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La Paz County, Arizona: environmental and disease records

Cancer mortality in La Paz County is 169.6 deaths per 100,000 people per year against a U.S. rate of 143.2, a statistically significant excess. Federal databases place 168 regulated facilities, sites and hazards inside the county, led by Gas station (mapped facility) (38), Industrial wastewater discharge (32), Rail grade crossing (29). 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: 33.6724, -113.9334.

How this county ranks in Arizona

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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 La Paz County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Kidney & renal pelvis	New cases	25.7	17.9	1.44x	16.8 to 38.6	2019-2023
Melanoma of the skin	New cases	33.6	23.8	1.41x	23.6 to 47.3	2019-2023
Lung & bronchus	Deaths	36.2	30.2	1.2x	27.7 to 47.7	2020-2024
All cancer	Deaths	169.6	143.2	1.18xSignificant	146.7 to 195.8	2020-2024
Lung & bronchus	New cases	56.5	51.8	1.09x	45.4 to 70.7	2019-2023
Pancreas	New cases	14.4	13.9	1.04x	7.6 to 25.4	2019-2023
Pancreas	Deaths	11.2	11.3	0.99x	5.7 to 20.9	2020-2024
Leukemia	New cases	14.2	14.5	0.98x	6.4 to 27	2019-2023
All cancer	New cases	428.4	453.4	0.94x	390.2 to 470	2019-2023
Bladder	New cases	14	18.7	0.75x	9.5 to 22	2019-2023
Non-Hodgkin lymphoma	New cases	12.4	18.5	0.67x	7.1 to 21.5	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 La Paz County
Measure	County	U.S. median	Difference	Unit
Premature death	23,645.2	9,842.6	+140%	years of life lost before age 75 per 100,000
Life expectancy	69.3	75.3	-8%	years
Child mortality	112.5	59.8	+88%	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	193.6	96.9	+100%	deaths per 100,000
Drug overdose deaths	62.5	28.6	+119%	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.

Formaldehyde14.14 per million
Carbon Tetrachloride2.82 per million
Acetaldehyde0.71 per million
Benzene0.44 per million

EPA Air Quality Index 2025

Monitored on 363 days: 278 good, 1 unhealthy for sensitive groups or worse. Median AQI 44, peak 253.

Regulated facilities, sites and hazards by type

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

Gas station (mapped facility)38
Industrial wastewater discharge32
Rail grade crossing29
NPDES wastewater discharge permit27
Wastewater plant (mapped facility)8
Public airport6
Brownfield property5
Major air pollution source4
Air permit holder (minor source)4
Small hazardous waste generator4
Large greenhouse gas emitter3
EPA air quality monitor1
Large hazardous waste generator1
Heliport1
Hydroelectric plant1
Solar power plant1
Scrapyard (mapped facility)1
TRI reporting facility1
Toxic chemical release facility (TRI)1

Highest-severity records

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

Joint Venture Wwtf, Parker
NPDES wastewater discharge permit.
EPA FRS registry ID 110006785381 (U.S. EPA ECHO) Agency record
Severity 6
Morgan Truck Body Llc, Ehrenberg
TRI reporting facility.
EPA FRS registry ID 110022524277 (U.S. EPA ECHO) Agency record
Severity 4.3
Arizona & California Railroad, Parker
NPDES wastewater discharge permit.
EPA FRS registry ID 110037375104 (U.S. EPA ECHO) Agency record
Severity 4.3
El Paso Natural Gas Co - Wenden Compressor Station, Wenden
Major air pollution source.
EPA FRS registry ID 110010378821 (U.S. EPA ECHO) Agency record
Severity 3.5
El Paso Natural Gas Co - Alamo Lake Comp, Wenden
Major air pollution source.
EPA FRS registry ID 110010378830 (U.S. EPA ECHO) Agency record
Severity 3.5
La Paz County Regional Landfill, Parker
Major air pollution source.
EPA FRS registry ID 110012625132 (U.S. EPA ECHO) Agency record
Severity 3.5
North Baja Compressor Station, Ehrenberg
Major air pollution source.
EPA FRS registry ID 110013388477 (U.S. EPA ECHO) Agency record
Severity 3.5
Parker Civic Buildings, Parker
Brownfield property.
EPA FRS registry ID 110042513759 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Crit -Dump At 11th And Mccabe Road, Parker
Brownfield property.
EPA FRS registry ID 110071969323 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Mosquito Flats, Parker
Brownfield property.
EPA FRS registry ID 110071977952 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Parker Courthouse, Parker
Brownfield property.
EPA FRS registry ID 110071980276 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Pop Harvey, Parker
Brownfield property.
EPA FRS registry ID 110071980280 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
La Paz County Regional Landfill, Parker
NPDES wastewater discharge permit.
EPA FRS registry ID 110012625132 (U.S. EPA ECHO) Agency record
Severity 3
North Baja Compressor Station, Ehrenberg
NPDES wastewater discharge permit.
EPA FRS registry ID 110013388477 (U.S. EPA ECHO) Agency record
Severity 3
Desotec Frmly Evoqua Water Technologies, Parker
Large hazardous waste generator.
EPA FRS registry ID 110058917739 (U.S. EPA ECHO) Agency record
Severity 3
Desotec Frmly Evoqua Water Technologies, Parker
NPDES wastewater discharge permit.
EPA FRS registry ID 110058917739 (U.S. EPA ECHO) Agency record
Severity 3
Morgan Truck Body Llc Maz Ehrenberg, Ehrenberg
Toxic chemical release facility (TRI). Chemicals: Diisocyanates.
TRI facility ID 85334MRGNC18275 (U.S. EPA Toxics Release Inventory)
Severity 3
ALAMO LAKE, Wenden
EPA air quality monitor.
Record ID 040128000 (U.S. EPA AirData)
Severity 2.9
Quartzsite, Town Of - Wwtp, Quartzsite
NPDES wastewater discharge permit.
EPA FRS registry ID 110010062528 (U.S. EPA ECHO) Agency record
Severity 2.8
El Paso Natural Gas Co - Alamo Lake Comp, Wenden
Large greenhouse gas emitter.
EPA FRS registry ID 110010378830 (U.S. EPA ECHO) Agency record
Severity 2.5
La Paz County Regional Landfill, Parker
Large greenhouse gas emitter.
EPA FRS registry ID 110012625132 (U.S. EPA ECHO) Agency record
Severity 2.5
North Baja Compressor Station, Ehrenberg
Large greenhouse gas emitter.
EPA FRS registry ID 110013388477 (U.S. EPA ECHO) Agency record
Severity 2.5
Avi Suquilla, Parker
Public airport. O.
Record ID P20 (FAA / U.S. DOT)
Severity 2
Wastewater Plant
Wastewater plant (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/68717630 (OpenStreetMap contributors) Agency record
Severity 2
Wastewater Plant
Wastewater plant (mapped facility). Mapped facility presence only; no compliance or exposure measurements.
Record ID way/68717736 (OpenStreetMap contributors) Agency record
Severity 2

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 La Paz County

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