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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Smyrna 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.

MORE ABOUT THIS CONTAMINANT

 

88

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.13 ppb87ND - 4.03 ppb
20151.84 ppb1611ND - 5.07 ppb
20160.963 ppb166ND - 4.00 ppb
20170.726 ppb168ND - 2.58 ppb
20181.65 ppb169ND - 7.12 ppb
20191.19 ppb168ND - 5.87 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
2014-08-27L5231031-92.55 ppb
2014-08-27L5231031-15ND
2014-08-27L5231031-144.03 ppb
2014-08-27L5231031-103.20 ppb
2014-12-04S6033861.75 ppb
2014-12-04351667900042.40 ppb
2014-12-04351667900030.630 ppb
2014-12-04351667900022.50 ppb
2015-03-31L5526188-2ND
2015-03-31L5526188-1ND
2015-03-31L5526188-3ND
2015-03-31S6199491.08 ppb
2015-06-30S6326661.21 ppb
2015-06-30L5676935-82.78 ppb
2015-06-30L5676935-75.07 ppb
2015-09-30L5855211-4 HAA51.92 ppb
2015-09-30L5855211-3 HAA5ND
2015-09-30L5855211-2 HAA51.21 ppb
2015-09-30L5855211-1 HAA52.03 ppb
2015-12-21L5976007-44.28 ppb
2015-12-21L5976007-13.10 ppb
2015-12-21L5976007-23.73 ppb
2015-12-21L5976007-53.09 ppb
2015-12-21S659609ND
2016-03-31L6169969-44.00 ppb
2016-03-31L6169969-3ND
2016-03-31L6169969-21.20 ppb
2016-03-31L6169969-1ND
2016-06-29L6343273-4 HAA5ND
2016-06-29L6343273-3 HAA5ND
2016-06-29L6343273-2 HAA5ND
2016-06-29L6343273-1 HAA5ND
2016-09-29L6498471-43.80 ppb
2016-09-29L6498471-1ND
2016-09-29L6498471-21.000 ppb
2016-09-29L6498471-3ND
2016-12-1421965720042.90 ppb
2016-12-142196572003ND
2016-12-142196572002ND
2016-12-1421965720012.50 ppb
2017-03-3022192010011.000 ppb
2017-03-30S733772ND
2017-03-3022192010041.50 ppb
2017-03-3022192010021.10 ppb
2017-06-282242957004ND
2017-06-282242957003ND
2017-06-2822429570021.10 ppb
2017-06-282242957001ND
2017-12-19S7820931.29 ppb
2017-12-19S7820922.58 ppb
2017-12-19S782095ND
2017-12-19S782096ND
2017-12-19S782098ND
2017-12-19S782099ND
2017-12-19S7821011.000 ppb
2017-12-19S7821022.05 ppb
2018-03-2610515852.65 ppb
2018-03-2610515811.06 ppb
2018-03-2610515771.12 ppb
2018-03-2610515731.02 ppb
2018-06-26S808464ND
2018-06-26S808462ND
2018-06-26S8084604.99 ppb
2018-06-26S8084587.12 ppb
2018-09-26S808654ND
2018-09-26S808649ND
2018-09-26S8086522.51 ppb
2018-09-26S8086564.76 ppb
2018-12-17S8548451.15 ppb
2018-12-17S854843ND
2018-12-17S854841ND
2018-12-17S854839ND
2019-03-28S866477ND
2019-03-28S8664732.51 ppb
2019-03-28S866471ND
2019-03-28S8664691.37 ppb
2019-06-27S8931731.09 ppb
2019-06-27S8931675.87 ppb
2019-06-27S8931692.88 ppb
2019-06-27S893171ND
2019-09-30S909277ND
2019-10-31S9252022.64 ppb
2019-10-31S925200ND
2019-10-31S925198ND
2019-12-09S9275301.44 ppb
2019-12-09S927659ND
2019-12-09S927652ND
2019-12-09S9275341.32 ppb