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Platte County, Wyoming: environmental and disease records

Cancer mortality in Platte County is 146.7 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 159 regulated facilities, sites and hazards inside the county, led by Rail grade crossing (71), NPDES wastewater discharge permit (38), Air permit holder (minor source) (13). 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: 42.1571, -104.9677.

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 Platte County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Melanoma of the skin	New cases	37.9	23.8	1.59x	23.1 to 59.6	2019-2023
Bladder	New cases	23.9	18.7	1.28x	14 to 40.1	2019-2023
All cancer	Deaths	146.7	143.2	1.02x	121.5 to 177.3	2020-2024
All cancer	New cases	397.6	453.4	0.88x	352.4 to 448.3	2019-2023
Lung & bronchus	Deaths	22.8	30.2	0.75x	13.4 to 38.3	2020-2024
Lung & bronchus	New cases	35.9	51.8	0.69x	24 to 53.8	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 Platte County
Measure	County	U.S. median	Difference	Unit
Premature death	10,706.1	9,842.6	+9%	years of life lost before age 75 per 100,000
Life expectancy	75.1	75.3	-0%	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	123.6	96.9	+27%	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: 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.

Formaldehyde9.95 per million
Carbon Tetrachloride2.57 per million
Acetaldehyde0.7 per million
Pahpom0.61 per million

EPA Air Quality Index 2025

Monitored on 361 days: 327 good, 12 unhealthy for sensitive groups or worse. Median AQI 15, peak 723.

Regulated facilities, sites and hazards by type

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

Rail grade crossing71
NPDES wastewater discharge permit38
Air permit holder (minor source)13
Gas station (mapped facility)12
Small hazardous waste generator5
Public airport3
Major air pollution source2
Commercial airport2
Hazardous waste transporter2
Hydroelectric plant2
TRI reporting facility2
Toxic chemical release facility (TRI)2
EPA air quality monitor1
Auto repair or body shop (mapped facility)1
Brownfield property1
Large hazardous waste generator1
Coal power plant1

Highest-severity records

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

Basin Electric Power Cooperative - Laramie River Station, Wheatland
TRI reporting facility. Penalties $45,000.
EPA FRS registry ID 110000468075 (U.S. EPA ECHO) Agency record
Severity 10
Basin Electric Laramie River Station, Wheatland
Toxic chemical release facility (TRI). Chemicals: Barium And Barium Compounds, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Manganese And Manganese Compounds, Nickel And Nickel Compounds and 4 more. Reports carcinogens. 12,498,749 lbs released over 5 years.
TRI facility ID 82201LRMRV347GR (U.S. EPA Toxics Release Inventory)
Severity 9.9
Us Army Camp Guernsey Training Areas, Guernsey
Toxic chemical release facility (TRI). Chemicals: Copper, Lead. Reports carcinogens. 162,839 lbs released over 5 years.
TRI facility ID 82214SRMYCFREMN (U.S. EPA Toxics Release Inventory)
Severity 8.5
Laramie River Station, Wheatland
Coal power plant.
Record ID 6204 (U.S. Energy Information Administration)
Severity 7.7
Basin Electric Power Cooperative - Laramie River Station, Wheatland
Major air pollution source. Penalties $45,000.
EPA FRS registry ID 110000468075 (U.S. EPA ECHO) Agency record
Severity 6.8
U.S. Army Camp Guernsey Training Areas, Guernsey
TRI reporting facility.
EPA FRS registry ID 110020516020 (U.S. EPA ECHO) Agency record
Severity 6
Collins Pit (Lqd Sp0833), Glendo
NPDES wastewater discharge permit.
EPA FRS registry ID 110055204210 (U.S. EPA ECHO) Agency record
Severity 4.5
Amvc Wyoming Site 40, Wheatland
NPDES wastewater discharge permit.
EPA FRS registry ID 110064627355 (U.S. EPA ECHO) Agency record
Severity 4.3
Tank 888 Api 653 Cir, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110070049032 (U.S. EPA ECHO) Agency record
Severity 4.3
Guernsey Compressor Station (Tallgrass Interstate Gas Transmission), Platte County
Major air pollution source.
EPA FRS registry ID 110007346988 (U.S. EPA ECHO) Agency record
Severity 3.5
Hiland Express Pr6 Meter Station, (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110071781455 (U.S. EPA ECHO) Agency record
Severity 3.3
Town Of Wheatland Antelope Gap Road Steinhausen Parcel, Wheatland
Brownfield property.
EPA FRS registry ID 110071978679 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Guernsey South Terminal, Guernsey
Large hazardous waste generator.
EPA FRS registry ID x00b1c0a5577288eecc0e832df4f75214 (U.S. EPA ECHO) Agency record
Severity 3
Wyoming Army National Guard-Wyarng- Camp Guernsey, Guernsey, Wyoming, Guernsey
Small hazardous waste generator.
EPA FRS registry ID 110070648401 (U.S. EPA ECHO) Agency record
Severity 2.8
Thomas Meml, Glendo
Public airport. O.
Record ID 76V (FAA / U.S. DOT)
Severity 2
Phifer Airfield, Wheatland
Commercial airport. O.
Record ID EAN (FAA / U.S. DOT)
Severity 2
Camp Guernsey, Guernsey
Commercial airport. O.
Record ID GUR (FAA / U.S. DOT)
Severity 2
Guernsey Wastewater Lagoon, Guernsey
NPDES wastewater discharge permit.
EPA FRS registry ID 110055197629 (U.S. EPA ECHO) Agency record
Severity 1.8
Collins Limestone Quarry, Glendo
NPDES wastewater discharge permit.
EPA FRS registry ID 110055163665 (U.S. EPA ECHO) Agency record
Severity 1.5
Stevenson Cattle Co. (Aka Double S Livestock Feedlot), Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055164209 (U.S. EPA ECHO) Agency record
Severity 1.5
Camp Guernsey Troop Labor Construction Projects (Field Permit), Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055165208 (U.S. EPA ECHO) Agency record
Severity 1.5
Gray Quarry, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055167910 (U.S. EPA ECHO) Agency record
Severity 1.5
Wheatland Redi-Mix Plant & Jones Pit, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055168795 (U.S. EPA ECHO) Agency record
Severity 1.5
Alexander Construction Pit (Lqd Sp0749, Aka Fish Creek Quarry), (Unknown City)
NPDES wastewater discharge permit.
EPA FRS registry ID 110055169222 (U.S. EPA ECHO) Agency record
Severity 1.5
Wheatland Feedlot, Unknown
NPDES wastewater discharge permit.
EPA FRS registry ID 110055169339 (U.S. EPA ECHO) Agency record
Severity 1.5

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 Platte 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 Platte 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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