Haloacetic acids (HAA9)
City of Garden Grove
Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of nine haloacetic acids includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid, which are regulated as a group by the federal government (HAA5); and bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, and tribromoacetic 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
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | 0.616 ppb | 8 | 8 | 0.350 ppb - 0.910 ppb |
2019 | 0.638 ppb | 24 | 24 | 0.410 ppb - 1.20 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.06 ppb
The EWG Health Guideline of 0.06 ppb for the group of nine haloacetic acids, or HAA9, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level as . This health guideline protects against cancer.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2018-10-16 | 18100512-02 | 0.380 ppb |
2018-10-16 | 18100514-02 | 0.910 ppb |
2018-10-16 | 18100510-02 | 0.880 ppb |
2018-10-16 | 18100511-02 | 0.850 ppb |
2018-10-16 | 18100515-02 | 0.350 ppb |
2018-10-16 | 18100509-02 | 0.370 ppb |
2018-10-16 | 18100508-02 | 0.680 ppb |
2018-10-16 | 18100513-02 | 0.510 ppb |
2019-01-30 | 19010735-02 | 0.530 ppb |
2019-01-30 | 19010741-02 | 0.860 ppb |
2019-01-30 | 19010739-02 | 0.650 ppb |
2019-01-30 | 19010738-02 | 1.20 ppb |
2019-01-30 | 19010737-02 | 0.670 ppb |
2019-01-30 | 19010740-02 | 0.470 ppb |
2019-01-30 | 19010734-02 | 0.700 ppb |
2019-01-30 | 19010736-02 | 0.440 ppb |
2019-04-24 | 19040869-02 | 0.540 ppb |
2019-04-24 | 19040870-02 | 0.530 ppb |
2019-04-24 | 19040868-02 | 0.410 ppb |
2019-04-24 | 19040867-02 | 0.480 ppb |
2019-04-24 | 19040866-02 | 0.480 ppb |
2019-04-24 | 19040865-02 | 0.560 ppb |
2019-04-24 | 19040864-02 | 0.600 ppb |
2019-04-24 | 19040871-02 | 0.500 ppb |
2019-07-31 | 19070910-02 | 0.820 ppb |
2019-07-31 | 19070908-02 | 0.430 ppb |
2019-07-31 | 19070907-02 | 0.860 ppb |
2019-07-31 | 19070911-02 | 0.870 ppb |
2019-07-31 | 19070912-02 | 0.830 ppb |
2019-07-31 | 19070909-02 | 0.440 ppb |
2019-07-31 | 19070913-02 | 0.520 ppb |
2019-07-31 | 19070914-02 | 0.920 ppb |