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Laramie County, Wyoming: environmental and disease records

Cancer mortality in Laramie County is 157.7 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. Federal databases place 534 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (137), Rail grade crossing (120), Gas station (mapped facility) (58). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 20 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: 41.3259, -104.6666.

How this county ranks in Wyoming

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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 Laramie County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Melanoma of the skin	Deaths	3.1	2	1.55x	1.8 to 4.9	2020-2024
Melanoma of the skin	New cases	31.9	23.8	1.34xSignificant	27.4 to 36.9	2019-2023
Leukemia	Deaths	7.6	5.7	1.33x	5.5 to 10.2	2020-2024
Non-Hodgkin lymphoma	Deaths	6.2	4.8	1.29x	4.3 to 8.6	2020-2024
Leukemia	New cases	17.2	14.5	1.19x	13.9 to 21	2019-2023
Kidney & renal pelvis	Deaths	4	3.4	1.18x	2.6 to 6.1	2020-2024
Brain & nervous system	Deaths	5.1	4.4	1.16x	3.4 to 7.4	2020-2024
Bladder	New cases	21.1	18.7	1.13x	17.7 to 25.1	2019-2023
All cancer	Deaths	157.7	143.2	1.1xSignificant	147.8 to 168	2020-2024
Non-Hodgkin lymphoma	New cases	19.7	18.5	1.06x	16.2 to 23.6	2019-2023
Lung & bronchus	Deaths	31.4	30.2	1.04x	27.1 to 36.2	2020-2024
All cancer	New cases	463	453.4	1.02x	445.7 to 480.8	2019-2023
Esophagus	Deaths	3.7	3.7	1x	2.4 to 5.6	2020-2024
Esophagus	New cases	4.6	4.6	1x	3.1 to 6.7	2019-2023
Liver & bile duct	Deaths	6.6	6.6	1x	4.8 to 9	2020-2024
Pancreas	Deaths	11.1	11.3	0.98x	8.6 to 14.1	2020-2024
Thyroid	New cases	12.7	13	0.98x	9.6 to 16.3	2019-2023
Pancreas	New cases	13	13.9	0.94x	10.3 to 16.3	2019-2023
Kidney & renal pelvis	New cases	16.3	17.9	0.91x	13.1 to 19.9	2019-2023
Brain & nervous system	New cases	5.6	6.2	0.9x	3.8 to 8.1	2019-2023
Lung & bronchus	New cases	44.7	51.8	0.86x	39.6 to 50.4	2019-2023
Liver & bile duct	New cases	7.5	8.7	0.86x	5.6 to 9.9	2019-2023
Bladder	Deaths	3.4	4.1	0.83x	2.1 to 5.2	2020-2024
Stomach	New cases	5.1	6.6	0.77x	3.5 to 7.3	2019-2023

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 Laramie County
Measure	County	U.S. median	Difference	Unit
Premature death	8,712.5	9,842.6	-11%	years of life lost before age 75 per 100,000
Life expectancy	76	75.3	+1%	years
Child mortality	59	59.8	-1%	deaths under age 18 per 100,000
Infant mortality	6.1	6.2	-1%	deaths under age 1 per 1,000 live births
Injury deaths	90.3	96.9	-7%	deaths per 100,000
Drug overdose deaths	22.5	28.6	-21%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 20 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde11.47 per million
Carbon Tetrachloride2.46 per million
Naphthalene1.27 per million
Acetaldehyde1.01 per million

EPA Air Quality Index 2025

Monitored on 365 days: 274 good, 1 unhealthy for sensitive groups or worse. Median AQI 45, peak 108.

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit137
Rail grade crossing120
Gas station (mapped facility)58
Brownfield property56
Air permit holder (minor source)42
Small hazardous waste generator28
Auto repair or body shop (mapped facility)19
Hazardous waste transporter15
TRI reporting facility9
Toxic chemical release facility (TRI)9
Major air pollution source7
Public airport6
Large greenhouse gas emitter5
Large hazardous waste generator5
Wind power plant4
Scrapyard (mapped facility)4
EPA air quality monitor2
Landfill (mapped facility)2
Wastewater plant (mapped facility)2
Commercial airport1
Heliport1
Gas power plant1
Superfund (NPL) site1

