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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Paramount 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

 

184

Samples

0

Samples exceeding legal limit (MCL)

82

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20143.40 ppb3225ND - 13.2 ppb
20150.388 ppb328ND - 2.57 ppb
20163.16 ppb3215ND - 11.8 ppb
20171.23 ppb3214ND - 6.97 ppb
20180.499 ppb3212ND - 2.79 ppb
20191.03 ppb248ND - 4.40 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
2014-01-079469-800-07573.57 ppb
2014-01-079469-801-08111.79 ppb
2014-01-079469-802-10261.80 ppb
2014-01-079469-803-08231.96 ppb
2014-01-079469-804-084111.2 ppb
2014-01-079469-805-085613.2 ppb
2014-01-079469-806-100910.2 ppb
2014-01-079469-807-10353.71 ppb
2014-04-019469-800-0814ND
2014-04-019469-801-0821ND
2014-04-019469-802-1045ND
2014-04-019469-803-0832ND
2014-04-019469-804-08501.03 ppb
2014-04-019469-805-1005ND
2014-04-019469-806-1015ND
2014-04-019469-807-1035ND
2014-07-019469-800-07453.62 ppb
2014-07-019469-801-07562.98 ppb
2014-07-019469-802-08123.58 ppb
2014-07-019469-803-08233.32 ppb
2014-07-019469-804-08505.56 ppb
2014-07-019469-805-08334.02 ppb
2014-07-019469-806-08403.00 ppb
2014-07-019469-807-08042.40 ppb
2014-10-079469-800-10013.52 ppb
2014-10-079469-801-10333.53 ppb
2014-10-079469-802-10414.68 ppb
2014-10-079469-803-10523.90 ppb
2014-10-079469-804-12364.01 ppb
2014-10-079469-805-12463.87 ppb
2014-10-079469-806-10113.87 ppb
2014-10-079469-807-10464.34 ppb
2015-01-069469-800-0952ND
2015-01-069469-801-1008ND
2015-01-069469-802-10201.34 ppb
2015-01-069469-803-1043ND
2015-01-069469-804-11161.30 ppb
2015-01-069469-805-11012.55 ppb
2015-01-069469-806-10502.57 ppb
2015-01-069469-807-1031ND
2015-04-219469-800-07401.21 ppb
2015-04-219469-801-0750ND
2015-04-219469-802-0758ND
2015-04-219469-803-08091.07 ppb
2015-04-219469-804-08581.32 ppb
2015-04-219469-805-08441.06 ppb
2015-04-219469-806-0835ND
2015-04-219469-807-0822ND
2015-07-289469-800-0750ND
2015-07-289469-801-0756ND
2015-07-289469-802-0815ND
2015-07-289469-803-0828ND
2015-07-289469-804-0856ND
2015-07-289469-805-1020ND
2015-07-289469-806-1032ND
2015-07-289469-807-0841ND
2015-10-209469-800-1033ND
2015-10-209469-801-1041ND
2015-10-209469-802-1015ND
2015-10-209469-803-1006ND
2015-10-209469-804-0936ND
2015-10-209469-805-0948ND
2015-10-209469-806-0954ND
2015-10-209469-807-1022ND
2016-01-119469-800-100511.3 ppb
2016-01-119469-801-105411.8 ppb
2016-01-119469-802-11019.13 ppb
2016-01-119469-803-11219.19 ppb
2016-01-119469-804-11508.69 ppb
2016-01-119469-805-113411.5 ppb
2016-01-119469-806-114110.8 ppb
2016-01-119469-807-111010.4 ppb
2016-05-189469-800-1119ND
2016-05-189469-801-1126ND
2016-05-189469-802-09001.01 ppb
2016-05-189469-803-11351.20 ppb
2016-05-189469-804-1049ND
2016-05-189469-805-11002.22 ppb
2016-05-189469-806-11093.06 ppb
2016-05-189469-807-0850ND
2016-07-189469-800-13241.21 ppb
