02-159590-023-1125ND
2018-04-119590-802-0950ND
2018-04-119590-803-1030ND
2018-04-119590-804-1050ND
2018-05-309590-801-0910ND
2018-05-319590-007-1200ND
2018-05-319590-017-1115ND
2018-07-189590-801-0945ND
2018-07-189590-802-1055ND
2018-07-189590-803-1230ND
2018-07-189590-804-1310ND
2018-08-289590-028-1035ND
2018-10-299590-801-1000ND
2018-10-299590-802-0910ND
2018-10-299590-803-1210ND
2018-10-299590-804-1150ND
2018-11-299590-021-1240ND
2019-01-229590-801-0900ND
2019-01-229590-802-0940ND
2019-01-229590-803-1210ND
2019-01-229590-804-1105ND
2019-04-109590-801-0945ND
2019-04-109590-802-1020ND
2019-04-109590-803-1110ND
2019-04-109590-804-1130ND
2019-04-169590-009-0445ND
2019-07-189590-801-0820ND
2019-07-189590-802-0950ND
2019-07-189590-803-1025ND
2019-07-189590-804-1045ND
2019-08-199590-027-1035ND
2019-08-219590-020-0615ND
2019-08-229590-033-1255ND
2019-08-269590-004-0730ND
2019-08-269590-016-1005ND
2019-08-269590-018-0950ND
2019-08-269590-022-1709ND
2019-08-279590-034-0625ND
2019-08-289590-011-0730ND
2019-08-289590-019-0845ND
2019-10-099590-801-1050ND
2019-10-099590-802-1215ND
2019-10-099590-803-0915ND
2019-10-099590-804-0840ND