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Clark County, Idaho: environmental and disease records

County cancer statistics are not published for Clark County. Federal databases place 57 regulated facilities, sites and hazards inside the county, led by Industrial wastewater discharge (31), Rail grade crossing (17), NPDES wastewater discharge permit (3). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 10 in a million, driven mainly by formaldehyde.

Rates are age-adjusted per 100,000 people. A cancer signal is marked significant when the lower bound of its 95 percent confidence interval is above the U.S. rate. Facility counts use active federal records located inside the county boundary. Approximate county center: 44.2756, -112.3331.

How this county ranks in Idaho

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Cancer deaths and new cases versus the United States

Source: NCI and CDC State Cancer Profiles, both sexes, all ages. Sorted by the ratio of the county rate to the U.S. rate.

No county-level cancer statistics are published for this area. Request counts directly from the Idaho state cancer registry.

Mortality measures versus the U.S. county median

Source: County Health Rankings, built from CDC National Vital Statistics System death records. The comparison value is the median of all U.S. counties.

Mortality measures for Clark County
MeasureCountyU.S. medianDifferenceUnit
Premature deathn/a9,842.6n/ayears of life lost before age 75 per 100,000
Life expectancyn/a75.3n/ayears
Child mortalityn/a59.8n/adeaths under age 18 per 100,000
Infant mortalityn/a6.2n/adeaths under age 1 per 1,000 live births
Injury deathsn/a96.9n/adeaths per 100,000
Drug overdose deathsn/a28.6n/adeaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 10 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

  • Formaldehyde8.82 per million
  • Carbon Tetrachloride2.56 per million
  • Acetaldehyde0.85 per million
  • Pahpom0.66 per million

EPA Air Quality Index

No EPA air quality monitor reports daily AQI for this county.

Regulated facilities, sites and hazards by type

57 active records inside the county from EPA ECHO, TRI, Superfund, Brownfields, NPDES, EIA, FAA, FRA and corrections data.

  • Industrial wastewater discharge31
  • Rail grade crossing17
  • NPDES wastewater discharge permit3
  • Gas station (mapped facility)2
  • Hydroelectric plant2
  • Air permit holder (minor source)1
  • Public airport1

Highest-severity records

The 25 records with the highest Envyrofax severity in the county, with the agency identifier to cite in a records request.

  1. Centennial Mine, Spencer

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110007263200 (U.S. EPA ECHO) Agency record

    Severity 3.3

  2. Dubois Muni, Dubois

    Public airport. O.

    Record ID U41 (FAA / U.S. DOT)

    Severity 2

  3. Kilgore Project, Kilgore

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110071358396 (U.S. EPA ECHO) Agency record

    Severity 1.5

  4. Yale-Kilgore Road, Argora

    NPDES wastewater discharge permit.

    EPA FRS registry ID 110071445161 (U.S. EPA ECHO) Agency record

    Severity 1.5

  5. Private, Spencer

    Rail grade crossing.

    Record ID 812338D (Federal Railroad Administration)

    Severity 1.1

  6. Private, Dubois

    Rail grade crossing.

    Record ID 812383X (Federal Railroad Administration)

    Severity 1.1

  7. Private, Dubois

    Rail grade crossing.

    Record ID 812384E (Federal Railroad Administration)

    Severity 1.1

  8. Laird Rock Road, Dubois

    Rail grade crossing.

    Record ID 812385L (Federal Railroad Administration)

    Severity 1.1

  9. Fifth Street/ Cemetery Road, Dubois

    Rail grade crossing.

    Record ID 812386T (Federal Railroad Administration)

    Severity 1.1

  10. Second South/ Lost Gold Trails Loop, Dubois

    Rail grade crossing.

    Record ID 812387A (Federal Railroad Administration)

    Severity 1.1

  11. Approx First North, Dubois

    Rail grade crossing.

    Record ID 812388G (Federal Railroad Administration)

    Severity 1.1

  12. Modoc Road, Dubois

    Rail grade crossing.

    Record ID 812389N (Federal Railroad Administration)

    Severity 1.1

  13. Idmon Road, Spencer

    Rail grade crossing.

    Record ID 812390H (Federal Railroad Administration)

    Severity 1.1

  14. Lost Gold Trail Loop, Spencer

    Rail grade crossing.

    Record ID 812493H (Federal Railroad Administration)

    Severity 1.1

  15. West Camas-Miners Creek Road, Spencer

    Rail grade crossing.

    Record ID 812494P (Federal Railroad Administration)

    Severity 1.1

  16. Private, Spencer

    Rail grade crossing.

    Record ID 812495W (Federal Railroad Administration)

    Severity 1.1

  17. Private, Spencer

    Rail grade crossing.

    Record ID 812496D (Federal Railroad Administration)

    Severity 1.1

  18. Private, Spencer

    Rail grade crossing.

    Record ID 812497K (Federal Railroad Administration)

    Severity 1.1

  19. Private, Spencer

    Rail grade crossing.

    Record ID 812498S (Federal Railroad Administration)

    Severity 1.1

  20. Private, Spencer

    Rail grade crossing.

    Record ID 812499Y (Federal Railroad Administration)

    Severity 1.1

  21. Private, Spencer

    Rail grade crossing.

    Record ID 812500R (Federal Railroad Administration)

    Severity 1.1

  22. Thermocal Mines Of Idaho Llc 00316, Dubois

    Air permit holder (minor source).

    EPA FRS registry ID 110040493329 (U.S. EPA ECHO) Agency record

    Severity 1

  23. Fuel Station

    Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.

    Record ID way/1127928269 (OpenStreetMap contributors) Agency record

    Severity 1

  24. Sinclair, Dubois

    Gas station (mapped facility). Mapped facility presence only; no compliance or exposure measurements.

    Record ID way/706754916 (OpenStreetMap contributors) Agency record

    Severity 1

  25. Centennial Mine, Island Park

    Industrial wastewater discharge. Violation Identified.

    NPDES permit IDR053104:003 (U.S. EPA NPDES)

    Severity 1

Correctional facilities

Prisons, jails and corrections operations with an EPA facility record, and the drinking water and wastewater compliance attached to them.

No correctional facility with an EPA record is located in this county.

Discovery / public records

Records to request for Clark County

  • Idaho state cancer registry

    Cancer incidence counts by census tract or ZIP code, by cancer type and year (de-identified). Any cancer cluster inquiries or investigations in Clark County, and their findings.

  • Idaho vital statistics office

    Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.

  • Idaho health department, environmental epidemiology

    Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.

  • Idaho environmental agency and the U.S. EPA regional office

    Compliance history, inspection reports, notices of violation, penalties and enforcement actions for each facility above, cited by EPA FRS registry ID.

  • Idaho drinking water program

    Violation notices, sampling results and sanitary surveys for the public water systems serving the county, including any system serving a correctional facility.

  • Department of corrections or county sheriff

    Water testing, grievances and environmental health inspections for the correctional facilities listed above.

Each Envyrofax address report includes a printable records request worksheet with the custodian and the exact request wording per finding.

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