Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

City of Fountain Valley

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)

92

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.97 ppb3224ND - 11.6 ppb
20153.17 ppb3219ND - 11.5 ppb
20161.44 ppb3211ND - 17.4 ppb
20174.35 ppb4025ND - 14.3 ppb
20181.40 ppb2412ND - 5.70 ppb
20190.0313 ppb321ND - 1.000 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
2014-03-173761-801-12229.00 ppb
2014-03-173761-802-14496.50 ppb
2014-03-173761-803-15093.30 ppb
2014-03-173761-804-15183.40 ppb
2014-03-173761-805-120211.6 ppb
2014-03-173761-806-114910.3 ppb
2014-03-173761-807-113210.3 ppb
2014-03-173761-808-12109.60 ppb
2014-06-293761-801-11091.50 ppb
2014-06-293761-802-11161.60 ppb
2014-06-293761-803-11292.00 ppb
2014-06-293761-804-11372.10 ppb
2014-06-293761-805-11011.30 ppb
2014-06-293761-806-1043ND
2014-06-293761-807-1035ND
2014-06-293761-808-10503.80 ppb
2014-09-083761-801-12412.50 ppb
2014-09-083761-802-14251.80 ppb
2014-09-083761-803-14321.30 ppb
2014-09-083761-804-14402.70 ppb
2014-09-083761-805-12322.40 ppb
2014-09-083761-806-11582.40 ppb
2014-09-083761-807-1149ND
2014-09-083761-808-1206ND
2014-12-223761-801-11051.10 ppb
2014-12-223761-802-13001.50 ppb
2014-12-223761-803-13101.50 ppb
2014-12-223761-804-13151.40 ppb
2014-12-223761-805-1045ND
2014-12-223761-806-1025ND
2014-12-223761-807-1015ND
2014-12-223761-808-1300ND
2015-03-093761-801-0950ND
2015-03-093761-802-12251.000 ppb
2015-03-093761-803-12401.10 ppb
2015-03-093761-804-12551.10 ppb
2015-03-093761-805-0930ND
2015-03-093761-806-0900ND
2015-03-093761-807-0850ND
2015-03-093761-808-1210ND
2015-06-013761-801-1035ND
2015-06-013761-802-12401.10 ppb
2015-06-013761-803-1250ND
2015-06-013761-804-1300ND
2015-06-013761-805-1015ND
2015-06-013761-806-0950ND
2015-06-013761-807-09401.10 ppb
2015-06-013761-808-1415ND
2015-09-073761-801-06309.40 ppb
2015-09-073761-802-083010.3 ppb
2015-09-073761-803-08409.50 ppb
2015-09-073761-804-085010.1 ppb
2015-09-073761-805-06107.40 ppb
2015-09-073761-806-0550ND
2015-09-073761-807-05401.10 ppb
2015-09-073761-808-100011.5 ppb
2015-12-073761-801-07505.30 ppb
2015-12-073761-802-10006.40 ppb
2015-12-073761-803-10153.60 ppb
2015-12-073761-804-10303.70 ppb
2015-12-073761-805-0725ND
2015-12-073761-806-07005.90 ppb
2015-12-073761-807-06454.40 ppb
2015-12-073761-808-11457.50 ppb
2016-03-073761-801-09352.40 ppb
2016-03-073761-802-11502.60 ppb
2016-03-073761-803-12002.50 ppb
2016-03-073761-804-12102.80 ppb
2016-03-073761-805-09152.40 ppb
2016-03-073761-806-0855ND
2016-03-073761-807-0845ND
2016-03-073761-808-11402.50 ppb
2016-06-063761-801-1130ND
2016-06-063761-802-1330ND
2016-06-063761-803-1340ND
2016-06-063761-804-13501.20 ppb
2016-06-063761-805-1110ND
2016-06-063761-806-1050ND
2016-06-063761-807-1040ND
2016-06-063761-808-15002.80 ppb
2016-09-053761-801-0730ND
2016-09-053761-802-0930ND
2016-09-053761-803-09401.000 ppb
2016-09-053761-804-0950ND
2016-09-053761-805-0710ND
2016-09-053761-806-0650ND
2016-09-053761-807-0640ND
