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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Dibenzofuran


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Dibenzofuran is a pollutant released from coke oven dust, grate ash, fly ash and flame soot.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
1
-
-
People Served
6,699
-
-

Health Concerns for Dibenzofuran:


Dibenzofuran Exposure by State

Water utilities in 1 states have reported detecting Dibenzofuran in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Dibenzofuran contamination
SystemsPopulation
Delaware16,699
Total16,699

The Most Polluted Communities

1 water utilities reported detecting Dibenzofuran in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dibenzofuran level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Seaford Water Department
Seaford, DE
6,6992 of 40.03 ppb
(0 to 0.05 ppb)

Testing Summary for Dibenzofuran

Are tests routinely required for Dibenzofuran by federal law?No
Water suppliers reporting tests for Dibenzofuran (2004-2007):115 of 47,576
Average testing rate for water supplier reporting tests (2004-2007):1.0 per year

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Known human respiratory toxicant EPA Hazardous Air Pollutants
One or more animal studies show classified as toxic effects at moderate doses (low dose studies may be unavailable for this ingredient) EPA Toxic Release Inventory PBTs
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List

Persistence and bioaccumulation

Type of concern: Reference:
Persistent, bioaccumulative in wildlife EPA PBTs - Waste Minimization Program (RCRA)
Not suspected to be bioaccumulative Environment Canada Domestic Substance List

Cancer

Type of concern: Reference:
Cancer - not classifiable/not likely to be human carcinogen EPA Integrated Risk Information System (IRIS)
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Environmental and Molecular Mutagenesis 1987

Ecotoxicology

Type of concern: Reference:
Not suspected to be an environmental toxin Environment Canada Domestic Substance List



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
EPA Hazardous Air PollutantsDIBENZOFURANS•Hazardous air pollutant under Clean Air Act
EPA Toxic Release Inventory PBTsDIBENZOFURAN•Toxic, U.S. Environmental Protection Agency Toxics Release Inventory programs
EPA PBTs - Waste Minimization Program (RCRA)DIBENZOFURAN•Persistent, bioaccumulative toxicant - Resource Conservation and Recovery Act, priority chemical for voluntary waste/emission reductions
EPA Integrated Risk Information System (IRIS)DIBENZOFURAN•Group D: Not classifiable as to human carcinogenicity (EPA classification)
Environment Canada Domestic Substance ListDIBENZOFURAN•This chemical was NOT flagged by CEPA for further attention. The chemical was flagged for suspected persistence.
RTECS®- Environmental and Molecular Mutagenesis 1987DIBENZOFURAN• mutagenic - Positive mutation assay: Sister Chromatid Exchange (hamster ovr)



references

government/industry list/academic study reference
EPA Hazardous Air PollutantsEPA (U.S. Environmental Protection Agency). 2005. Office of Air. The 112(b)1 Hazardous Air Pollutants List (as modified). Last modified: 12 Dec 2005.
EPA Toxic Release Inventory PBTsEPA (U.S. Environmental Protection Agency). 1999. Toxics Release Inventory Program. PBT Chemical Rule.
EPA PBTs - Waste Minimization Program (RCRA)EPA (U.S. Environmental Protection Agency). 1998. Resource Conservatin and Recovery Act (RCRA) Waste Minimization Program - priority chemicals for elimination or reduction.
EPA Integrated Risk Information System (IRIS)EPA (U.S. Environmental Protection Agency). 2008. Integrated Risk Information System (IRIS). Evidence for human carcinogenicity based on 1986-2005 guidelines.
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
RTECS®- Environmental and Molecular Mutagenesis 1987RTECS®- Environmental and Molecular Mutagenesis. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY 10003) V.10- 10(Suppl 10),1,1987

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