Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

Iowa City Water Department

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.

 

184

Samples

0

Samples exceeding legal limit (MCL)

148

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201411.7 ppb32329.00 ppb - 17.0 ppb
20158.79 ppb24247.00 ppb - 12.0 ppb
20165.78 ppb3220ND - 12.0 ppb
20177.97 ppb3229ND - 11.0 ppb
201812.9 ppb32326.00 ppb - 23.0 ppb
20192.19 ppb3211ND - 8.00 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
2014-02-24203524013.0 ppb
2014-02-24203524212.0 ppb
2014-02-24203524310.00 ppb
2014-02-24203524410.00 ppb
2014-02-24203524511.0 ppb
2014-02-24203524612.0 ppb
2014-02-24203524711.0 ppb
2014-02-24203524811.0 ppb
2014-05-07205133312.0 ppb
2014-05-07205133414.0 ppb
2014-05-07205133510.00 ppb
2014-05-07205133616.0 ppb
2014-05-07205133716.0 ppb
2014-05-07205133817.0 ppb
2014-05-07205133914.0 ppb
2014-05-07205134017.0 ppb
2014-08-26207747711.0 ppb
2014-08-26207747810.00 ppb
2014-08-26207748012.0 ppb
2014-08-2620774829.00 ppb
2014-08-2620774839.00 ppb
2014-08-26207748410.00 ppb
2014-08-26207748511.0 ppb
2014-08-26207748611.0 ppb
2014-11-2120935039.00 ppb
2014-11-2120935049.00 ppb
2014-11-2120935059.00 ppb
2014-11-21209350611.0 ppb
2014-11-21209350716.0 ppb
2014-11-21209350810.00 ppb
2014-11-21209350911.0 ppb
2014-11-2120935109.00 ppb
2015-02-10OE2134967.00 ppb
2015-05-12OE2418267.00 ppb
2015-05-12OE2418299.00 ppb
2015-05-12OE2418279.00 ppb
2015-05-12OE2418289.00 ppb
2015-05-12OE2418307.00 ppb
2015-05-12OE2418238.00 ppb
2015-05-12OE2418249.00 ppb
2015-05-12OE2418259.00 ppb
2015-08-18OE28198511.0 ppb
2015-08-18OE28198811.0 ppb
2015-08-18OE2819848.00 ppb
2015-08-18OE2819868.00 ppb
2015-08-18OE28199010.00 ppb
2015-08-18OE2819899.00 ppb
2015-08-18OE28198712.0 ppb
2015-08-18OE28199111.0 ppb
2015-11-04OE3139859.00 ppb
2015-11-04OE3139878.00 ppb
2015-11-04OE3139869.00 ppb
2015-11-04OE3139889.00 ppb
2015-11-04OE3139907.00 ppb
2015-11-04OE3139917.00 ppb
2015-11-04OE3139848.00 ppb
2016-02-05OE3421787.00 ppb
2016-02-05OE3421817.00 ppb
2016-02-05OE342182ND
2016-02-05OE3421797.00 ppb
2016-02-05OE3421838.00 ppb
2016-02-05OE342184ND
2016-02-05OE342185ND
2016-02-05OE342180ND
2016-05-13OE377560ND
2016-05-13OE377562ND
2016-05-13OE377561ND
2016-05-13OE377563ND
2016-05-13OE377564ND
2016-05-13OE377566ND
2016-05-13OE377567ND
2016-05-13OE377565ND
2016-08-09OE41253910.00 ppb
2016-08-09OE4125389.00 ppb
2016-08-09OE41254210.00 ppb
2016-08-09OE41254011.0 ppb
2016-08-09OE41254111.0 ppb
2016-08-09OE4125459.00 ppb
2016-08-09OE41254410.00 ppb
2016-08-09OE4125439.00 ppb
2016-11-09OE45036412.0 ppb
2016-11-09OE4503588.00 ppb
