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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Orange

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

 

176

Samples

0

Samples exceeding legal limit (MCL)

143

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201411.3 ppb1615ND - 21.5 ppb
20156.75 ppb3230ND - 17.5 ppb
20162.19 ppb3221ND - 9.70 ppb
20172.83 ppb3224ND - 10.7 ppb
20183.52 ppb3229ND - 8.90 ppb
20193.18 ppb3224ND - 9.70 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
2014-02-123761-801-10211.000 ppb
2014-02-123761-802-10021.40 ppb
2014-02-123761-803-091211.8 ppb
2014-02-123761-804-092410.4 ppb
2014-02-123761-805-09457.70 ppb
2014-02-123761-806-093610.8 ppb
2014-02-123761-807-090012.4 ppb
2014-02-123761-808-1040ND
2014-08-133761-801-090715.3 ppb
2014-08-133761-802-085311.7 ppb
2014-08-133761-803-080119.2 ppb
2014-08-133761-804-081121.5 ppb
2014-08-133761-805-083817.5 ppb
2014-08-133761-806-082216.3 ppb
2014-08-133761-807-074819.5 ppb
2014-08-133761-808-09203.70 ppb
2015-02-053761-801-10371.70 ppb
2015-02-053761-802-11122.30 ppb
2015-02-053761-803-09379.30 ppb
2015-02-053761-804-094510.00 ppb
2015-02-053761-805-10118.70 ppb
2015-02-053761-806-095610.4 ppb
2015-02-053761-807-09219.70 ppb
2015-02-053761-808-10562.60 ppb
2015-05-203761-801-09452.20 ppb
2015-05-203761-802-0933ND
2015-05-203761-803-083314.2 ppb
2015-05-203761-804-084013.6 ppb
2015-05-203761-805-09185.50 ppb
2015-05-203761-806-090412.6 ppb
2015-05-203761-807-082015.5 ppb
2015-05-203761-808-10031.50 ppb
2015-08-133761-801-11202.40 ppb
2015-08-133761-802-11003.10 ppb
2015-08-133761-803-101113.4 ppb
2015-08-133761-804-102017.5 ppb
2015-08-133761-805-10504.70 ppb
2015-08-133761-806-103117.3 ppb
2015-08-133761-807-095811.1 ppb
2015-08-133761-808-11303.50 ppb
2015-11-183761-801-1102ND
2015-11-183761-802-10501.10 ppb
2015-11-183761-803-10093.10 ppb
2015-11-183761-804-10184.10 ppb
2015-11-183761-805-10382.80 ppb
2015-11-183761-806-10274.10 ppb
2015-11-183761-807-09586.30 ppb
2015-11-183761-808-11121.70 ppb
2016-02-183761-801-09302.40 ppb
2016-02-183761-802-0913ND
2016-02-183761-803-0822ND
2016-02-183761-804-0833ND
2016-02-183761-805-08581.40 ppb
2016-02-183761-806-0844ND
2016-02-183761-807-08126.20 ppb
2016-02-183761-808-09421.50 ppb
2016-05-183761-801-10421.80 ppb
2016-05-183761-802-10292.60 ppb
2016-05-183761-803-09224.30 ppb
2016-05-183761-804-09294.60 ppb
2016-05-183761-805-10181.90 ppb
2016-05-183761-806-10004.60 ppb
2016-05-183761-807-09149.70 ppb
2016-05-183761-808-10511.000 ppb
2016-08-173761-801-0916ND
2016-08-173761-802-09031.40 ppb
2016-08-173761-803-08023.80 ppb
2016-08-173761-804-08103.50 ppb
2016-08-173761-805-08373.00 ppb
2016-08-173761-806-08223.10 ppb
2016-08-173761-807-07506.10 ppb
2016-08-173761-808-0927ND
2016-11-163761-801-0956ND
2016-11-163761-802-09462.00 ppb
2016-11-163761-803-0901ND
2016-11-163761-804-0910ND
2016-11-163761-805-09321.80 ppb
2016-11-163761-806-0922ND
2016-11-163761-807-08503.40 ppb
