Know Your Environment. Protect Your Health.

Hexachlorobenzene (HCB)

City of Richland Hills

NOTE: City of Richland Hills purchases water from City of Fort Worth which is required to test for hexachlorobenzene (hcb). Sample information shown below was taken by City of Fort Worth.

Hexachlorobenzene is a cancer-causing, neurotoxic and hormone-disrupting chemical used as a pesticide until 1984. It is still found in landfills and hazardous waste sites, and can be detected in people.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.03 ppb

The EWG Health Guideline of 0.03 ppb for hexachlorobenzene 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 cancer.

EPA Maximum Contaminant
Level (MCL): 1 ppb

The legal limit for hexachlorobenzene, established in 1992, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to hexachlorobenzene exposure.

ppb = parts per billion

All test results

NOTE: City of Richland Hills purchases water from City of Fort Worth which is required to test for hexachlorobenzene (hcb). Sample information shown below was taken by City of Fort Worth.

Date Lab ID Result
2018-01-24Q1802705006ND
2018-01-24Q1802705007ND
2018-01-24Q1802705005ND
2018-03-20Q1811001002ND
2018-03-20Q1811001006ND
2019-01-23Q1903345004ND
2019-04-24Q1916570021ND
2019-05-22Q1927658003ND
2019-05-22Q1927658010ND
2019-06-17Q1936867002ND
2019-07-24Q1947967024ND
2019-10-23Q1973436019ND
2020-01-22Q2002459003ND
2020-01-22Q2002459029ND
2020-04-22Q2016071001ND
2020-04-22Q2016071002ND
2021-01-20Q2101402001ND
2021-01-20Q2101402002ND
2021-01-20Q2101402007ND
2021-04-21Q2110318001ND
2022-01-19Q2201985001ND
2022-05-19Q2214821001ND
2022-05-19Q2214821002ND
2023-01-04Q2300420005ND
2023-03-21Q2310673006ND
2023-03-21Q2310673007ND
2023-03-21Q2310673008ND
2023-03-21Q2310673018ND