2016-11-09OE4503577.00 ppb
2016-11-09OE45036110.00 ppb
2016-11-09OE45036010.00 ppb
2016-11-09OE4503599.00 ppb
2016-11-09OE4503639.00 ppb
2016-11-09OE45036212.0 ppb
2017-02-15OE48120710.00 ppb
2017-02-15OE4812089.00 ppb
2017-02-15OE48120910.00 ppb
2017-02-15OE48121010.00 ppb
2017-02-15OE48121210.00 ppb
2017-02-15OE4812148.00 ppb
2017-02-15OE4812136.00 ppb
2017-02-15OE4812119.00 ppb
2017-05-10OE511470ND
2017-05-10OE5114717.00 ppb
2017-05-10OE511472ND
2017-05-10OE5114757.00 ppb
2017-05-10OE5114738.00 ppb
2017-05-10OE5114749.00 ppb
2017-05-10OE5114767.00 ppb
2017-05-10OE511477ND
2017-08-08OE5480497.00 ppb
2017-08-08OE5480479.00 ppb
2017-08-08OE5480468.00 ppb
2017-08-08OE54804410.00 ppb
2017-08-08OE5480459.00 ppb
2017-08-08OE54804311.0 ppb
2017-08-08OE5480489.00 ppb
2017-08-08OE5480427.00 ppb
2017-11-14OE5900009.00 ppb
2017-11-14OE5900028.00 ppb
2017-11-14OE59000110.00 ppb
2017-11-14OE5900049.00 ppb
2017-11-14OE5900039.00 ppb
2017-11-14OE58999710.00 ppb
2017-11-14OE58999910.00 ppb
2017-11-14OE58999810.00 ppb
2018-02-20OE62471021.0 ppb
2018-02-20OE62471122.0 ppb
2018-02-20OE62471223.0 ppb
2018-02-20OE62471322.0 ppb
2018-02-20OE62471420.0 ppb
2018-02-20OE62471523.0 ppb
2018-02-20OE62471616.0 ppb
2018-02-20OE62471722.0 ppb
2018-05-22OE66071911.0 ppb
2018-05-22OE66072011.0 ppb
2018-05-22OE6607219.00 ppb
2018-05-22OE66072212.0 ppb
2018-05-22OE6607238.00 ppb
2018-05-22OE66072410.00 ppb
2018-05-22OE6607258.00 ppb
2018-05-22OE6607269.00 ppb
2018-08-13OE6976007.00 ppb
2018-08-13OE69760111.0 ppb
2018-08-13OE69760213.0 ppb
2018-08-13OE69760311.0 ppb
2018-08-13OE6976049.00 ppb
2018-08-13OE69760512.0 ppb
2018-08-13OE69760612.0 ppb
2018-08-13OE69760711.0 ppb
2018-11-06OE73623111.0 ppb
2018-11-06OE73623210.00 ppb
2018-11-06OE73623310.00 ppb
2018-11-06OE73623412.0 ppb
2018-11-06OE73623510.00 ppb
2018-11-06OE73623611.0 ppb
2018-11-06OE7362376.00 ppb
2018-11-06OE73623810.00 ppb
2019-02-06OE767811ND
2019-02-06OE767812ND
2019-02-06OE767813ND
2019-02-06OE767814ND
2019-02-06OE767815ND
2019-02-06OE767816ND
2019-02-06OE767817ND
2019-02-06OE767818ND
2019-05-14OE807426ND
2019-05-14OE807427ND
2019-05-14OE807428ND
2019-05-14OE807429ND
2019-05-14OE807430ND
2019-05-14OE807431ND
2019-05-14OE807432ND
2019-05-14OE807433ND
2019-08-06OE8451568.00 ppb
2019-08-06OE8451577.00 ppb
2019-08-06OE8451586.00 ppb
2019-08-06OE8451597.00 ppb
2019-08-06OE8451606.00 ppb
2019-08-06OE8451616.00 ppb
2019-08-06OE845162ND
2019-08-06OE8451636.00 ppb
2019-11-12OE892492ND
2019-11-12OE8924936.00 ppb
2019-11-12OE892494ND
2019-11-12OE8924956.00 ppb
2019-11-12OE892496ND
2019-11-12OE892497ND
2019-11-12OE8924986.00 ppb
2019-11-12OE8924996.00 ppb