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Hexachlorobenzene (HCB)

Status: National drinking water standard exists

 

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.

2015:

FOUND
FOUND ABOVE HEALTH GUIDELINES

1

states detected

8

utilities detected

65,994

people served

0

states over health guideline

0

utilities over health guideline

0

people served over health guideline

Health concerns for hexachlorobenzene

Cancer

Harm to the brain and nervous system

Hormone disruption

State and national drinking water standards and health guidelines

Health Guideline 0.03 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 1 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting hexachlorobenzene in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Colorado865,994
MORE
LESS

Utilities with the highest amounts of hexachlorobenzene, 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Peetz, Town ofPeetz, CO1 of 10.0130 ppb295
Town of BreckenridgeBreckenridge, CO1 of 10.00970 ppb36,258
Redstone Water & Sanitation DistrictSnowmass, CO1 of 10.00610 ppb180
Yuma, City ofYuma, CO2 of 40.00343 ppb4,049
Town of Estes Park*Estes Park, CO1 of 40.00245 ppb16,022
Mountain Village, Town ofTelluride, CO1 of 60.000867 ppb8,700

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Hexachlorobenzene (HCB), but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Town of BreckenridgeBreckenridge, CO1 of 10.00970 ppb36,258
Town of Estes Park*Estes Park, CO1 of 40.00245 ppb16,022

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Hexachlorobenzene (HCB), but it likely has the contaminant in its water supply.