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Belknap County, New Hampshire: environmental and disease records

Cancer mortality in Belknap County is 153.2 deaths per 100,000 people per year against a U.S. rate of 143.2. The strongest disease signals are Kidney & renal pelvis deaths at 1.6 times the U.S. rate. Federal databases place 378 regulated facilities, sites and hazards inside the county, led by NPDES wastewater discharge permit (132), Rail grade crossing (79), Air permit holder (minor source) (50). One correctional facility operates in the county. 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: 43.5235, -71.4346.

How this county ranks in New Hampshire

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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 Belknap County compared with the United States
Cancer	Measure	County rate	U.S. rate	Times U.S.	95% interval	Years
Kidney & renal pelvis	Deaths	5.4	3.4	1.59xSignificant	3.5 to 8.2	2020-2024
Melanoma of the skin	New cases	36.8	23.8	1.55xSignificant	31.3 to 43.2	2019-2023
Bladder	New cases	24	18.7	1.28xSignificant	19.9 to 28.8	2019-2023
Liver & bile duct	Deaths	8.3	6.6	1.26x	6.1 to 11.2	2020-2024
Brain & nervous system	Deaths	5.5	4.4	1.25x	3.6 to 8.3	2020-2024
Kidney & renal pelvis	New cases	21.8	17.9	1.22x	17.7 to 26.8	2019-2023
Esophagus	New cases	5.6	4.6	1.22x	3.8 to 8.2	2019-2023
Esophagus	Deaths	4.5	3.7	1.22x	2.8 to 7	2020-2024
Lung & bronchus	New cases	60.4	51.8	1.17xSignificant	54 to 67.6	2019-2023
Pancreas	New cases	16.1	13.9	1.16x	12.6 to 20.3	2019-2023
Non-Hodgkin lymphoma	Deaths	5.4	4.8	1.13x	3.5 to 8	2020-2024
Lung & bronchus	Deaths	33.3	30.2	1.1x	28.6 to 38.8	2020-2024
All cancer	New cases	489.7	453.4	1.08xSignificant	469.4 to 510.7	2019-2023
All cancer	Deaths	153.2	143.2	1.07x	142.5 to 164.6	2020-2024
Leukemia	Deaths	6	5.7	1.05x	4 to 8.8	2020-2024
Pancreas	Deaths	11.8	11.3	1.04x	9 to 15.3	2020-2024
Non-Hodgkin lymphoma	New cases	19.1	18.5	1.03x	15.2 to 23.7	2019-2023
Brain & nervous system	New cases	6.1	6.2	0.98x	3.9 to 9.3	2019-2023
Bladder	Deaths	3.6	4.1	0.88x	2.1 to 6	2020-2024
Liver & bile duct	New cases	7.4	8.7	0.85x	5.2 to 10.3	2019-2023
Leukemia	New cases	9.5	14.5	0.66x	6.8 to 13.1	2019-2023
Thyroid	New cases	8.2	13	0.63x	5.4 to 12	2019-2023
Stomach	New cases	3.6	6.6	0.55x	2.2 to 6	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 Belknap County
Measure	County	U.S. median	Difference	Unit
Premature death	7,596.4	9,842.6	-23%	years of life lost before age 75 per 100,000
Life expectancy	77.4	75.3	+3%	years
Child mortality	46.6	59.8	-22%	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	106.4	96.9	+10%	deaths per 100,000
Drug overdose deaths	31.4	28.6	+10%	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.

Formaldehyde13.06 per million
Carbon Tetrachloride2.98 per million
Acetaldehyde1.58 per million
Naphthalene1.43 per million

EPA Air Quality Index 2025

Monitored on 365 days: 324 good, 0 unhealthy for sensitive groups or worse. Median AQI 32, peak 92.

Regulated facilities, sites and hazards by type

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

NPDES wastewater discharge permit132
Rail grade crossing79
Air permit holder (minor source)50
Gas station (mapped facility)36
Auto repair or body shop (mapped facility)20
Brownfield property10
Small hazardous waste generator9
Heliport9
Large hazardous waste generator5
Airfield4
TRI reporting facility4
Toxic chemical release facility (TRI)4
EPA air quality monitor3
Industrial wastewater discharge3
Dry cleaner (mapped facility)2
Hydroelectric plant2
Scrapyard (mapped facility)2
Public airport1
Commercial airport1
Correctional facility (prison or jail)1
Landfill (mapped facility)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.

