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Williams County, North Dakota: environmental and disease records

Cancer mortality in Williams County is 128.5 deaths per 100,000 people per year against a U.S. rate of 143.2. Federal databases place 413 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (148), Air permit holder (minor source) (107), Rail grade crossing (57). EPA AirToxScreen estimates a lifetime cancer risk from outdoor air toxics of 30 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: 48.2921, -103.4372.

How this county ranks in North Dakota

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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 Williams County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Lung & bronchus	Deaths	32.4	30.2	1.07x	23.6 to 43.3	2020-2024
Lung & bronchus	New cases	48.4	51.8	0.93x	37.6 to 61.1	2019-2023
Kidney & renal pelvis	New cases	16.5	17.9	0.92x	10.7 to 24.2	2019-2023
All cancer	Deaths	128.5	143.2	0.9x	111 to 147.9	2020-2024
Thyroid	New cases	10.5	13	0.81x	6.3 to 16.6	2019-2023
All cancer	New cases	355.9	453.4	0.78x	326.8 to 386.9	2019-2023
Leukemia	New cases	10.1	14.5	0.7x	5.9 to 16	2019-2023
Melanoma of the skin	New cases	13.2	23.8	0.55x	8.2 to 20.1	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 Williams County
Measure	County	U.S. median	Difference	Unit
Premature death	8,179.8	9,842.6	-17%	years of life lost before age 75 per 100,000
Life expectancy	77.9	75.3	+4%	years
Child mortality	53.2	59.8	-11%	deaths under age 18 per 100,000
Infant mortality	4	6.2	-35%	deaths under age 1 per 1,000 live births
Injury deaths	87.7	96.9	-10%	deaths per 100,000
Drug overdose deaths	17.3	28.6	-39%	deaths per 100,000

Air toxics and air quality

EPA AirToxScreen 2020

Lifetime cancer risk from outdoor air toxics: 30 in a million. EPA treats 100 in a million as the upper end of acceptable risk and 1 in a million as the goal.

Formaldehyde20.96 per million
Carbon Tetrachloride2.88 per million
Benzene2.34 per million
Acetaldehyde0.79 per million

EPA Air Quality Index

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

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit148
Air permit holder (minor source)107
Rail grade crossing57
Gas station (mapped facility)15
Scrapyard (mapped facility)13
Toxic chemical release facility (TRI)11
TRI reporting facility10
Hazardous waste transporter8
Landfill (mapped facility)8
Small hazardous waste generator7
Major air pollution source6
Public airport6
Large hazardous waste generator3
EPA air quality monitor2
Brownfield property2
Large greenhouse gas emitter2
Oil-fired power plant2
Wind power plant2
Wastewater plant (mapped facility)2
Commercial airport1
Gas 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.

