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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Tustin

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

125

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20146.26 ppb3224ND - 20.4 ppb
20155.29 ppb3222ND - 15.5 ppb
20161.69 ppb3219ND - 5.90 ppb
20172.06 ppb3220ND - 10.1 ppb
20181.95 ppb3223ND - 6.30 ppb
20191.90 ppb3217ND - 6.70 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
2014-03-113761-801-104510.4 ppb
2014-03-113761-802-12357.90 ppb
2014-03-113761-803-1005ND
2014-03-113761-804-09051.50 ppb
2014-03-113761-805-1130ND
2014-03-113761-806-1025ND
2014-03-113761-807-09203.70 ppb
2014-03-113761-808-094510.3 ppb
2014-06-103761-801-121016.5 ppb
2014-06-103761-802-085016.4 ppb
2014-06-103761-803-10101.40 ppb
2014-06-103761-804-11005.50 ppb
2014-06-103761-805-1035ND
2014-06-103761-806-115517.1 ppb
2014-06-103761-807-11156.30 ppb
2014-06-103761-808-113520.4 ppb
2014-09-093761-801-101015.0 ppb
2014-09-093761-802-125016.6 ppb
2014-09-093761-803-0945ND
2014-09-093761-804-08403.60 ppb
2014-09-093761-805-1040ND
2014-09-093761-806-100014.4 ppb
2014-09-093761-807-08554.20 ppb
2014-09-093761-808-093014.8 ppb
2014-12-023761-801-09201.10 ppb
2014-12-023761-802-11255.70 ppb
2014-12-023761-803-0735ND
2014-12-023761-804-08251.000 ppb
2014-12-023761-805-0855ND
2014-12-023761-806-09101.10 ppb
2014-12-023761-807-09402.20 ppb
2014-12-023761-808-07453.10 ppb
2015-03-103761-801-121010.5 ppb
2015-03-103761-802-130010.00 ppb
2015-03-103761-803-1000ND
2015-03-103761-804-10551.50 ppb
2015-03-103761-805-10253.00 ppb
2015-03-103761-806-120011.2 ppb
2015-03-103761-807-11101.30 ppb
2015-03-103761-808-113011.3 ppb
2015-06-093761-801-092015.2 ppb
2015-06-093761-802-101015.5 ppb
2015-06-093761-803-0810ND
2015-06-093761-804-0855ND
2015-06-093761-805-10151.70 ppb
2015-06-093761-806-091013.5 ppb
2015-06-093761-807-0900ND
2015-06-093761-808-082013.4 ppb
2015-09-083761-801-11008.60 ppb
2015-09-083761-802-13208.60 ppb
2015-09-083761-803-1020ND
2015-09-083761-804-09101.50 ppb
2015-09-083761-805-113512.3 ppb
2015-09-083761-806-104510.5 ppb
2015-09-083761-807-09251.10 ppb
2015-09-083761-808-100510.4 ppb
2015-12-083761-801-11055.80 ppb
2015-12-083761-802-1230ND
2015-12-083761-803-1010ND
2015-12-083761-804-09101.10 ppb
2015-12-083761-805-1030ND
2015-12-083761-806-1050ND
2015-12-083761-807-09251.20 ppb
2015-12-083761-808-0955ND
2016-03-083761-801-10003.70 ppb
2016-03-083761-802-1130ND
2016-03-083761-803-0900ND
2016-03-083761-804-08302.10 ppb
2016-03-083761-805-0900ND
2016-03-083761-806-09403.40 ppb
2016-03-083761-807-08401.80 ppb
2016-03-083761-808-09103.20 ppb
2016-06-073761-801-11053.30 ppb
2016-06-073761-802-13002.40 ppb
2016-06-073761-803-09201.30 ppb
2016-06-073761-804-0950ND
2016-06-073761-805-11251.90 ppb
2016-06-073761-806-10553.50 ppb
2016-06-073761-807-10051.000 ppb
2016-06-073761-808-10403.90 ppb
2016-09-063761-801-12004.50 ppb
2016-09-063761-802-0800ND
2016-09-063761-803-10001.10 ppb
2016-09-063761-804-10351.10 ppb
2016-09-063761-805-1010ND
2016-09-063761-806-1145ND
2016-09-063761-807-10451.30 ppb
