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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Des Moines Water Works

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

 

183

Samples

0

Samples exceeding legal limit (MCL)

152

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201415.9 ppb31316.00 ppb - 42.0 ppb
20158.77 ppb22226.00 ppb - 13.0 ppb
20165.34 ppb3221ND - 12.0 ppb
201710.1 ppb3328ND - 24.0 ppb
201810.4 ppb3330ND - 25.0 ppb
20195.81 ppb3220ND - 25.0 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
2014-02-25203832616.0 ppb
2014-02-25203832833.0 ppb
2014-02-25203832916.0 ppb
2014-02-25203673123.0 ppb
2014-02-25203674131.0 ppb
2014-02-25203675024.0 ppb
2014-02-26203673223.0 ppb
2014-02-26203675124.0 ppb
2014-05-16205268112.0 ppb
2014-05-16205211342.0 ppb
2014-05-16205211416.0 ppb
2014-05-16205211513.0 ppb
2014-05-16205211718.0 ppb
2014-05-16205211816.0 ppb
2014-05-16205211916.0 ppb
2014-05-16205212016.0 ppb
2014-08-0120710309.00 ppb
2014-08-01207103110.00 ppb
2014-08-01207103214.0 ppb
2014-08-01207103312.0 ppb
2014-08-0120710348.00 ppb
2014-08-0120710368.00 ppb
2014-08-26207528420.0 ppb
2014-11-1020922417.00 ppb
2014-11-10209224211.0 ppb
2014-11-1020922446.00 ppb
2014-11-10209224513.0 ppb
2014-11-1020908457.00 ppb
2014-11-1020908489.00 ppb
2014-11-11209330210.00 ppb
2014-11-20209350010.00 ppb
2015-02-03OE2126969.00 ppb
2015-02-03OE2126976.00 ppb
2015-02-03OE21270510.00 ppb
2015-02-24OE21576010.00 ppb
2015-05-05OE23896010.00 ppb
2015-05-05OE2389616.00 ppb
2015-05-05OE2389638.00 ppb
2015-05-05OE23896510.00 ppb
2015-05-05OE2389649.00 ppb
2015-08-03OE2753369.00 ppb
2015-08-03OE2753408.00 ppb
2015-08-03OE27533811.0 ppb
2015-08-04OE27534810.00 ppb
2015-08-04OE2753498.00 ppb
2015-11-03OE3140958.00 ppb
2015-11-03OE3140966.00 ppb
2015-11-03OE31409110.00 ppb
2015-11-03OE31408913.0 ppb
2015-11-03OE3140909.00 ppb
2015-11-03OE3140929.00 ppb
2015-11-03OE3140936.00 ppb
2015-11-03OE3140948.00 ppb
2016-02-02OE34146210.00 ppb
2016-02-02OE341464ND
2016-02-02OE3414607.00 ppb
2016-02-02OE3414678.00 ppb
2016-02-02OE34146812.0 ppb
2016-02-02OE34146311.0 ppb
2016-02-02OE341469ND
2016-02-02OE3414707.00 ppb
2016-05-03OE3739507.00 ppb
2016-05-03OE373954ND
2016-05-03OE3739487.00 ppb
2016-05-03OE373952ND
2016-05-03OE373953ND
2016-05-03OE373955ND
2016-05-03OE373951ND
2016-05-03OE3739498.00 ppb
2016-08-02OE4099456.00 ppb
2016-08-02OE4099478.00 ppb
2016-08-02OE4099498.00 ppb
2016-08-02OE4099537.00 ppb
2016-08-02OE409951ND
2016-08-02OE4099508.00 ppb
2016-08-02OE4099529.00 ppb
2016-08-02OE4099487.00 ppb
2016-11-01OE447808ND
2016-11-01OE4478096.00 ppb
2016-11-01OE447811ND
2016-11-01OE4478108.00 ppb
