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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Bay City

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

37

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0688 ppb161ND - 1.10 ppb
20150.863 ppb166ND - 4.20 ppb
20160.694 ppb169ND - 1.80 ppb
20170.781 ppb166ND - 4.50 ppb
20180.613 ppb167ND - 2.20 ppb
20190.988 ppb168ND - 3.70 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
2014-02-19AC43574ND
2014-02-19AC43573ND
2014-02-19AC43575ND
2014-02-19AC43572ND
2014-04-24AC51695ND
2014-04-24AC51694ND
2014-04-24AC51709ND
2014-04-24AC51696ND
2014-08-20AC64720ND
2014-08-20AC647231.10 ppb
2014-08-20AC64722ND
2014-08-20AC64719ND
2014-10-24AC70559ND
2014-10-24AC70600ND
2014-10-24AC70562ND
2014-10-24AC70563ND
2015-01-29AC78448ND
2015-01-29AC78445ND
2015-01-29AC78446ND
2015-01-29AC784701.000 ppb
2015-05-18AC923023.50 ppb
2015-05-18AC92280ND
2015-05-18AC92301ND
2015-05-18AC92299ND
2015-08-14AD04316ND
2015-08-14AD04245ND
2015-08-14AD04256ND
2015-08-14AD042911.70 ppb
2015-12-02AD151331.60 ppb
2015-12-02AD151371.80 ppb
2015-12-02AD15127ND
2015-12-02AD151244.20 ppb
2016-02-25AD25702ND
2016-02-25AD257001.000 ppb
2016-02-25AD25701ND
2016-02-25AD25703ND
2016-06-02AD391271.10 ppb
2016-06-02AD391261.30 ppb
2016-06-02AD39128ND
2016-06-02AD391251.10 ppb
2016-09-19AD49987ND
2016-09-19AD500081.000 ppb
2016-09-19AD49984ND
2016-09-19AD500041.10 ppb
2016-11-16AD582541.000 ppb
2016-11-16AD582551.80 ppb
2016-11-16AD582581.70 ppb
2016-11-16AD58257ND
2017-01-25AD66779ND
2017-01-25AD667671.000 ppb
2017-01-25AD66766ND
2017-01-25AD66781ND
2017-05-23AD85214ND
2017-05-23AD852111.60 ppb
2017-05-23AD85212ND
2017-05-23AD85215ND
2017-08-08AD92375ND
2017-08-08AD92379ND
2017-08-08AD923771.70 ppb
2017-08-08AD92378ND
2017-10-23AE015822.40 ppb
2017-10-23AE015844.50 ppb
2017-10-23AE015831.30 ppb
2017-10-23AE01581ND
2018-01-09AE08328ND
2018-01-09AE083181.10 ppb
2018-01-09AE08309ND
2018-01-09AE08326ND
2018-04-05AE21427ND
2018-04-05AE21425ND
2018-04-05AE214211.10 ppb
2018-04-05AE214201.30 ppb
2018-07-18AE33748ND
2018-07-18AE337261.10 ppb
2018-07-18AE33755ND
2018-07-18AE33727ND
2018-10-09AE429222.00 ppb
2018-10-09AE429212.20 ppb
2018-10-09AE42920ND
2018-10-09AE429191.000 ppb
2019-02-07AE53410ND
2019-02-07AE53411ND
2019-02-07AE534133.70 ppb
2019-02-07AE534091.40 ppb
2019-04-29AE639341.80 ppb
2019-04-29AE639353.00 ppb
2019-04-29AE639131.30 ppb
2019-04-29AE63918ND
2019-08-06AE77215ND
2019-08-06AE771862.10 ppb
2019-08-06AE77213ND
2019-08-06AE771851.10 ppb
2019-10-17AE86901ND
2019-10-17AE86900ND
2019-10-17AE868941.40 ppb
2019-10-17AE86917ND