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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

SBNDO County Service Area 70J

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.

 

47

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
20150.219 ppb162ND - 2.10 ppb
20160.131 ppb162ND - 1.10 ppb
20170.0867 ppb151ND - 1.30 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 on-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
2015-01-123761-603-1140ND
2015-01-123761-604-1105ND
2015-01-123761-601-12302.10 ppb
2015-01-123761-602-1030ND
2015-04-083761-601-10301.40 ppb
2015-04-083761-603-1135ND
2015-04-083761-604-1345ND
2015-04-083761-602-1305ND
2015-07-093761-601-1130ND
2015-07-093761-603-1220ND
2015-07-093761-604-1300ND
2015-07-093761-602-1335ND
2015-10-133761-602-1135ND
2015-10-133761-603-1015ND
2015-10-133761-604-1220ND
2015-10-133761-601-1100ND
2016-01-113761-602-1215ND
2016-01-113761-604-1130ND
2016-01-113761-601-09501.10 ppb
2016-01-113761-603-1045ND
2016-04-113761-602-1150ND
2016-04-113761-601-1220ND
2016-04-133761-604-0950ND
2016-04-133761-603-0930ND
2016-07-143761-602-1200ND
2016-07-143761-604-1330ND
2016-07-143761-603-1300ND
2016-07-143761-601-1130ND
2016-10-113761-604-1325ND
2016-10-113761-603-1245ND
2016-10-113761-602-1120ND
2016-10-113761-601-10501.000 ppb
2017-01-103761-603-1240ND
2017-01-103761-604-1320ND
2017-01-103761-602-1130ND
2017-01-103761-601-11001.30 ppb
2017-04-113761-604-1300ND
2017-04-113761-603-1230ND
2017-04-113761-602-1140ND
2017-04-113761-601-1020ND
2017-07-103761-602-1115ND
2017-07-103761-603-1230ND
2017-07-103761-601-1030ND
2017-10-113761-604-1145ND
2017-10-113761-603-1215ND
2017-10-113761-602-1320ND
2017-10-113761-601-1400ND