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Gilpin County, Colorado: environmental and disease records

Cancer mortality in Gilpin County is 82.1 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 64 regulated facilities, sites and hazards inside the county, led by Industrial wastewater discharge (20), NPDES wastewater discharge permit (20), Rail grade crossing (8). 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: 39.8427, -105.5154.

How this county ranks in Colorado

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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.

Cancer rates for Gilpin County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
All cancer	New cases	332.4	453.4	0.73x	269.5 to 406.9	2019-2023
All cancer	Deaths	82.1	143.2	0.57x	55.6 to 120.1	2020-2024

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 Gilpin County
Measure	County	U.S. median	Difference	Unit
Premature death	6,624.7	9,842.6	-33%	years of life lost before age 75 per 100,000
Life expectancy	80	75.3	+6%	years
Child mortality	n/a	59.8	n/a	deaths under age 18 per 100,000
Infant mortality	n/a	6.2	n/a	deaths under age 1 per 1,000 live births
Injury deaths	82.3	96.9	-15%	deaths per 100,000
Drug overdose deaths	n/a	28.6	n/a	deaths 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.

Formaldehyde9.04 per million
Carbon Tetrachloride2.25 per million
Acetaldehyde0.74 per million
Pahpom0.69 per million

EPA Air Quality Index 2025

Monitored on 360 days: 273 good, 1 unhealthy for sensitive groups or worse. Median AQI 46, peak 101.

Regulated facilities, sites and hazards by type

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

Industrial wastewater discharge20
NPDES wastewater discharge permit20
Rail grade crossing8
Air permit holder (minor source)7
Auto repair or body shop (mapped facility)4
Gas station (mapped facility)2
EPA air quality monitor1
Public airport1
Brownfield property1

Highest-severity records

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

Black Hawk/Central City Sd Wwtf, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110020134442 (U.S. EPA ECHO) Agency record
Severity 5.5
E & W Portals Of Moffat Tunnel, Unk
NPDES wastewater discharge permit. Penalties $35,000.
EPA FRS registry ID 110024383086 (U.S. EPA ECHO) Agency record
Severity 5.3
Gilpin County School District Re-1, Blackhawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110005998046 (U.S. EPA ECHO) Agency record
Severity 4.5
Bates Hunter Mine, Central City
NPDES wastewater discharge permit.
EPA FRS registry ID 110006781143 (U.S. EPA ECHO) Agency record
Severity 4.5
Mmrr Quarry, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110070053500 (U.S. EPA ECHO) Agency record
Severity 4.5
Robert Fulton Reclamation, Gilpin County
NPDES wastewater discharge permit.
EPA FRS registry ID 110069419980 (U.S. EPA ECHO) Agency record
Severity 4.3
Reverends Ridge Campground Wwtf, Golden
NPDES wastewater discharge permit.
EPA FRS registry ID 110044239446 (U.S. EPA ECHO) Agency record
Severity 3.3
Belvidere Theatre, Central City
Brownfield property.
EPA FRS registry ID 110071975803 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Water Treatment Plant, Central City
NPDES wastewater discharge permit.
EPA FRS registry ID 110028272143 (U.S. EPA ECHO) Agency record
Severity 2.8
Young Ranch Resource Quarry, Central City
NPDES wastewater discharge permit.
EPA FRS registry ID 110071849349 (U.S. EPA ECHO) Agency record
Severity 2.8
Black Hawk/Central City Sd Wwtf, Gilpin County
Industrial wastewater discharge. Violation Identified.
NPDES permit CO0046761: (U.S. EPA NPDES)
Severity 2.3
Moffat Tunnel East Portal, Rollinsville
NPDES wastewater discharge permit.
EPA FRS registry ID 110069585121 (U.S. EPA ECHO) Agency record
Severity 2
Saratoga Casino Black Hawk, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110030994217 (U.S. EPA ECHO) Agency record
Severity 1.5
Black Hawk Central City Sanitation, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110055976289 (U.S. EPA ECHO) Agency record
Severity 1.5
Section 35 Fill Area, Uninc
NPDES wastewater discharge permit.
EPA FRS registry ID 110064736291 (U.S. EPA ECHO) Agency record
Severity 1.5
Black Hawk/Central Sanitation District, Blackhawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110070004165 (U.S. EPA ECHO) Agency record
Severity 1.5
Dirk Larsen Residence, Central City
NPDES wastewater discharge permit.
EPA FRS registry ID 110070389929 (U.S. EPA ECHO) Agency record
Severity 1.5
Young Ranch Resource, Central City
NPDES wastewater discharge permit.
EPA FRS registry ID 110071425540 (U.S. EPA ECHO) Agency record
Severity 1.5
Gilpin County School Sewer Interconnect, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110071783030 (U.S. EPA ECHO) Agency record
Severity 1.5
Mp 5 Storage Yard, Blackhawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110071878113 (U.S. EPA ECHO) Agency record
Severity 1.5
Reverends Ridge Campground, Black Hawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110071904221 (U.S. EPA ECHO) Agency record
Severity 1.5
Blackhawk Detention Pond Conversion, Blackhawk
NPDES wastewater discharge permit.
EPA FRS registry ID 110072002880 (U.S. EPA ECHO) Agency record
Severity 1.5
Beaver Creek Road, Pinecliffe
Rail grade crossing.
Record ID 253303H (Federal Railroad Administration)
Severity 1.3
Private, Rollinsville
Rail grade crossing.
Record ID 253307K (Federal Railroad Administration)
Severity 1.3
Private, Rollinsville
Rail grade crossing.
Record ID 253308S (Federal Railroad Administration)
Severity 1.3

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 Gilpin County

Colorado 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 Gilpin County, and their findings.
Colorado vital statistics office
Death certificate counts by cause of death and residence tract or ZIP code, and the years behind the mortality measures above.
Colorado health department, environmental epidemiology
Health consultations or assessments by ATSDR or the state health department covering the county, and any exposure investigations.
Colorado 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.
Colorado 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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