Spx Aids To Navigation, Tilton
TRI reporting facility.
EPA FRS registry ID 110071732215 (U.S. EPA ECHO) Agency record
Severity 5.1
Spx Aids To Navigation, Tilton
Toxic chemical release facility (TRI). Chemicals: Diisocyanates. 467 lbs released over 5 years.
TRI facility ID 0327WSPXDS61BUS (U.S. EPA Toxics Release Inventory)
Severity 5
Aavid Thermalloy, Laconia
TRI reporting facility.
EPA FRS registry ID 110000313740 (U.S. EPA ECHO) Agency record
Severity 4.8
Rymes - Laconia, Laconia
Toxic chemical release facility (TRI). Chemicals: Polycyclic aromatic compounds, Benzo[g,h,i]perylene, Cyclohexane, Ethylbenzene and 4 more. Reports carcinogens.
TRI facility ID 0324WRYMSX64PRI (U.S. EPA Toxics Release Inventory)
Severity 4.5
New Hampton State Fish Hatchery, New Hampton
NPDES wastewater discharge permit.
EPA FRS registry ID 110071093835 (U.S. EPA ECHO) Agency record
Severity 4.5
New Hampshire Ball Bearings Inc, Laconia
Toxic chemical release facility (TRI). Chemicals: Nickel compounds, Copper compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region), Copper And Copper Compounds and 2 more. Reports carcinogens.
TRI facility ID 03246NWHMP155LE (U.S. EPA Toxics Release Inventory)
Severity 4.5
Pike Industries Inc - Northfield, Northfield
TRI reporting facility.
EPA FRS registry ID 110028225793 (U.S. EPA ECHO) Agency record
Severity 4.3
Boyd Laconia Llc, Laconia
Toxic chemical release facility (TRI). Chemicals: Copper. 20 lbs released over 5 years.
TRI facility ID 03247VDNGNONEKO (U.S. EPA Toxics Release Inventory)
Severity 4
New Hampshire Ball Bearings, Laconia
TRI reporting facility.
EPA FRS registry ID 110000313731 (U.S. EPA ECHO) Agency record
Severity 4
Aavid Thermalloy, Laconia
Large hazardous waste generator.
EPA FRS registry ID 110000313740 (U.S. EPA ECHO) Agency record
Severity 3.8
Smiths Tubular Systems Inc, Laconia
Large hazardous waste generator.
EPA FRS registry ID 110000885533 (U.S. EPA ECHO) Agency record
Severity 3.3
Former Lemay Property, Gilford
Brownfield property.
EPA FRS registry ID 110038744687 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Rogers Property, Center Barnstead
Brownfield property.
EPA FRS registry ID 110038744865 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Mechanic Street School, Laconia
Brownfield property.
EPA FRS registry ID 110038752819 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Laconia Millworks (Formerly Allen Rogers), Laconia
Brownfield property.
EPA FRS registry ID 110038823486 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Former Currier Property, Sanbornton
Brownfield property.
EPA FRS registry ID 110039687292 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Turchin Estate Property (Ernie'S Auto), Tilton
Brownfield property.
EPA FRS registry ID 110043082874 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Madeira Property, Laconia
Brownfield property.
EPA FRS registry ID 110071965791 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Lakes Region Facility, Laconia
Brownfield property.
EPA FRS registry ID 110071967721 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
New England Yard, Laconia
Brownfield property.
EPA FRS registry ID 110071968164 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
Colonial Theatre, Laconia
Brownfield property.
EPA FRS registry ID 110071968431 (U.S. EPA Brownfields (ACRES)) Agency record
Severity 3
New Hampshire Ball Bearings, Laconia
Large hazardous waste generator.
EPA FRS registry ID 110000313731 (U.S. EPA ECHO) Agency record
Severity 3
Walmart Tire & Lube Express, Tilton
Small hazardous waste generator. Penalties $990.
EPA FRS registry ID 110004095700 (U.S. EPA ECHO) Agency record
Severity 3
Smiths Tubular Systems, Laconia
Large hazardous waste generator.
EPA FRS registry ID 110014466292 (U.S. EPA ECHO) Agency record
Severity 3
Gs Precision Laconia Division, Laconia
Large hazardous waste generator.
EPA FRS registry ID 110071680365 (U.S. EPA ECHO) Agency record
Severity 3

Correctional facilities

Prisons, jails and corrections operations with an EPA facility record, and the drinking water and wastewater compliance attached to them.

Nh Dept Of Corrections Laconia, Laconia
EPA FRS registry ID
110001521425
Water system
NH1281020
Health-based violations
0 all time, 0 in 5 years
All violations
17
Wastewater permit
None on record
EPA detailed facility report

Discovery / public records

Records to request for Belknap County

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