Dichloroacetic acid
City of Norfolk
Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 12.3 ppb | 40 | 40 | 7.50 ppb - 17.0 ppb |
2015 | 14.9 ppb | 39 | 39 | 7.00 ppb - 21.0 ppb |
2016 | 19.4 ppb | 38 | 38 | 9.10 ppb - 28.0 ppb |
2017 | 15.4 ppb | 40 | 40 | 10.00 ppb - 20.0 ppb |
2018 | 13.3 ppb | 36 | 36 | 7.09 ppb - 19.0 ppb |
2019 | 13.9 ppb | 34 | 34 | 7.00 ppb - 21.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-02-11 | 201402120963-HAA | 10.00 ppb |
2014-02-11 | 201402120962-HAA | 9.30 ppb |
2014-02-11 | 201402120967-HAA | 8.90 ppb |
2014-02-11 | 201402120970-HAA | 8.60 ppb |
2014-02-11 | 201402120969-HAA | 8.40 ppb |
2014-02-11 | 201402120964-HAA | 8.10 ppb |
2014-02-11 | 201402120966-HAA | 8.00 ppb |
2014-02-11 | 201402120965-HAA | 7.80 ppb |
2014-02-11 | 201402120971-HAA | 7.80 ppb |
2014-02-11 | 201402120968-HAA | 7.50 ppb |
2014-05-13 | 201405140912-HAA | 16.0 ppb |
2014-05-13 | 201405140910-HAA | 15.0 ppb |
2014-05-13 | 201405140915-HAA | 14.0 ppb |
2014-05-13 | 201405140916-HAA | 14.0 ppb |
2014-05-13 | 201405140911-HAA | 14.0 ppb |
2014-05-13 | 201405140909-HAA | 13.0 ppb |
2014-05-13 | 201405140914-HAA | 13.0 ppb |
2014-05-13 | 201405140917-HAA | 13.0 ppb |
2014-05-13 | 201405140913-HAA | 13.0 ppb |
2014-05-13 | 201405140918-HAA | 12.0 ppb |
2014-08-12 | 201408130541-HAA | 17.0 ppb |
2014-08-12 | 201408130538-HAA | 16.0 ppb |
2014-08-12 | 201408130539-HAA | 15.0 ppb |
2014-08-12 | 201408130537-HAA | 15.0 ppb |
2014-08-12 | 201408130535-HAA | 15.0 ppb |
2014-08-12 | 201408130536-HAA | 15.0 ppb |
2014-08-12 | 201408130534-HAA | 15.0 ppb |
2014-08-12 | 201408130542-HAA | 15.0 ppb |
2014-08-12 | 201408130540-HAA | 14.0 ppb |
2014-08-12 | 201408130533-HAA | 14.0 ppb |
2014-11-12 | 201411130636-HAA | 14.0 ppb |
2014-11-12 | 201411130638-HAA | 13.0 ppb |
2014-11-12 | 201411130637-HAA | 13.0 ppb |
2014-11-12 | 201411130639-HAA | 13.0 ppb |
2014-11-12 | 201411130635-HAA | 12.0 ppb |
2014-11-12 | 201411130633-HAA | 12.0 ppb |
2014-11-12 | 201411130640-HAA | 11.0 ppb |
2014-11-12 | 201411130641-HAA | 10.00 ppb |
2014-11-12 | 201411130634-HAA | 10.00 ppb |
2014-11-12 | 201411130632-HAA | 9.60 ppb |
2015-02-10 | 460260-EUROFINS | 14.0 ppb |
2015-02-10 | 460260-EUROFINS | 12.0 ppb |
2015-02-10 | 460260-EUROFINS | 12.0 ppb |
2015-02-10 | 460260-EUROFINS | 12.0 ppb |
2015-02-10 | 460260-EUROFINS | 12.0 ppb |
2015-02-10 | 460260-EUROFINS | 12.0 ppb |
2015-02-10 | 460260-EUROFINS | 9.80 ppb |
2015-02-10 | 460260-EUROFINS | 7.80 ppb |
2015-02-10 | 460260-EUROFINS | 7.20 ppb |
