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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Indio Water Authority

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

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
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-219590-803-1330ND
2014-01-219590-801-0835ND
2014-01-219590-802-0940ND
2014-01-219590-804-1100ND
2014-04-229590-804-1400ND
2014-04-229590-803-1330ND
2014-04-229590-802-1045ND
2014-04-229590-801-0915ND
2014-07-169590-804-1200ND
2014-07-169590-803-1230ND
2014-07-169590-802-1320ND
2014-07-169590-801-1300ND
2014-10-219590-803-1145ND
2014-10-219590-802-0835ND
2014-10-219590-804-1010ND
2014-10-219590-801-0735ND
2015-01-209590-804-1150ND
2015-01-209590-803-1350ND
2015-01-209590-802-1025ND
2015-01-209590-801-0920ND
2015-04-079590-804-1020ND
2015-04-079590-803-1250ND
2015-04-079590-801-0835ND
2015-04-079590-802-0930ND
2015-07-299590-801-0730ND
2015-07-299590-804-1050ND
2015-07-299590-803-1320ND
2015-07-299590-802-0905ND
2015-10-159590-802-1330ND
2015-10-159590-801-1230ND
2015-10-159590-804-1130ND
2015-10-159590-803-1110ND
2016-01-269590-802-1100ND
2016-01-269590-801-1000ND
2016-01-269590-804-1405ND
2016-01-269590-803-1345ND
2016-04-279590-802-0940ND
2016-04-279590-801-0830ND
2016-04-279590-804-1200ND
2016-04-279590-803-1330ND
2016-07-199590-804-1200ND
2016-07-199590-802-1015ND
2016-07-199590-801-0800ND
2016-07-199590-803-1235ND
2016-10-259590-804-1245ND
2016-10-259590-802-0940ND
2016-10-259590-803-1215ND
2016-10-259590-801-0810ND
2017-01-189590-803-1310ND
2017-01-189590-804-1235ND
2017-01-189590-802-1015ND
2017-01-189590-801-0855ND
2017-04-269590-803-1150ND
2017-04-269590-801-0750ND
2017-04-269590-802-0855ND
2017-04-269590-804-1120ND
2017-07-259590-801-0840ND
2017-07-259590-802-1010ND
2017-07-259590-804-1210ND
2017-07-259590-803-1135ND
2017-10-259590-804-1245ND
2017-10-259590-801-0945ND
2017-10-259590-803-1315ND
2017-10-259590-802-1045ND
2018-01-249590-804-1245ND
2018-01-249590-801-0900ND
2018-01-249590-802-1030ND
2018-01-249590-803-1320ND
2018-04-119590-802-0950ND
2018-04-119590-803-1030ND
2018-04-119590-804-1050ND
2018-04-119590-801-0920ND
2018-07-189590-802-1055ND
2018-07-189590-804-1310ND
2018-07-189590-803-1230ND
2018-07-189590-801-0945ND
2018-10-299590-802-0910ND
2018-10-299590-804-1150ND
2018-10-299590-803-1210ND
2018-10-299590-801-1000ND
2019-01-229590-801-0900ND
2019-01-229590-803-1210ND
2019-01-229590-802-0940ND
2019-01-229590-804-1105ND
2019-04-109590-801-0945ND
2019-04-109590-803-1110ND
2019-04-109590-804-1130ND
2019-04-109590-802-1020ND
2019-07-189590-804-1045ND
2019-07-189590-803-1025ND
2019-07-189590-801-0820ND
2019-07-189590-802-0950ND
2019-10-099590-804-0840ND
2019-10-099590-803-0915ND
2019-10-099590-801-1050ND
2019-10-099590-802-1215ND