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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Lees Summit

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.

 

100

Samples

0

Samples exceeding legal limit (MCL)

60

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20149.22 ppb208ND - 34.8 ppb
201510.8 ppb1610ND - 33.6 ppb
201613.1 ppb1610ND - 28.3 ppb
20178.50 ppb159ND - 22.3 ppb
20189.81 ppb1710ND - 23.6 ppb
201913.3 ppb1613ND - 27.5 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
2014-03-12AC1986519.0 ppb
2014-03-12AC19866ND
2014-03-12AC19867ND
2014-03-12AC19868ND
2014-06-11AC2850934.8 ppb
2014-06-11AC2851030.2 ppb
2014-06-11AC28511ND
2014-06-11AC28512ND
2014-06-11AC28513ND
2014-06-11AC28514ND
2014-06-11AC2851514.0 ppb
2014-06-11AC28516ND
2014-09-12AC3557120.1 ppb
2014-09-12AC3557021.2 ppb
2014-09-12AC3557220.9 ppb
2014-09-12AC3556924.1 ppb
2014-12-15AC39467ND
2014-12-15AC39464ND
2014-12-15AC39465ND
2014-12-15AC39466ND
2015-03-12AC4354411.1 ppb
2015-03-12AC43545ND
2015-03-12AC43546ND
2015-03-12AC43547ND
2015-06-17AC5116313.8 ppb
2015-06-17AC5116414.5 ppb
2015-06-17AC5116133.6 ppb
2015-06-17AC5116216.0 ppb
2015-09-15AC5948115.8 ppb
2015-09-15AC5947820.7 ppb
2015-09-15AC5947917.2 ppb
2015-09-15AC5948013.3 ppb
2015-12-10AC6391116.1 ppb
2015-12-10AC63912ND
2015-12-10AC63913ND
2015-12-10AC63914ND
2016-03-08AC67612ND
2016-03-08AC6761015.8 ppb
2016-03-08AC67611ND
2016-03-08AC67613ND
2016-06-09AC7481622.1 ppb
2016-06-09AC7481725.1 ppb
2016-06-09AC7481519.4 ppb
2016-06-10AC7481428.3 ppb
2016-09-06AC8375520.0 ppb
2016-09-07AC8375822.3 ppb
2016-09-07AC8375621.7 ppb
2016-09-07AC8375719.5 ppb
2016-12-08AC8841614.9 ppb
2016-12-08AC88418ND
2016-12-08AC88417ND
2016-12-08AC88419ND
2017-03-13AC92109ND
2017-03-13AC9210722.3 ppb
2017-03-13AC92110ND
2017-03-13AC92108ND
2017-06-07AC9840514.2 ppb
2017-06-07AC9840413.5 ppb
2017-06-07AC9840312.9 ppb
2017-06-07AC9840612.6 ppb
2017-09-11AD0640613.1 ppb
2017-09-11AD0640514.2 ppb
2017-09-11AD0640712.0 ppb
2017-09-11AD0640412.7 ppb
2017-12-12AD10577ND
2017-12-12AD10576ND
2017-12-12AD10575ND
2018-01-19AD12426ND
2018-03-09AD16454ND
2018-03-09AD16453ND
2018-03-09AD1645218.5 ppb
2018-03-09AD16455ND
2018-06-07AD2722915.1 ppb
2018-06-07AD2723118.1 ppb
2018-06-07AD2723216.9 ppb
2018-06-07AD2723013.3 ppb
2018-09-10AD3288115.0 ppb
2018-09-10AD3288023.6 ppb
2018-09-10AD3288217.2 ppb
2018-09-10AD3288315.8 ppb
2018-12-12AD3674813.3 ppb
2018-12-12AD36749ND
2018-12-12AD36750ND
2018-12-12AD36751ND
2019-03-12AD4047912.5 ppb
2019-03-12AD40482ND
2019-03-12AD40481ND
2019-03-12AD40480ND
2019-06-10AD4903427.5 ppb
2019-06-10AD4903525.1 ppb
2019-06-10AD4903624.1 ppb
2019-06-10AD4903718.2 ppb
2019-09-11AD5514117.3 ppb
2019-09-11AD5514213.6 ppb
2019-09-11AD5514318.6 ppb
2019-09-11AD5514418.2 ppb
2019-12-03AD5906011.4 ppb
2019-12-03AD5906113.0 ppb
2019-12-03AD5906211.3 ppb
2019-12-26AD599611.60 ppb