Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

Sedalia

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

 

40

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20149.51 ppb167ND - 25.5 ppb
2015ND100ND
2016ND80ND
2017ND20ND
2018ND20ND
20196.20 ppb21ND - 12.4 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
2014-02-10AC18168ND
2014-02-10AC1816724.7 ppb
2014-02-10AC1817017.7 ppb
2014-02-10AC1816916.7 ppb
2014-05-12AC2317524.4 ppb
2014-05-12AC2317617.9 ppb
2014-05-12AC2317725.2 ppb
2014-05-12AC2317825.5 ppb
2014-08-20AC33249ND
2014-08-20AC33250ND
2014-08-20AC33251ND
2014-08-20AC33252ND
2014-11-04AC38221ND
2014-11-04AC38224ND
2014-11-04AC38223ND
2014-11-04AC38222ND
2015-02-09AC41949ND
2015-02-09AC41951ND
2015-02-09AC41950ND
2015-02-13AC43142ND
2015-05-11AC46524ND
2015-05-11AC46525ND
2015-08-19AC58762ND
2015-08-19AC58763ND
2015-11-25AC62791ND
2015-11-25AC62790ND
2016-02-26AC66335ND
2016-02-26AC66334ND
2016-05-25AC72028ND
2016-05-25AC72027ND
2016-08-23AC81631ND
2016-08-23AC81630ND
2016-11-16AC86926ND
2016-11-16AC86927ND
2017-08-21AD03370ND
2017-08-21AD03371ND
2018-08-20AD31173ND
2018-08-20AD31174ND
2019-08-27AD5390012.4 ppb
2019-08-27AD53901ND