Highest-severity records

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

F.E. Warren Air Force Base, Cheyenne
Superfund (NPL) site. Hazard Ranking System score 39.2. NPL Site.
EPA site ID WY5571924179 (U.S. EPA Superfund (SEMS/NPL)) Agency record
Severity 10
Dyno Nobel Inc-Cheyenne Plant, Cheyenne
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia, Ethylene glycol, Formaldehyde and 3 more. Reports carcinogens. 27,490,361 lbs released over 5 years.
TRI facility ID 82007DYNNB835TT (U.S. EPA Toxics Release Inventory)
Severity 10
Dyno Nobel Inc-Cheyenne Plant, Cheyenne
TRI reporting facility. Penalties $415,258.
EPA FRS registry ID 110000468066 (U.S. EPA ECHO) Agency record
Severity 9
Cheyenne Renewable Diesel Co Llc, Cheyenne
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Hydrogen sulfide, Xylene (mixed isomers), Toluene and 4 more. Reports carcinogens. 80,485 lbs released over 5 years.
TRI facility ID 82007FRNTR2700E (U.S. EPA Toxics Release Inventory)
Severity 8.3
Knife River Cheyenne, Cheyenne
Toxic chemical release facility (TRI). Chemicals: Nitrate compounds (water dissociable; reportable only when in aqueous solution), Polycyclic aromatic compounds, Lead compounds, Lead And Lead Compounds and 2 more. Reports carcinogens. 623 lbs released over 5 years.
TRI facility ID 82007KNFRV4875S (U.S. EPA Toxics Release Inventory)
Severity 6.6
U.S. Dod Usaf Wyoming Ang, Cheyenne
Toxic chemical release facility (TRI). Chemicals: Toluene, Xylene (mixed isomers), Naphthalene, Ethylbenzene and 1 more. Reports carcinogens. 44 lbs released over 5 years.
TRI facility ID 82009SRFRC217DE (U.S. EPA Toxics Release Inventory)
Severity 5.8
Brenntag Pacific Inc., Cheyenne
Toxic chemical release facility (TRI). Chemicals: Methanol, Ethylene glycol. 3,618 lbs released over 5 years.
TRI facility ID 8200WBRNNT6527B (U.S. EPA Toxics Release Inventory)
Severity 5.7
Dyno Nobel Inc-Cheyenne Plant, Cheyenne
Major air pollution source. Penalties $415,258.
EPA FRS registry ID 110000468066 (U.S. EPA ECHO) Agency record
Severity 5.5
Cheyenne Renewable Diesel Company, Cheyenne
TRI reporting facility.
EPA FRS registry ID 110000468048 (U.S. EPA ECHO) Agency record
Severity 5.4
Brenntag Pacific, Llc., Cheyenne
TRI reporting facility.
EPA FRS registry ID 110064677933 (U.S. EPA ECHO) Agency record
Severity 5.3
Dyno Nobel Inc-Cheyenne Plant, Cheyenne
NPDES wastewater discharge permit. Penalties $415,258.
EPA FRS registry ID 110000468066 (U.S. EPA ECHO) Agency record
Severity 5
Tri-State Oil Reclaimers, Cheyenne
Hazardous waste transporter. Penalties $55,801.
EPA FRS registry ID 110005580193 (U.S. EPA ECHO) Agency record
Severity 5
Medicine Bow River Ranch Pit (Lqd Et1683), Albin
NPDES wastewater discharge permit.
EPA FRS registry ID 110041410960 (U.S. EPA ECHO) Agency record
Severity 5
Cheyenne Rgnl/Jerry Olson Fld, Cheyenne
Commercial airport. O.
Record ID CYS (FAA / U.S. DOT)
Severity 5
Knife River Cheyenne, Cheyenne
TRI reporting facility.
EPA FRS registry ID 110037148164 (U.S. EPA ECHO) Agency record
Severity 5
Us Dod Usaf Fe Warren Afb (Part), Fe Warren Afb
Toxic chemical release facility (TRI). Chemicals: Lead. Reports carcinogens. 1 lbs released over 5 years.
TRI facility ID 82005SRFRC300VE (U.S. EPA Toxics Release Inventory)
Severity 4.7
Vae Nortrak Cheyenne Inc/North America Inc, Cheyenne
TRI reporting facility.
EPA FRS registry ID 110028071191 (U.S. EPA ECHO) Agency record
Severity 4.5
Dyno Nobel Inc-Cheyenne Plant, Cheyenne
Large greenhouse gas emitter. Penalties $415,258.
EPA FRS registry ID 110000468066 (U.S. EPA ECHO) Agency record
Severity 4.5
Granite Canyon Quarry (Lqd Pt0244), Granite Canyon
NPDES wastewater discharge permit.
EPA FRS registry ID 110055167796 (U.S. EPA ECHO) Agency record
Severity 4.5
Cys13 Data Center, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055174680 (U.S. EPA ECHO) Agency record
Severity 4.5
Crafco Inc. - Cheyenne, Cheyenne
Toxic chemical release facility (TRI). Chemicals: Benzo[g,h,i]perylene, Polycyclic aromatic compounds. Reports carcinogens.
TRI facility ID 8200WCRFCN325RA (U.S. EPA Toxics Release Inventory)
Severity 4.5
Ergon Asphalt & Emulsions Inc. - Cheyenne, Cheyenne
Toxic chemical release facility (TRI). Chemicals: Benzo[g,h,i]perylene, Lead, Polycyclic aromatic compounds. Reports carcinogens.
TRI facility ID 8200WMNTNS4511S (U.S. EPA Toxics Release Inventory)
Severity 4.5
Voestalpine Railway Systems Nortrak Inc., Cheyenne
Toxic chemical release facility (TRI). Chemicals: Manganese. 73 lbs released over 5 years.
TRI facility ID 8200WVNRTR174PA (U.S. EPA Toxics Release Inventory)
Severity 4.4
Ruben'S Metals, Cheyenne
NPDES wastewater discharge permit.
EPA FRS registry ID 110043573727 (U.S. EPA ECHO) Agency record
Severity 4.3
Lccc Student Services Center, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110064617767 (U.S. EPA ECHO) Agency record
Severity 4.3

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 Laramie County

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