Know Your Environment. Protect Your Health.

o-Dichlorobenzene

Harris County Fresh Water Supply District 1a

NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for o-dichlorobenzene. Sample information shown below was taken by Baytown Area Water Authority.

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
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: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for o-dichlorobenzene. Sample information shown below was taken by Baytown Area Water Authority.

Date Lab ID Result
2018-08-03AE35860ND
2019-09-06AE82509ND
2020-07-14AF19344ND
2021-08-09AF65379ND
2021-10-20AF74188ND
2022-01-12AF80002ND
2022-04-04AF91855ND
2022-07-05AG03267ND
2022-07-05AG03269ND
2023-01-12AG24428ND
2023-07-11AG47888ND