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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Tulare

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

 

107

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.338 ppb161ND - 5.40 ppb
2015ND160ND
2016ND160ND
2017ND190ND
20180.240 ppb202ND - 2.80 ppb
20190.255 ppb202ND - 2.60 ppb

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
2014-03-115810-900-0830ND
2014-03-115810-901-0800ND
2014-03-115810-902-0910ND
2014-03-115810-903-09505.40 ppb
2014-06-105810-900-0730ND
2014-06-105810-901-0715ND
2014-06-105810-902-0800ND
2014-06-105810-903-0745ND
2014-08-135810-900-0830ND
2014-08-135810-901-1100ND
2014-08-135810-902-0930ND
2014-08-135810-903-1000ND
2014-12-095810-900-0830ND
2014-12-095810-901-0815ND
2014-12-095810-902-0845ND
2014-12-095810-903-0900ND
2015-03-125810-900-0830ND
2015-03-125810-901-0950ND
2015-03-125810-902-0855ND
2015-03-125810-903-0920ND
2015-06-105810-900-0945ND
2015-06-105810-901-0920ND
2015-06-105810-902-1100ND
2015-06-105810-903-1035ND
2015-09-175810-900-0700ND
2015-09-175810-902-0745ND
2015-09-175810-903-0815ND
2015-09-245810-901-1100ND
2015-12-095810-900-0830ND
2015-12-095810-901-0800ND
2015-12-095810-902-0900ND
2015-12-095810-903-0930ND
2016-03-105810-900-0800ND
2016-03-105810-901-0730ND
2016-03-105810-902-0830ND
2016-03-105810-903-0845ND
2016-06-095810-900-0825ND
2016-06-095810-901-0845ND
2016-06-095810-902-1000ND
2016-06-095810-903-1020ND
2016-09-085810-900-0840ND
2016-09-085810-901-0905ND
2016-09-085810-902-0820ND
2016-09-085810-903-0745ND
2016-12-065810-900-0820ND
2016-12-065810-901-0845ND
2016-12-065810-902-0920ND
2016-12-065810-903-1000ND
2017-03-095810-900-0810ND
2017-03-095810-901-0950ND
2017-03-095810-902-0825ND
2017-03-095810-903-0850ND
2017-06-155810-900-0728ND
2017-06-155810-901-0708ND
2017-06-155810-902-0754ND
2017-06-155810-903-0811ND
2017-06-155810-904-0830ND
2017-09-145810-900-0745ND
2017-09-145810-901-0650ND
2017-09-145810-902-0747ND
2017-09-145810-903-0807ND
2017-09-145810-904-0842ND
2017-12-145810-900-0750ND
2017-12-145810-901-0820ND
2017-12-145810-902-0846ND
2017-12-145810-903-0910ND
2017-12-145810-904-0930ND
2018-03-155810-900-0750ND
2018-03-155810-901-0815ND
2018-03-155810-902-0845ND
2018-03-155810-903-0915ND
2018-03-155810-904-0945ND
2018-06-145810-900-0720ND
2018-06-145810-901-0655ND
2018-06-145810-902-0745ND
2018-06-145810-903-0805ND
2018-06-145810-904-08302.00 ppb
2018-09-135810-900-0745ND
2018-09-135810-901-0710ND
2018-09-135810-902-0830ND
2018-09-135810-903-0855ND
2018-09-135810-904-0920ND
2018-12-135810-900-0820ND
2018-12-135810-901-0800ND
2018-12-135810-902-0845ND
2018-12-135810-903-0910ND
2018-12-135810-904-09402.80 ppb
2019-03-135810-900-0845ND
2019-03-135810-901-0815ND
2019-03-135810-902-0930ND
2019-03-135810-903-0945ND
2019-03-135810-904-1000ND
2019-06-135810-900-0730ND
2019-06-135810-901-0705ND
2019-06-135810-902-0800ND
2019-06-135810-903-0830ND
2019-06-135810-904-0845ND
2019-09-105810-900-1115ND
2019-09-105810-901-0955ND
2019-09-105810-902-1215ND
2019-09-105810-903-1230ND
2019-09-105810-904-12502.60 ppb
2019-12-125810-900-0955ND
2019-12-125810-901-0930ND
2019-12-125810-902-1025ND
2019-12-125810-903-1045ND
2019-12-125810-904-11102.50 ppb