2016-09-053761-808-110017.4 ppb
2016-12-053761-801-1030ND
2016-12-053761-802-1230ND
2016-12-053761-803-1240ND
2016-12-053761-804-1250ND
2016-12-053761-805-1010ND
2016-12-053761-806-0950ND
2016-12-053761-807-0940ND
2016-12-053761-808-14008.50 ppb
2017-02-273761-801-1030ND
2017-02-273761-802-1230ND
2017-02-273761-803-1240ND
2017-02-273761-804-1250ND
2017-02-273761-805-1010ND
2017-02-273761-806-0950ND
2017-02-273761-807-0940ND
2017-02-273761-808-140014.3 ppb
2017-06-053761-801-1030ND
2017-06-053761-802-1230ND
2017-06-053761-803-1240ND
2017-06-053761-804-1250ND
2017-06-053761-805-1010ND
2017-06-053761-806-0950ND
2017-06-053761-807-0940ND
2017-06-053761-808-14002.40 ppb
2017-09-043761-801-08306.90 ppb
2017-09-043761-802-10307.20 ppb
2017-09-043761-803-10407.00 ppb
2017-09-043761-804-1050ND
2017-09-043761-805-08106.80 ppb
2017-09-043761-806-07506.90 ppb
2017-09-043761-807-07407.10 ppb
2017-09-043761-808-12006.80 ppb
2017-12-043761-801-10407.00 ppb
2017-12-043761-802-12406.10 ppb
2017-12-043761-803-12506.50 ppb
2017-12-043761-804-13007.50 ppb
2017-12-043761-805-10205.70 ppb
2017-12-043761-806-10005.60 ppb
2017-12-043761-807-09505.60 ppb
2017-12-043761-808-10356.00 ppb
2017-12-153761-801-11484.70 ppb
2017-12-153761-802-11577.00 ppb
2017-12-153761-803-12054.40 ppb
2017-12-153761-804-12135.10 ppb
2017-12-153761-805-114010.3 ppb
2017-12-153761-806-11229.90 ppb
2017-12-153761-807-11108.30 ppb
2017-12-153761-808-11309.00 ppb
2018-06-113761-801-10003.60 ppb
2018-06-113761-802-12003.70 ppb
2018-06-113761-803-12101.20 ppb
2018-06-113761-804-12203.30 ppb
2018-06-113761-805-0940ND
2018-06-113761-806-0920ND
2018-06-113761-807-09105.30 ppb
2018-06-113761-808-09555.30 ppb
2018-09-103761-801-1000ND
2018-09-103761-802-1200ND
2018-09-103761-803-1210ND
2018-09-103761-804-1220ND
2018-09-103761-805-0940ND
2018-09-103761-806-0920ND
2018-09-103761-807-0910ND
2018-09-103761-808-1230ND
2018-12-103761-801-09501.000 ppb
2018-12-103761-802-11501.000 ppb
2018-12-103761-803-12001.10 ppb
2018-12-103761-804-12101.30 ppb
2018-12-103761-805-0930ND
2018-12-103761-806-0910ND
2018-12-103761-807-09001.20 ppb
2018-12-103761-808-09455.70 ppb
2019-03-113761-801-0950ND
2019-03-113761-802-1150ND
2019-03-113761-803-1200ND
2019-03-113761-804-1210ND
2019-03-113761-805-0930ND
2019-03-113761-806-0910ND
2019-03-113761-807-0900ND
2019-03-113761-808-1320ND
2019-06-103761-801-1030ND
2019-06-103761-802-1230ND
2019-06-103761-803-1240ND
2019-06-103761-804-1250ND
2019-06-103761-805-1010ND
2019-06-103761-806-0950ND
2019-06-103761-807-0940ND
2019-06-103761-808-1400ND
2019-09-093761-801-0930ND
2019-09-093761-802-1140ND
2019-09-093761-803-1150ND
2019-09-093761-804-1200ND
2019-09-093761-805-0920ND
2019-09-093761-806-0900ND
2019-09-093761-807-0850ND
2019-09-093761-808-1310ND
2019-12-093761-801-12101.000 ppb
2019-12-093761-802-0910ND
2019-12-093761-803-0920ND
2019-12-093761-804-0930ND
2019-12-093761-805-1150ND
2019-12-093761-806-1130ND
2019-12-093761-807-1120ND
2019-12-093761-808-1205ND