2015-02-10 | 460260-EUROFINS | 7.00 ppb |
2015-05-12 | 460260-EUROFINS | 18.0 ppb |
2015-05-12 | 460260-EUROFINS | 18.0 ppb |
2015-05-12 | 460260-EUROFINS | 17.0 ppb |
2015-05-12 | 460260-EUROFINS | 16.0 ppb |
2015-05-12 | 460260-EUROFINS | 16.0 ppb |
2015-05-12 | 460260-EUROFINS | 16.0 ppb |
2015-05-12 | 460260-EUROFINS | 15.0 ppb |
2015-05-12 | 460260-EUROFINS | 14.0 ppb |
2015-05-12 | 460260-EUROFINS | 13.0 ppb |
2015-08-11 | 460260-EUROFINS | 21.0 ppb |
2015-08-11 | 460260-EUROFINS | 21.0 ppb |
2015-08-11 | 460260-EUROFINS | 20.0 ppb |
2015-08-11 | 460260-EUROFINS | 19.0 ppb |
2015-08-11 | 460260-EUROFINS | 19.0 ppb |
2015-08-11 | 460260-EUROFINS | 18.0 ppb |
2015-08-11 | 460260-EUROFINS | 18.0 ppb |
2015-08-11 | 460260-EUROFINS | 17.0 ppb |
2015-08-11 | 460260-EUROFINS | 17.0 ppb |
2015-08-11 | 460260-EUROFINS | 16.0 ppb |
2015-11-09 | 460260-EUROFINS | 18.0 ppb |
2015-11-09 | 460260-EUROFINS | 17.0 ppb |
2015-11-09 | 460260-EUROFINS | 16.0 ppb |
2015-11-09 | 460260-EUROFINS | 16.0 ppb |
2015-11-09 | 460260-EUROFINS | 16.0 ppb |
2015-11-09 | 460260-EUROFINS | 15.0 ppb |
2015-11-09 | 460260-EUROFINS | 14.0 ppb |
2015-11-09 | 460260-EUROFINS | 12.0 ppb |
2015-11-09 | 460260-EUROFINS | 12.0 ppb |
2015-11-09 | 460260-EUROFINS | 11.0 ppb |
2016-02-09 | 201602100450-HAA | 15.0 ppb |
2016-02-09 | 201602100451-HAA | 15.0 ppb |
2016-02-09 | 201602100449-HAA | 14.0 ppb |
2016-02-09 | 201602100452-HAA | 14.0 ppb |
2016-02-09 | 201602100453-HAA | 13.0 ppb |
2016-02-09 | 201602100447-HAA | 12.0 ppb |
2016-02-09 | 201602100455-HAA | 11.0 ppb |
2016-02-09 | 201602100454-HAA | 10.00 ppb |
2016-02-09 | 201602100448-HAA | 9.80 ppb |
2016-02-09 | 201602100446-HAA | 9.10 ppb |
2016-05-10 | 16055867-HAA | 16.0 ppb |
2016-05-10 | 16055868-HAA | 16.0 ppb |
2016-05-10 | 16055870-HAA | 16.0 ppb |
2016-05-10 | 16055869-HAA | 15.0 ppb |
2016-05-10 | 16055872-HAA | 15.0 ppb |
2016-05-10 | 16055873-HAA | 15.0 ppb |
2016-05-10 | 16055871-HAA | 14.0 ppb |
2016-05-10 | 16055874-HAA | 12.0 ppb |
2016-08-09 | 201608100621-HAA | 28.0 ppb |
2016-08-09 | 201608100624-HAA | 26.0 ppb |
2016-08-09 | 201608100626-HAA | 26.0 ppb |
2016-08-09 | 201608100620-HAA | 25.0 ppb |
2016-08-09 | 201608100627-HAA | 24.0 ppb |
2016-08-09 | 201608100618-HAA | 23.0 ppb |
2016-08-09 | 201608100622-HAA | 23.0 ppb |
2016-08-09 | 201608100623-HAA | 23.0 ppb |
2016-08-09 | 201608100619-HAA | 22.0 ppb |
2016-08-09 | 201608100625-HAA | 21.0 ppb |
2016-11-08 | 201611090354-HAA | 27.0 ppb |
2016-11-08 | 201611090358-HAA | 26.0 ppb |
