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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Coachella 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

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND160ND
2016ND120ND
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
2014-04-074790-804-0845ND
2014-04-074790-803-0815ND
2014-04-074790-802-0745ND
2014-04-074790-801-0715ND
2014-07-074790-804-0857ND
2014-07-074790-803-0920ND
2014-07-074790-802-0840ND
2014-07-074790-801-0815ND
2014-10-064790-804-0845ND
2014-10-064790-803-0830ND
2014-10-064790-802-0755ND
2014-10-064790-801-0815ND
2015-01-124790-802-0815ND
2015-01-124790-803-0930ND
2015-01-124790-804-0900ND
2015-01-124790-801-0838ND
2015-04-134790-804-0945ND
2015-04-134790-803-0925ND
2015-04-134790-802-0750ND
2015-04-134790-801-0810ND
2015-07-134790-802-0825ND
2015-07-134790-801-0840ND
2015-07-134790-804-0915ND
2015-07-134790-803-0930ND
2015-10-124790-804-0725ND
2015-10-124790-802-0756ND
2015-10-124790-801-0830ND
2015-10-124790-803-0900ND
2016-01-114790-801-0920ND
2016-01-114790-804-0940ND
2016-01-114790-803-1000ND
2016-01-114790-802-0850ND
2016-07-114790-801-0810ND
2016-07-114790-804-0835ND
2016-07-114790-803-0850ND
2016-07-114790-802-0755ND
2016-10-104790-802-0830ND
2016-10-104790-801-0850ND
2016-10-104790-804-0950ND
2016-10-104790-803-0945ND
2017-01-094790-802-1100ND
2017-01-094790-804-1115ND
2017-01-094790-803-1130ND
2017-01-094790-801-1030ND
2017-04-104790-804-0900ND
2017-04-104790-803-0845ND
2017-04-104790-801-0830ND
2017-04-104790-802-0815ND
2017-07-104790-801-0810ND
2017-07-104790-802-0830ND
2017-07-104790-804-0900ND
2017-07-104790-803-0920ND
2017-10-104790-803-0930ND
2017-10-104790-804-0940ND
2017-10-104790-801-0915ND
2017-10-104790-802-0850ND
2018-01-084790-803-0910ND
2018-01-084790-804-0950ND
2018-01-084790-801-0850ND
2018-01-084790-802-0825ND
2018-04-164790-801-0730ND
2018-04-164790-804-0830ND
2018-04-164790-802-0800ND
2018-04-164790-803-0900ND
2018-07-064790-802-1400ND
2018-07-064790-801-1320ND
2018-07-064790-804-1425ND
2018-07-064790-803-1335ND
2018-10-054790-801-1220ND
2018-10-054790-802-1200ND
2018-10-054790-804-1255ND
2018-10-054790-803-1230ND
2019-01-144790-804-0746ND
2019-01-144790-802-0906ND
2019-01-144790-803-1003ND
2019-01-144790-801-0936ND
2019-04-224790-804-1025ND
2019-04-224790-803-1340ND
2019-04-224790-802-1100ND
2019-04-224790-801-1255ND
2019-07-154790-801-0910ND
2019-07-154790-804-1100ND
2019-07-154790-803-1145ND
2019-07-154790-802-1120ND
2019-10-075810-801-0730ND
2019-10-075810-804-0830ND
2019-10-075810-803-0800ND
2019-10-075810-802-0900ND