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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

City of McPherson

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.

 

51

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
20140.725 ppb165ND - 2.80 ppb
2015ND160ND
20162.18 ppb122ND - 24.0 ppb
2017ND20ND

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 on-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
2012-07-193Q-2012-DBPND
2013-11-12605821DFND
2013-11-12605820DFND
2013-11-12605822DFND
2013-11-12605823DFND
2014-02-10601632.10 ppb
2014-02-1060164ND
2014-02-10601652.80 ppb
2014-02-1060166ND
2014-05-05109789ND
2014-05-05109790ND
2014-05-05109791ND
2014-05-05109792ND
2014-08-111711912.30 ppb
2014-08-11171190ND
2014-08-11171189ND
2014-08-11171188ND
2014-11-172329242.00 ppb
2014-11-17232927ND
2014-11-17232925ND
2014-11-172329262.40 ppb
2015-02-09277252ND
2015-02-09277249ND
2015-02-09277251ND
2015-02-09277250ND
2015-05-04328656ND
2015-05-04328654ND
2015-05-04328653ND
2015-05-04328655ND
2015-08-10385790ND
2015-08-10385789ND
2015-08-10385791ND
2015-08-10385792ND
2015-11-16427909ND
2015-11-16427908ND
2015-11-16427906ND
2015-11-16427907ND
2016-02-22497253ND
2016-02-22497250ND
2016-02-22497251ND
2016-02-22497252ND
2016-05-165477142.10 ppb
2016-05-16547716ND
2016-05-16547717ND
2016-05-16547715ND
2016-08-15604069ND
2016-08-15604068ND
2016-08-15604070ND
2016-08-1560407124.0 ppb
2017-08-21823964ND
2017-08-21823963ND