Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Meridian 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.

 

155

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.430 ppb234ND - 3.10 ppb
20190.123 ppb303ND - 1.40 ppb
2020ND240ND
20210.0833 ppb241ND - 2.00 ppb
20220.398 ppb303ND - 4.53 ppb
20230.104 ppb241ND - 2.50 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-03-06D201803090744ND
2018-03-06D201803090747ND
2018-03-06D201803090746ND
2018-03-06D201803090745ND
2018-05-23D201805240688ND
2018-05-23D201805240689ND
2018-05-23D201805240690ND
2018-05-23D201805240687ND
2018-07-09D201807111080ND
2018-07-09D201807111081ND
2018-07-09D201807111082ND
2018-07-09D201807111079ND
2018-07-09D2018071110782.00 ppb
2018-07-09D201807111077ND
2018-07-09D201807111076ND
2018-07-09D201807111074ND
2018-07-09D201807111075ND
2018-11-26D201811270533ND
2018-11-26D2018112705323.10 ppb
2018-11-26D2018112705312.20 ppb
2018-11-26D201811270530ND
2018-11-26D2018112705292.60 ppb
2018-11-26D201811270528ND
2019-01-29D201902010362ND
2019-01-29D201902010361ND
2019-01-29D201902010360ND
2019-01-29D201902010365ND
2019-01-29D201902010364ND
2019-01-29D201902010363ND
2019-06-18D201906200380ND
2019-06-18D201906200381ND
2019-06-18D2019062003821.40 ppb
2019-06-18D2019062003831.30 ppb
2019-06-18D201906200384ND
2019-06-18D2019062003791.000 ppb
2019-06-18201906200379ND
2019-06-18201906200380ND
2019-06-18201906200381ND
2019-06-18201906200382ND
2019-06-18201906200383ND
2019-06-18201906200384ND
2019-09-24201909250359ND
2019-09-24201909250360ND
2019-09-24201909250361ND
2019-09-24201909250362ND
2019-09-24201909250363ND
2019-09-24201909250364ND
2019-11-12201911130448ND
2019-11-12201911130449ND
2019-11-12201911130450ND
2019-11-12201911130451ND
2019-11-12201911130452ND
2019-11-12201911130453ND
2020-03-03202003040692ND
2020-03-03202003040693ND
2020-03-03202003040694ND
2020-03-03202003040695ND
2020-03-03202003040696ND
2020-03-03202003040697ND
2020-04-21202004220893ND
2020-04-21202004220894ND
2020-04-21202004220895ND
2020-04-21202004220896ND
2020-04-21202004220897ND
2020-04-21202004220898ND
2020-07-13202007140425ND
2020-07-13202007140426ND
2020-07-13202007140427ND
2020-07-13202007140428ND
2020-07-13202007140429ND
2020-07-13202007140430ND
2020-11-12202011130876ND
2020-11-12202011130877ND
2020-11-12202011130878ND
2020-11-12202011130879ND
2020-11-12202011130880ND
2020-11-12202011130881ND
2021-01-27202101280244ND
2021-01-27202101280249ND
2021-01-27202101280247ND
2021-01-27202101280246ND
2021-01-27202101280248ND
2021-01-27202101280245ND
2021-04-28202104290425ND
2021-04-28202104290423ND
2021-04-28202104290421ND
2021-04-282021042904222.00 ppb
2021-04-28202104290424ND
2021-04-28202104290420ND
2021-07-28202107290502ND
2021-07-28202107290506ND
2021-07-28202107290501ND
2021-07-28202107290505ND
2021-07-28202107290503ND
2021-07-28202107290504ND
2021-10-27202110281063ND
2021-10-27202110281058ND
2021-10-27202110281060ND
2021-10-27202110281061ND
2021-10-27202110281059ND
2021-10-27202110281062ND
2022-02-16202202180560ND
2022-02-16202202180561ND
2022-02-16202202180562ND
2022-02-16202202180563ND
2022-02-16202202180564ND
2022-02-16202202180565ND
2022-06-30380-7833-1ND
2022-06-30380-7833-2ND
2022-06-30380-7833-3ND
2022-06-30380-7833-4ND
2022-06-30380-7833-5ND
2022-06-30380-7833-6ND
2022-09-20380-21524-1ND
2022-09-20380-21524-2ND
2022-09-20380-21524-3ND
2022-09-20380-21524-4ND
2022-09-20380-21524-5ND
2022-09-20380-21524-6ND
2022-09-20D2246797ND
2022-09-20D22467964.13 ppb
2022-09-20D22467954.53 ppb
2022-09-20D22467943.27 ppb
2022-09-20D2246793ND
2022-09-20D2246792ND
2022-11-15380-28459-1ND
2022-11-15380-28459-2ND
2022-11-15380-28459-3ND
2022-11-15380-28459-4ND
2022-11-15380-28459-5ND
2022-11-15380-28459-6ND
2023-01-24380-35453-1ND
2023-01-24380-35453-2ND
2023-01-24380-35453-3ND
2023-01-24380-35453-4ND
2023-01-24380-35453-5ND
2023-01-24380-35453-6ND
2023-06-05380-49949-1ND
2023-06-05380-49949-2ND
2023-06-05380-49949-3ND
2023-06-05380-49949-42.50 ppb
2023-06-05380-49949-5ND
2023-06-05380-49949-6ND
2023-09-05380-61807-1ND
2023-09-05380-61807-2ND
2023-09-05380-61807-3ND
2023-09-05380-61807-4ND
2023-09-05380-61807-5ND
2023-09-05380-61807-6ND
2023-10-04380-65926-1ND
2023-10-04380-65926-2ND
2023-10-04380-65926-3ND
2023-10-04380-65926-4ND
2023-10-04380-65926-5ND
2023-10-04380-65926-6ND