2016-09-063761-808-1110ND
2016-12-063761-801-09203.00 ppb
2016-12-063761-802-1125ND
2016-12-063761-803-0910ND
2016-12-063761-804-0750ND
2016-12-063761-805-0945ND
2016-12-063761-806-09305.80 ppb
2016-12-063761-807-0815ND
2016-12-063761-808-10005.90 ppb
2017-03-073761-801-11402.20 ppb
2017-03-073761-802-13054.00 ppb
2017-03-073761-803-1050ND
2017-03-073761-804-09252.00 ppb
2017-03-073761-805-1105ND
2017-03-073761-806-1125ND
2017-03-073761-807-09501.60 ppb
2017-03-073761-808-1030ND
2017-06-063761-801-11354.20 ppb
2017-06-063761-802-1250ND
2017-06-063761-803-1050ND
2017-06-063761-804-09201.30 ppb
2017-06-063761-805-1100ND
2017-06-063761-806-11201.10 ppb
2017-06-063761-807-09401.000 ppb
2017-06-063761-808-1025ND
2017-09-053761-801-09552.50 ppb
2017-09-053761-802-11201.80 ppb
2017-09-053761-803-0920ND
2017-09-053761-804-0825ND
2017-09-053761-805-093010.1 ppb
2017-09-053761-806-09452.60 ppb
2017-09-053761-807-0840ND
2017-09-053761-808-09102.40 ppb
2017-12-053761-801-10006.40 ppb
2017-12-053761-802-07454.20 ppb
2017-12-053761-803-08302.30 ppb
2017-12-053761-804-09051.20 ppb
2017-12-053761-805-1025ND
2017-12-053761-806-09456.60 ppb
2017-12-053761-807-09151.50 ppb
2017-12-053761-808-08406.90 ppb
2018-03-063761-801-10405.20 ppb
2018-03-063761-802-1125ND
2018-03-063761-803-09551.80 ppb
2018-03-063761-804-10102.40 ppb
2018-03-063761-805-0935ND
2018-03-063761-806-1050ND
2018-03-063761-807-10201.90 ppb
2018-03-063761-808-1030ND
2018-06-053761-801-10354.30 ppb
2018-06-053761-802-1210ND
2018-06-053761-803-08401.000 ppb
2018-06-053761-804-09301.60 ppb
2018-06-053761-806-1020ND
2018-06-053761-807-09451.70 ppb
2018-06-053761-808-09001.000 ppb
2018-06-213761-805-1015ND
2018-09-043761-801-10404.90 ppb
2018-09-043761-802-1240ND
2018-09-043761-803-08551.40 ppb
2018-09-043761-804-09352.00 ppb
2018-09-043761-805-11051.60 ppb
2018-09-043761-806-10256.30 ppb
2018-09-043761-807-09552.00 ppb
2018-09-043761-808-09155.80 ppb
2018-12-043761-801-11106.00 ppb
2018-12-043761-802-12303.70 ppb
2018-12-043761-803-0900ND
2018-12-043761-804-09451.90 ppb
2018-12-043761-805-10301.10 ppb
2018-12-043761-806-11001.50 ppb
2018-12-043761-807-10001.90 ppb
2018-12-043761-808-09201.30 ppb
2019-03-053761-801-1044ND
2019-03-053761-802-0747ND
2019-03-053761-803-0900ND
2019-03-053761-804-09402.00 ppb
2019-03-053761-805-1052ND
2019-03-053761-806-1025ND
2019-03-053761-807-09561.60 ppb
2019-03-053761-808-0915ND
2019-06-043761-801-11006.70 ppb
2019-06-043761-802-07501.90 ppb
2019-06-043761-803-0925ND
2019-06-043761-804-10102.00 ppb
2019-06-043761-805-0910ND
2019-06-043761-806-10455.30 ppb
2019-06-043761-807-10202.00 ppb
2019-06-043761-808-09456.30 ppb
2019-09-033761-801-09554.30 ppb
2019-09-033761-802-12051.10 ppb
2019-09-033761-803-0825ND
2019-09-033761-804-0920ND
2019-09-033761-805-1030ND
2019-09-033761-806-09454.20 ppb
2019-09-033761-807-0930ND
2019-09-033761-808-08456.00 ppb
2019-12-033761-801-12252.20 ppb
2019-12-033761-802-09154.80 ppb
2019-12-033761-803-10503.40 ppb
2019-12-033761-804-11253.70 ppb
2019-12-033761-805-1110ND
2019-12-033761-806-1215ND
2019-12-033761-807-11353.20 ppb
2019-12-033761-808-1155ND