2016-11-08 | 201611090359-HAA | 26.0 ppb |
2016-11-08 | 201611090360-HAA | 26.0 ppb |
2016-11-08 | 201611090361-HAA | 26.0 ppb |
2016-11-08 | 201611090363-HAA | 26.0 ppb |
2016-11-08 | 201611090356-HAA | 25.0 ppb |
2016-11-08 | 201611090357-HAA | 25.0 ppb |
2016-11-08 | 201611090362-HAA | 25.0 ppb |
2016-11-08 | 201611090355-HAA | 24.0 ppb |
2017-02-14 | 201702150976-HAA | 18.0 ppb |
2017-02-14 | 201702150978-HAA | 18.0 ppb |
2017-02-14 | 201702150977-HAA | 17.0 ppb |
2017-02-14 | 201702150973-HAA | 16.0 ppb |
2017-02-14 | 201702150975-HAA | 16.0 ppb |
2017-02-14 | 201702150979-HAA | 16.0 ppb |
2017-02-14 | 201702150980-HAA | 15.0 ppb |
2017-02-14 | 201702150981-HAA | 14.0 ppb |
2017-02-14 | 201702150972-HAA | 13.0 ppb |
2017-02-14 | 201702150974-HAA | 13.0 ppb |
2017-06-01 | 201706020333-HAA | 19.0 ppb |
2017-06-01 | 201706020340-HAA | 18.0 ppb |
2017-06-01 | 201706020331-HAA | 17.0 ppb |
2017-06-01 | 201706020334-HAA | 17.0 ppb |
2017-06-01 | 201706020336-HAA | 17.0 ppb |
2017-06-01 | 201706020337-HAA | 17.0 ppb |
2017-06-01 | 201706020339-HAA | 17.0 ppb |
2017-06-01 | 201706020335-HAA | 16.0 ppb |
2017-06-01 | 201706020332-HAA | 15.0 ppb |
2017-06-01 | 201706020338-HAA | 15.0 ppb |
2017-08-08 | 201708091350-HAA | 20.0 ppb |
2017-08-08 | 201708091343-HAA | 20.0 ppb |
2017-08-08 | 201708091341-HAA | 19.0 ppb |
2017-08-08 | 201708091349-HAA | 18.0 ppb |
2017-08-08 | 201708091344-HAA | 17.0 ppb |
2017-08-08 | 201708091345-HAA | 17.0 ppb |
2017-08-08 | 201708091347-HAA | 17.0 ppb |
2017-08-08 | 201708091346-HAA | 16.0 ppb |
2017-08-08 | 201708091348-HAA | 16.0 ppb |
2017-08-08 | 201708091342-HAA | 15.0 ppb |
2017-11-14 | 201711150375-HAA | 13.0 ppb |
2017-11-14 | 201711150382-HAA | 13.0 ppb |
2017-11-14 | 201711150373-HAA | 12.0 ppb |
2017-11-14 | 201711150376-HAA | 12.0 ppb |
2017-11-14 | 201711150381-HAA | 12.0 ppb |
2017-11-14 | 201711150377-HAA | 11.0 ppb |
2017-11-14 | 201711150378-HAA | 11.0 ppb |
2017-11-14 | 201711150379-HAA | 11.0 ppb |
2017-11-14 | 201711150380-HAA | 11.0 ppb |
2017-11-14 | 201711150374-HAA | 10.00 ppb |
2018-02-13 | 201802140952-HAA | 7.80 ppb |
2018-02-13 | 201802140953-HAA | 10.00 ppb |
2018-02-13 | 201802150882-HAA | 7.16 ppb |
2018-02-13 | 201802150883-HAA | 10.7 ppb |
2018-02-13 | 201802150884-HAA | 10.2 ppb |
2018-02-13 | 201802150885-HAA | 10.9 ppb |
2018-02-13 | 201802150886-HAA | 10.6 ppb |
2018-02-13 | 201802150887-HAA | 10.2 ppb |
2018-02-13 | 201802150888-HAA | 8.55 ppb |
2018-02-13 | 201802150889-HAA | 7.09 ppb |
2018-05-08 | 201805091224-HAA | 14.0 ppb |