Hess Tioga Gas Plant Llc, Tioga
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Methanol, Benzene, Xylene (mixed isomers) and 2 more. Reports carcinogens. 21,107 lbs released over 5 years.
TRI facility ID 5885WHSSTG13468 (U.S. EPA Toxics Release Inventory)
Severity 7.8
Stateline Complex, Williston
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Toluene, Benzene, Methanol and 1 more. Reports carcinogens. 15,336 lbs released over 5 years.
TRI facility ID 5880WSTTLN15715 (U.S. EPA Toxics Release Inventory)
Severity 7.7
Championx-Williston, Williston
Toxic chemical release facility (TRI). Chemicals: Methanol, Ethylene glycol, Ammonia, Certain glycol ethers and 4 more. Reports carcinogens. 11,059 lbs released over 5 years.
TRI facility ID 5880WNLCCM1466B (U.S. EPA Toxics Release Inventory)
Severity 7.6
Halliburton Williston Field Camp (Halwest), Williston
Toxic chemical release facility (TRI). Chemicals: Methanol, Lead And Lead Compounds, Toluene, n-Hexane and 3 more. Reports carcinogens. 10,611 lbs released over 5 years.
TRI facility ID 5880WHLLBR82648 (U.S. EPA Toxics Release Inventory)
Severity 7.6
Whiting Oil & Gas Corp Llc - Ray Gas Plant, Ray
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Methanol, Benzene, Ethylbenzene and 1 more. Reports carcinogens. 8,789 lbs released over 5 years.
TRI facility ID 5884WWHTNG11221 (U.S. EPA Toxics Release Inventory)
Severity 7.5
Crestwood Crude Logistics Lp, Epping
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Ethylbenzene, Benzene. Reports carcinogens. 5,844 lbs released over 5 years.
TRI facility ID 5884WCLTHB12324 (U.S. EPA Toxics Release Inventory)
Severity 7.4
Nesson Gas Plant, Tioga
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Benzene, Cyclohexane, Methanol and 1 more. Reports carcinogens. 3,508 lbs released over 5 years.
TRI facility ID 5885WNSSNG65919 (U.S. EPA Toxics Release Inventory)
Severity 7.2
Sabin Metal West Corp, Williston
TRI reporting facility.
EPA FRS registry ID 110009417586 (U.S. EPA ECHO) Agency record
Severity 6.6
Championx Llc - Williston, Williston
TRI reporting facility.
EPA FRS registry ID 110070491994 (U.S. EPA ECHO) Agency record
Severity 6.1
Hess Tioga Gas Plant Llc, Tioga
TRI reporting facility.
EPA FRS registry ID 110071716925 (U.S. EPA ECHO) Agency record
Severity 5.9
Stateline Complex, Williston
TRI reporting facility.
EPA FRS registry ID 110046491621 (U.S. EPA ECHO) Agency record
Severity 5.7
Whiting Oil And Gas Corporation, Llc - Ray Gas Plant, Ray
TRI reporting facility.
EPA FRS registry ID 110070157255 (U.S. EPA ECHO) Agency record
Severity 5.6
Halliburton Energy Services, Inc. - Halwest Facili, Williston
TRI reporting facility.
EPA FRS registry ID 110070566052 (U.S. EPA ECHO) Agency record
Severity 5.5
Norse Gas Plant, Mcgregor
TRI reporting facility.
EPA FRS registry ID 110070158539 (U.S. EPA ECHO) Agency record
Severity 5.5
Nesson Gas Plant, Tioga
TRI reporting facility.
EPA FRS registry ID 110041623918 (U.S. EPA ECHO) Agency record
Severity 5.4
Crestwood Crude Logistics Lp, Epping
TRI reporting facility.
EPA FRS registry ID 110060257699 (U.S. EPA ECHO) Agency record
Severity 5.4
Sabin Metal West Corp, Williston
Toxic chemical release facility (TRI). Chemicals: Mercury And Mercury Compounds, Lead And Lead Compounds, Lead compounds, Mercury compounds and 2 more. 426 lbs released over 5 years.
TRI facility ID 58802SBNMT1512T (U.S. EPA Toxics Release Inventory)
Severity 5
Williston Basin Intl, Williston
Commercial airport. O.
Record ID XWA (FAA / U.S. DOT)
Severity 5
Thomas Petroleum Llc - Williston North Bulk Plant, Williston
Toxic chemical release facility (TRI). Chemicals: Ethylene glycol, Polycyclic aromatic compounds, Toluene, 1,2,4-Trimethylbenzene and 4 more. Reports carcinogens.
TRI facility ID 5880WTHMSP4347T (U.S. EPA Toxics Release Inventory)
Severity 4.6
Williston City Of, Williston
NPDES wastewater discharge permit.
EPA FRS registry ID 110040042557 (U.S. EPA ECHO) Agency record
Severity 4.5
Halliburton Williston Baroid, Williston
Toxic chemical release facility (TRI). Chemicals: n-Hexane, Nonylphenol Ethoxylates, Lead And Lead Compounds, Certain glycol ethers and 3 more. Reports carcinogens.
TRI facility ID 5880WHLLBR36AVE (U.S. EPA Toxics Release Inventory)
Severity 4.5
Wellbore Integrity Solutions (Wis), Williston
NPDES wastewater discharge permit.
EPA FRS registry ID 110062920816 (U.S. EPA ECHO) Agency record
Severity 4.3
Meadowlark Midstream Company, Llc, Athens Township
NPDES wastewater discharge permit. Penalties $20,000,000.
EPA FRS registry ID 110064097677 (U.S. EPA ECHO) Agency record
Severity 4.3
Clearshift, Llc, Tioga
NPDES wastewater discharge permit.
EPA FRS registry ID 110070822595 (U.S. EPA ECHO) Agency record
Severity 4.3
Portable Generator 2, Ray
Oil-fired power plant.
Record ID 59194 (U.S. Energy Information Administration)
Severity 4

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 Williams County

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