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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

Newhall CWD-Newhall

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.

 

88

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20124.71 ppb884.10 ppb - 5.90 ppb
20130.188 ppb161ND - 3.00 ppb
20140.300 ppb162ND - 2.80 ppb
2015ND160ND
2016ND160ND
20174.83 ppb168ND - 13.0 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
2012-07-129590-802-11304.10 ppb
2012-07-129590-800-12055.00 ppb
2012-07-129590-801-11005.10 ppb
2012-07-129590-803-12204.60 ppb
2012-10-119590-801-10285.90 ppb
2012-10-119590-803-09354.50 ppb
2012-10-119590-800-09484.20 ppb
2012-10-119590-802-10094.30 ppb
2013-01-109590-801-1035ND
2013-01-109590-803-1220ND
2013-01-109590-800-1155ND
2013-01-109590-802-1110ND
2013-04-119590-800-10503.00 ppb
2013-04-119590-803-1015ND
2013-04-119590-801-1120ND
2013-04-119590-802-0944ND
2013-07-119590-800-1035ND
2013-07-119590-801-0850ND
2013-07-119590-803-1020ND
2013-07-119590-802-0830ND
2013-10-109590-802-1400ND
2013-10-109590-800-1300ND
2013-10-109590-803-1330ND
2013-10-109590-801-1230ND
2014-01-169590-802-09302.80 ppb
2014-01-169590-800-1155ND
2014-01-169590-803-11302.00 ppb
2014-01-169590-801-0900ND
2014-04-109590-803-1042ND
2014-04-109590-800-1054ND
2014-04-109590-801-0851ND
2014-04-109590-802-1007ND
2014-07-179590-803-1055ND
2014-07-179590-801-0945ND
2014-07-179590-800-1125ND
2014-07-179590-802-1020ND
2014-10-169590-803-1345ND
2014-10-169590-800-1405ND
2014-10-169590-802-1305ND
2014-10-169590-801-1450ND
2015-01-159590-800-1140ND
2015-01-159590-803-1130ND
2015-01-159590-802-1100ND
2015-01-159590-801-1040ND
2015-04-239590-800-1425ND
2015-04-239590-801-1145ND
2015-04-239590-802-1310ND
2015-04-239590-803-1400ND
2015-07-169590-800-1320ND
2015-07-169590-801-1055ND
2015-07-169590-802-1120ND
2015-07-169590-803-1335ND
2015-10-159590-803-0845ND
2015-10-159590-800-0855ND
2015-10-159590-801-0820ND
2015-10-159590-802-0800ND
2016-01-149590-802-1035ND
2016-01-149590-803-1100ND
2016-01-149590-801-0920ND
2016-01-149590-800-1130ND
2016-04-079590-802-1145ND
2016-04-079590-800-1025ND
2016-04-079590-803-1050ND
2016-04-079590-801-1120ND
2016-07-219590-800-1338ND
2016-07-219590-802-0945ND
2016-07-219590-803-1325ND
2016-07-219590-801-0923ND
2016-10-069590-802-1015ND
2016-10-069590-803-0948ND
2016-10-069590-800-0915ND
2016-10-069590-801-0840ND
2017-01-199590-801-0850ND
2017-01-199590-800-1000ND
2017-01-199590-803-0935ND
2017-01-199590-802-08256.30 ppb
2017-04-139590-801-1100ND
2017-04-139590-800-1430ND
2017-04-139590-802-1120ND
2017-04-139590-803-1420ND
2017-07-139590-801-09355.70 ppb
2017-07-139590-803-10258.70 ppb
2017-07-139590-800-10458.60 ppb
2017-07-139590-802-0905ND
2017-10-199590-803-130613.0 ppb
2017-10-199590-800-124013.0 ppb
2017-10-199590-801-110511.0 ppb
2017-10-199590-802-114511.0 ppb