Know Your Environment. Protect Your Health.

o-Dichlorobenzene

City of Tualatin

NOTE: City of Tualatin purchases water from Portland Water Bureau which is required to test for o-dichlorobenzene. Sample information shown below was taken by Portland Water Bureau.

o-Dichlorobenzene is used as a chemical intermediate for making agricultural herbicides. It is toxic to the liver, kidneys and the nervous system, and causes cancer in animal studies.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND20ND
2022ND20ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 600 ppb

The EWG Health Guideline of 600 ppb for o-dichlorobenzene was defined 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. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL): 600 ppb

The legal limit for o-dichlorobenzene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1970s.

ppb = parts per billion

All test results

NOTE: City of Tualatin purchases water from Portland Water Bureau which is required to test for o-dichlorobenzene. Sample information shown below was taken by Portland Water Bureau.

Date Lab ID Result
2018-03-15BC03118-VND
2018-04-03BC04117-VND
2019-04-02BC21049-VND
2019-07-15BC25289-VND
2020-05-12BC38533-VND
2020-08-06BC41702ND
2021-04-06BC53668-VND
2021-08-04BC60213-VND
2022-04-05BC75262-VND
2022-08-03BC85642-VND
2023-04-04BC96020-VND
2023-08-29BD02264-VND