2016-07-189469-801-1318ND
2016-07-189469-802-1303ND
2016-07-189469-803-1255ND
2016-07-189469-804-1246ND
2016-07-189469-805-12306.94 ppb
2016-07-189469-806-1236ND
2016-07-189469-807-1310ND
2016-10-119469-800-0918ND
2016-10-119469-801-0722ND
2016-10-119469-802-0739ND
2016-10-119469-803-1028ND
2016-10-119469-804-09072.51 ppb
2016-10-119469-805-0857ND
2016-10-119469-806-0847ND
2016-10-119469-807-0818ND
2017-03-209469-800-11101.91 ppb
2017-03-209469-801-11182.42 ppb
2017-03-209469-802-11332.55 ppb
2017-03-209469-803-12532.64 ppb
2017-03-209469-804-13291.96 ppb
2017-03-209469-805-13062.51 ppb
2017-03-209469-806-13181.89 ppb
2017-03-209469-807-11274.18 ppb
2017-04-179469-800-1020ND
2017-04-179469-801-1026ND
2017-04-179469-802-1034ND
2017-04-179469-803-0847ND
2017-04-179469-804-10552.45 ppb
2017-04-179469-805-0900ND
2017-04-179469-806-1046ND
2017-04-179469-807-0746ND
2017-10-039469-800-09201.23 ppb
2017-10-039469-801-0727ND
2017-10-039469-802-09293.13 ppb
2017-10-039469-803-0938ND
2017-10-039469-804-10153.92 ppb
2017-10-039469-805-1000ND
2017-10-039469-806-0950ND
2017-10-039469-807-08106.97 ppb
2017-10-179469-800-1017ND
2017-10-179469-801-1029ND
2017-10-179469-802-1035ND
2017-10-179469-803-1106ND
2017-10-179469-804-1123ND
2017-10-179469-805-1130ND
2017-10-179469-806-1114ND
2017-10-179469-807-10541.46 ppb
2018-01-169469-800-0650ND
2018-01-169469-801-0655ND
2018-01-169469-802-0707ND
2018-01-169469-803-0735ND
2018-01-169469-804-0914ND
2018-01-169469-805-1044ND
2018-01-169469-806-1031ND
2018-01-169469-807-1019ND
2018-04-239469-800-11501.64 ppb
2018-04-239469-801-1205ND
2018-04-239469-802-1211ND
2018-04-239469-803-1229ND
2018-04-239469-804-1300ND
2018-04-239469-805-12491.15 ppb
2018-04-239469-806-1240ND
2018-04-239469-807-1218ND
2018-07-179469-800-0720ND
2018-07-179469-801-12081.21 ppb
2018-07-179469-802-08361.03 ppb
2018-07-179469-803-07421.04 ppb
2018-07-179469-804-09131.25 ppb
2018-07-179469-805-09021.45 ppb
2018-07-179469-806-0853ND
2018-07-179469-807-08222.79 ppb
2018-10-169469-800-0732ND
2018-10-169469-801-1145ND
2018-10-169469-802-0804ND
2018-10-169469-803-07491.01 ppb
2018-10-169469-804-09351.25 ppb
2018-10-169469-805-09241.06 ppb
2018-10-169469-806-09121.09 ppb
2018-10-169469-807-0852ND
2019-01-159469-800-0705ND
2019-01-159469-801-0714ND
2019-01-159469-802-07211.000 ppb
2019-01-159469-803-0734ND
2019-01-159469-804-10103.43 ppb
2019-01-159469-805-09554.40 ppb
2019-01-159469-806-09482.84 ppb
2019-01-159469-807-0935ND
2019-04-239469-800-0723ND
2019-04-239469-801-1027ND
2019-04-239469-802-1016ND
2019-04-239469-803-0836ND
2019-04-239469-804-09003.51 ppb
2019-04-239469-805-08513.19 ppb
2019-04-239469-806-08443.82 ppb
2019-04-239469-807-08172.54 ppb
2019-10-159469-800-0744ND
2019-10-159469-801-0751ND
2019-10-159469-802-0802ND
2019-10-159469-803-0817ND
2019-10-159469-804-0850ND
2019-10-159469-805-0841ND
2019-10-159469-806-0831ND
2019-10-159469-807-0807ND