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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Fleming County Water Association

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)

78

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.36 ppb1614ND - 3.00 ppb
20155.53 ppb16160.700 ppb - 9.00 ppb
20166.68 ppb16160.800 ppb - 24.8 ppb
20173.06 ppb1615ND - 6.50 ppb
20181.98 ppb169ND - 6.40 ppb
20192.63 ppb168ND - 9.30 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
2014-02-172014022850020.600 ppb
2014-02-17201402285001ND
2014-02-17201402285004ND
2014-02-172014022850031.60 ppb
2014-05-192014070380012.40 ppb
2014-05-192014070380023.00 ppb
2014-05-192014070380033.00 ppb
2014-05-192014070380041.30 ppb
2014-08-182014117130011.30 ppb
2014-08-182014117130021.60 ppb
2014-08-182014117130032.50 ppb
2014-08-182014117130041.60 ppb
2014-11-172014161920020.700 ppb
2014-11-172014161920040.500 ppb
2014-11-172014161920030.900 ppb
2014-11-172014161920010.700 ppb
2015-02-162015019240039.00 ppb
2015-02-162015019240028.90 ppb
2015-02-162015019240017.90 ppb
2015-02-162015019240047.50 ppb
2015-05-182015059860022.60 ppb
2015-05-182015059860034.20 ppb
2015-05-182015059860010.700 ppb
2015-05-182015059860042.60 ppb
2015-08-172015099620040.800 ppb
2015-08-172015099620037.10 ppb
2015-08-172015099620022.30 ppb
2015-08-172015099620011.30 ppb
2015-11-162015142580018.00 ppb
2015-11-162015142580047.80 ppb
2015-11-162015142580039.00 ppb
2015-11-162015142580028.80 ppb
2016-02-1520160209400224.8 ppb
2016-02-1520160209400422.5 ppb
2016-02-1520160209400118.7 ppb
2016-02-1520160209400312.3 ppb
2016-05-162016069510041.90 ppb
2016-05-162016069510013.50 ppb
2016-05-162016069510022.80 ppb
2016-05-162016069510033.60 ppb
2016-08-152016118200034.60 ppb
2016-08-152016118200040.900 ppb
2016-08-152016118200010.800 ppb
2016-08-152016118200022.10 ppb
2016-11-142016163150021.30 ppb
2016-11-142016163150033.40 ppb
2016-11-142016163150041.50 ppb
2016-11-142016163150012.20 ppb
2017-02-212017025940043.40 ppb
2017-02-212017025940013.50 ppb
2017-02-212017025940024.50 ppb
2017-02-212017025940034.80 ppb
2017-05-152017070670011.80 ppb
2017-05-152017070670022.60 ppb
2017-05-152017070670032.10 ppb
2017-05-152017070670041.90 ppb
2017-08-212017120550016.10 ppb
2017-08-212017120550025.40 ppb
2017-08-212017120550043.80 ppb
2017-08-212017120550036.50 ppb
2017-11-202017162740040.500 ppb
2017-11-202017162740031.20 ppb
2017-11-202017162740010.800 ppb
2017-11-20201716274002ND
2018-02-19201801784004ND
2018-02-19201801784003ND
2018-02-19201801784002ND
2018-02-19201801784001ND
2018-05-21201806130004ND
2018-05-212018061300012.90 ppb
2018-05-212018061300023.80 ppb
2018-05-21201806130003ND
2018-08-202018100370042.30 ppb
2018-08-202018100370032.80 ppb
2018-08-202018100370026.40 ppb
2018-08-202018100370012.20 ppb
2018-11-19201814018001ND
2018-11-192018140180022.30 ppb
2018-11-192018140180034.70 ppb
2018-11-192018140180044.30 ppb
2019-02-19201902182001ND
2019-02-19201902182002ND
2019-02-19201902182003ND
2019-02-19201902182004ND
2019-05-20201906891001ND
2019-05-202019068910042.40 ppb
2019-05-202019068910032.90 ppb
2019-05-202019068910022.80 ppb
2019-08-192019113250024.30 ppb
2019-08-19201911325004ND
2019-08-19201911325003ND
2019-08-19201911325001ND
2019-11-182019155760046.70 ppb
2019-11-182019155760037.10 ppb
2019-11-182019155760029.30 ppb
2019-11-182019155760016.50 ppb