2018-05-08 | 201805091225-HAA | 12.0 ppb |
2018-05-08 | 201805091296-HAA | 17.0 ppb |
2018-05-08 | 201805091297-HAA | 15.0 ppb |
2018-05-08 | 201805091298-HAA | 14.0 ppb |
2018-05-08 | 201805091299-HAA | 14.0 ppb |
2018-05-08 | 201805091300-HAA | 14.0 ppb |
2018-05-08 | 201805091301-HAA | 13.0 ppb |
2018-05-08 | 201805091302-HAA | 16.0 ppb |
2018-05-08 | 201805091303-HAA | 17.0 ppb |
2018-08-14 | 201808151345-HAA | 19.0 ppb |
2018-08-14 | 201808151346-HAA | 16.0 ppb |
2018-08-14 | 201808151347-HAA | 14.0 ppb |
2018-08-14 | 201808151348-HAA | 14.0 ppb |
2018-08-14 | 201808151349-HAA | 15.0 ppb |
2018-08-14 | 201808151350-HAA | 14.0 ppb |
2018-08-14 | 201808151352-HAA | 16.0 ppb |
2018-08-28 | 201808290793-HAA | 17.0 ppb |
2018-11-13 | 18115959-HAA | 13.0 ppb |
2018-11-13 | 18115960-HAA | 15.0 ppb |
2018-11-13 | 18115961-HAA | 14.0 ppb |
2018-11-13 | 18115962-HAA | 15.0 ppb |
2018-11-13 | 18115963-HAA | 15.0 ppb |
2018-11-13 | 18115964-HAA | 15.0 ppb |
2018-11-13 | 18115965-HAA | 15.0 ppb |
2018-11-13 | 18115966-HAA | 14.0 ppb |
2019-02-12 | 201902130459-HAA | 13.0 ppb |
2019-02-12 | 201902130460-HAA | 15.0 ppb |
2019-02-12 | 201902130461-HAA | 13.0 ppb |
2019-02-12 | 201902130462-HAA | 14.0 ppb |
2019-02-12 | 201902130463-HAA | 14.0 ppb |
2019-02-12 | 201902130464-HAA | 14.0 ppb |
2019-02-12 | 201902130465-HAA | 15.0 ppb |
2019-02-12 | 201902130466-HAA | 15.0 ppb |
2019-05-14 | 201905160187-HAA | 21.0 ppb |
2019-05-14 | 201905160188-HAA | 18.0 ppb |
2019-05-14 | 201905160189-HAA | 17.0 ppb |
2019-05-14 | 201905160190-HAA | 16.0 ppb |
2019-05-14 | 201905160191-HAA | 18.0 ppb |
2019-05-14 | 201905160192-HAA | 17.0 ppb |
2019-05-14 | 201905160193-HAA | 21.0 ppb |
2019-05-14 | 201905160194-HAA | 20.0 ppb |
2019-08-13 | 201908150825-HAA | 17.0 ppb |
2019-08-13 | 201908150826-HAA | 14.0 ppb |
2019-08-13 | 201908150827-HAA | 13.0 ppb |
2019-08-13 | 201908150828-HAA | 14.0 ppb |
2019-08-13 | 201908150829-HAA | 16.0 ppb |
2019-08-13 | 201908150830-HAA | 14.0 ppb |
2019-08-13 | 201908150831-HAA | 18.0 ppb |
2019-08-13 | 201908150832-HAA | 17.0 ppb |
2019-11-12 | 201911130669-HAA | 8.20 ppb |
2019-11-12 | 201911130670-HAA | 8.10 ppb |
2019-11-12 | 201911130671-HAA | 9.60 ppb |
2019-11-12 | 201911130672-HAA | 8.00 ppb |
2019-11-12 | 201911130673-HAA | 7.20 ppb |
2019-11-12 | 201911130674-HAA | 7.60 ppb |
2019-11-12 | 201911130675-HAA | 7.00 ppb |
2019-11-12 | 201911130676-HAA | 9.50 ppb |
2019-11-12 | 201911130677-HAA | 12.0 ppb |
2019-11-12 | 201911130678-HAA | 11.0 ppb |