2016-11-163761-808-1008ND
2017-02-153761-801-10092.90 ppb
2017-02-153761-802-09581.40 ppb
2017-02-153761-803-09203.10 ppb
2017-02-153761-804-0926ND
2017-02-153761-805-09471.10 ppb
2017-02-153761-806-0936ND
2017-02-153761-807-091110.7 ppb
2017-02-153761-808-1035ND
2017-05-103761-801-09242.00 ppb
2017-05-103761-802-09121.20 ppb
2017-05-103761-803-0808ND
2017-05-103761-804-0818ND
2017-05-103761-805-0900ND
2017-05-103761-806-0830ND
2017-05-103761-807-07596.30 ppb
2017-05-103761-808-09391.60 ppb
2017-08-173761-801-10101.10 ppb
2017-08-173761-802-1000ND
2017-08-173761-803-09253.10 ppb
2017-08-173761-804-09323.00 ppb
2017-08-173761-805-09502.00 ppb
2017-08-173761-806-09392.50 ppb
2017-08-173761-807-09159.20 ppb
2017-08-173761-808-10202.10 ppb
2017-11-293761-801-10043.60 ppb
2017-11-293761-802-09522.60 ppb
2017-11-293761-803-09094.10 ppb
2017-11-293761-804-09164.50 ppb
2017-11-293761-805-09411.000 ppb
2017-11-293761-806-09273.80 ppb
2017-11-293761-807-085510.5 ppb
2017-11-293761-808-10157.20 ppb
2018-02-153761-801-09575.00 ppb
2018-02-153761-802-09463.30 ppb
2018-02-153761-803-09046.10 ppb
2018-02-153761-804-09116.00 ppb
2018-02-153761-805-09343.70 ppb
2018-02-153761-806-09226.30 ppb
2018-02-153761-807-08508.90 ppb
2018-02-153761-808-10052.80 ppb
2018-05-163761-801-09402.00 ppb
2018-05-163761-802-0927ND
2018-05-163761-803-08521.70 ppb
2018-05-163761-804-08571.50 ppb
2018-05-163761-805-09183.00 ppb
2018-05-163761-806-09041.000 ppb
2018-05-163761-807-08443.70 ppb
2018-05-163761-808-0948ND
2018-08-153761-801-09494.30 ppb
2018-08-153761-802-09401.20 ppb
2018-08-153761-803-09025.30 ppb
2018-08-153761-804-09115.20 ppb
2018-08-153761-805-09295.50 ppb
2018-08-153761-806-09155.30 ppb
2018-08-153761-807-08542.60 ppb
2018-08-153761-808-09586.20 ppb
2018-11-153761-801-11141.000 ppb
2018-11-153761-802-11051.000 ppb
2018-11-153761-803-10345.00 ppb
2018-11-153761-804-10395.10 ppb
2018-11-153761-805-1054ND
2018-11-153761-806-10455.00 ppb
2018-11-153761-807-10273.80 ppb
2018-11-153761-808-11221.20 ppb
2019-02-203761-801-10403.70 ppb
2019-02-203761-802-1031ND
2019-02-203761-803-09585.10 ppb
2019-02-203761-804-1003ND
2019-02-203761-805-1020ND
2019-02-203761-806-1011ND
2019-02-203761-807-09515.20 ppb
2019-02-203761-808-10473.90 ppb
2019-05-153761-801-10092.50 ppb
2019-05-153761-802-10001.90 ppb
2019-05-153761-803-09285.20 ppb
2019-05-153761-804-09345.00 ppb
2019-05-153761-805-09513.60 ppb
2019-05-153761-806-09415.30 ppb
2019-05-153761-807-09179.70 ppb
2019-05-153761-808-10161.000 ppb
2019-08-143761-801-1010ND
2019-08-143761-802-1001ND
2019-08-143761-803-09252.80 ppb
2019-08-143761-804-09323.10 ppb
2019-08-143761-805-09492.50 ppb
2019-08-143761-806-09402.20 ppb
2019-08-143761-807-09172.00 ppb
2019-08-143761-808-1017ND
2019-11-223761-801-09266.10 ppb
2019-11-223761-802-0917ND
2019-11-223761-803-08446.00 ppb
2019-11-223761-804-08507.20 ppb
2019-11-223761-805-09075.80 ppb
2019-11-223761-806-08571.10 ppb
2019-11-223761-807-08388.20 ppb
2019-11-223761-808-09332.50 ppb