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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

SBDNO County Service Area 64

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

 

77

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND40ND
2015ND160ND
2016ND120ND
2017ND120ND
2018ND170ND
2019ND160ND

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
2014-10-013761-602-1330ND
2014-10-023761-604-1100ND
2014-10-023761-603-1130ND
2014-10-023761-601-1200ND
2015-01-053761-604-1320ND
2015-01-053761-603-1425ND
2015-01-063761-601-1030ND
2015-01-063761-602-1000ND
2015-04-023761-601-1130ND
2015-04-023761-604-1000ND
2015-04-023761-603-1100ND
2015-04-023761-602-1250ND
2015-07-023761-601-1115ND
2015-07-023761-604-0930ND
2015-07-023761-603-1100ND
2015-07-023761-602-1145ND
2015-10-053761-604-1230ND
2015-10-053761-603-1330ND
2015-10-063761-602-1325ND
2015-10-063761-601-1400ND
2016-01-043761-602-1010ND
2016-01-073761-603-0940ND
2016-01-073761-601-1010ND
2016-01-073761-604-0900ND
2016-04-053761-602-1330ND
2016-04-063761-603-1130ND
2016-04-063761-601-1155ND
2016-04-063761-604-1100ND
2016-10-033761-603-1130ND
2016-10-033761-601-1200ND
2016-10-033761-604-1100ND
2016-10-033761-602-1245ND
2017-01-033761-602-1320ND
2017-01-033761-601-1255ND
2017-01-033761-603-1215ND
2017-01-033761-604-1145ND
2017-07-053761-602-1315ND
2017-07-053761-603-1150ND
2017-07-053761-601-1220ND
2017-07-053761-604-1050ND
2017-10-023761-604-1130ND
2017-10-023761-603-1215ND
2017-10-023761-601-1245ND
2017-10-023761-602-1310ND
2018-01-033761-602-1245ND
2018-01-033761-601-1315ND
2018-01-033761-603-1115ND
2018-01-043761-604-1010ND
2018-04-023761-604-1130ND
2018-04-023761-602-1310ND
2018-04-053761-603-0930ND
2018-04-053761-601-0955ND
2018-07-023761-603-1240ND
2018-07-023761-604-1045ND
2018-07-023761-601-1215ND
2018-07-253761-604-1415ND
2018-10-024790-604-0945ND
2018-10-023761-604-0945ND
2018-10-023761-601-1050ND
2018-10-023761-602-1110ND
2018-10-023761-603-1030ND
2019-01-023761-602-1250ND
2019-01-023761-601-1230ND
2019-01-023761-604-1020ND
2019-01-023761-603-1130ND
2019-04-013761-603-1100ND
2019-04-013761-604-1030ND
2019-04-013761-601-1130ND
2019-04-013761-602-1200ND
2019-07-013761-603-1150ND
2019-07-013761-602-1255ND
2019-07-013761-604-1115ND
2019-07-013761-601-1230ND
2019-10-013761-603-1210ND
2019-10-013761-601-1230ND
2019-10-013761-604-1120ND
2019-10-013761-602-1250ND