2016-11-01OE44781211.0 ppb
2016-11-01OE44781310.00 ppb
2016-11-01OE4478146.00 ppb
2016-11-01OE447815ND
2017-02-01OE47675512.0 ppb
2017-02-01OE47675418.0 ppb
2017-02-01OE47675716.0 ppb
2017-02-01OE47674619.0 ppb
2017-02-01OE47674924.0 ppb
2017-02-01OE47675016.0 ppb
2017-02-01OE47675118.0 ppb
2017-02-01OE47675618.0 ppb
2017-05-02OE508807ND
2017-05-02OE50880917.0 ppb
2017-05-02OE5088119.00 ppb
2017-05-02OE508813ND
2017-05-02OE5088128.00 ppb
2017-05-02OE508814ND
2017-05-05OE5098449.00 ppb
2017-05-0517G0834-01ND
2017-08-01OE5453088.00 ppb
2017-08-01OE5453077.00 ppb
2017-08-01OE5453099.00 ppb
2017-08-01OE5453139.00 ppb
2017-08-01OE5453107.00 ppb
2017-08-01OE5453117.00 ppb
2017-08-01OE54530511.0 ppb
2017-08-01OE54530610.00 ppb
2017-11-01OE58548813.0 ppb
2017-11-01OE5854937.00 ppb
2017-11-01OE5854947.00 ppb
2017-11-01OE58548910.00 ppb
2017-11-01OE5854929.00 ppb
2017-11-01OE58548213.0 ppb
2017-11-01OE5854879.00 ppb
2017-11-01OE58549014.0 ppb
2017-11-01OE585491ND
2018-02-01OE6178359.00 ppb
2018-02-01OE6178389.00 ppb
2018-02-01OE6178399.00 ppb
2018-02-01OE61784012.0 ppb
2018-02-01OE61784112.0 ppb
2018-02-01OE61784214.0 ppb
2018-02-01OE61784810.00 ppb
2018-02-01OE61784910.00 ppb
2018-05-08OE65565410.00 ppb
2018-05-08OE65565711.0 ppb
2018-05-08OE65565812.0 ppb
2018-05-08OE6556598.00 ppb
2018-05-08OE65566212.0 ppb
2018-05-08OE65566325.0 ppb
2018-05-08OE65566411.0 ppb
2018-05-08OE65566510.00 ppb
2018-08-02OE69317113.0 ppb
2018-08-02OE69317214.0 ppb
2018-08-02OE69317415.0 ppb
2018-08-02OE69317521.0 ppb
2018-08-02OE69317612.0 ppb
2018-08-02OE6931778.00 ppb
2018-08-02OE6931788.00 ppb
2018-08-02OE69317910.00 ppb
2018-10-08OE724008ND
2018-11-01OE735004ND
2018-11-01OE73500712.0 ppb
2018-11-01OE73500811.0 ppb
2018-11-01OE7350097.00 ppb
2018-11-01OE7350128.00 ppb
2018-11-01OE73501312.0 ppb
2018-11-01OE7350147.00 ppb
2018-11-01OE735015ND
2019-02-05OE76800125.0 ppb
2019-02-05OE7680047.00 ppb
2019-02-05OE7680057.00 ppb
2019-02-05OE768006ND
2019-02-05OE7680096.00 ppb
2019-02-05OE7680108.00 ppb
2019-02-05OE768011ND
2019-02-05OE768012ND
2019-05-02OE803044ND
2019-05-02OE8030457.00 ppb
2019-05-02OE80304615.0 ppb
2019-05-02OE80304710.00 ppb
2019-05-02OE8030486.00 ppb
2019-05-02OE8030498.00 ppb
2019-05-02OE8030508.00 ppb
2019-05-02OE80305110.00 ppb
2019-08-01OE843995ND
2019-08-01OE843996ND
2019-08-06OE845758ND
2019-08-06OE845759ND
2019-08-07OE8463047.00 ppb
2019-08-07OE84630510.00 ppb
2019-08-07OE8463067.00 ppb
2019-08-07OE8463077.00 ppb
2019-11-05OE889231ND
2019-11-05OE889233ND
2019-11-05OE88923510.00 ppb
2019-11-05OE8892379.00 ppb
2019-11-05OE889239ND
2019-11-05OE8892418.00 ppb
2019-11-05OE88924311.0 ppb
2019-11-05OE889245ND