Total Sites
49,306
9 federal databases
Severity Density
1.57
Severity-weighted sites per sq mi
High-Severity Sites
871
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in Ohio
Cuyahoga County carries Ohio's densest documented record — 14.65 severity-weighted sites per square mile across 5,284 records, most commonly Underground Storage Tanks, including 78 high-severity sites. Density describes the county's record, not any single parcel.
| County | Sites | Density | Dominant Source |
|---|---|---|---|
| Cuyahoga | 5,284 | 14.65 | Underground Storage Tanks |
| Hamilton | 3,081 | 9.76 | Underground Storage Tanks |
| Franklin | 3,894 | 9.16 | Underground Storage Tanks |
| Lucas | 2,168 | 8.31 | Underground Storage Tanks |
| Montgomery | 2,335 | 6.80 | Underground Storage Tanks |
| Summit | 2,254 | 6.78 | Underground Storage Tanks |
| Lake | 947 | 5.28 | Underground Storage Tanks |
| Butler | 1,349 | 3.90 | Underground Storage Tanks |
| Stark | 1,577 | 3.42 | Underground Storage Tanks |
| Mahoning | 995 | 3.02 | Underground Storage Tanks |
Cuyahoga
Sites
5K
Density
14.6
Source
Underground Storage TanksHamilton
Sites
3K
Density
9.8
Source
Underground Storage TanksFranklin
Sites
4K
Density
9.2
Source
Underground Storage TanksLucas
Sites
2K
Density
8.3
Source
Underground Storage TanksMontgomery
Sites
2K
Density
6.8
Source
Underground Storage TanksSummit
Sites
2K
Density
6.8
Source
Underground Storage TanksLake
Sites
947
Density
5.3
Source
Underground Storage TanksButler
Sites
1K
Density
3.9
Source
Underground Storage TanksStark
Sites
2K
Density
3.4
Source
Underground Storage TanksMahoning
Sites
995
Density
3.0
Source
Underground Storage TanksAgricultural Pesticide Use in Ohio
In the 2019 federal survey estimates, Ohio's most-applied agricultural pesticides statewide were Glyphosate, Atrazine and Metolachlor & Metolachlor-S. These estimates describe agricultural land use across the state — context for what's in use around the region, not a reading on any garden's soil.
Pesticide data: USGS NAWQA Pesticide National Synthesis Project (EPest county-level use estimates). Latest available county estimates: 2019.
County-Level Detail in Ohio
The federal record isn't uniform across a state. Here's what's documented around Ohio's counties with the densest records — each read from that county's own sites, not the state average. Proximity is information, not a diagnosis; a soil test settles any near neighbor.
Is It Safe to Grow Food in Cuyahoga County?
Federal record: HighWe checked the federal record around Cuyahoga County — 5,284 documented sites across 6 of the 9 source types we track, 78 of them high-severity.
The most significant on record: 74 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Cuyahoga County carries one of the heavier federal records we track — 5,284 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Cuyahoga County center
- Bratenahl Place Condo Assoc. — Underground Storage Tanks · ~0.1 km from the county center
- Cleveland Water Pollution Control — Brownfields · ~0.6 km from the county center
- Coyne Textile Services — Brownfields · ~0.7 km from the county center
These are the closest documented sites to Cuyahoga County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
Is It Safe to Grow Food in Hamilton County?
Federal record: HighWe checked the federal record around Hamilton County — 3,081 documented sites across 7 of the 9 source types we track, 59 of them high-severity.
The most significant on record: 51 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Hamilton County carries one of the heavier federal records we track — 3,081 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Hamilton County center
- Springdale Cleaners — Brownfields · ~0.2 km from the county center
- Family Dollar #1792 — Brownfields · ~0.2 km from the county center
- Bp Oil Co. #09001 — Underground Storage Tanks · ~0.2 km from the county center
These are the closest documented sites to Hamilton County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
Is It Safe to Grow Food in Franklin County?
Federal record: HighWe checked the federal record around Franklin County — 3,894 documented sites across 7 of the 9 source types we track, 29 of them high-severity.
The most significant on record: 23 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Franklin County carries one of the heavier federal records we track — 3,894 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Franklin County center
- Big House 76 — Underground Storage Tanks · ~0.2 km from the county center
- Hamilton Parker Co. — Underground Storage Tanks · ~0.3 km from the county center
- Cca Development — Underground Storage Tanks · ~0.4 km from the county center
These are the closest documented sites to Franklin County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
Is It Safe to Grow Food in Lucas County?
Federal record: HighWe checked the federal record around Lucas County — 2,168 documented sites across 6 of the 9 source types we track, 59 of them high-severity.
The most significant on record: 54 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Lucas County carries one of the heavier federal records we track — 2,168 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Lucas County center
- Bituminous Products Co — Brownfields · ~0.2 km from the county center
- Toledo-Lucas Port Authority — Underground Storage Tanks · ~0.5 km from the county center
- Toledo World Industries, Inc. — Underground Storage Tanks · ~0.6 km from the county center
These are the closest documented sites to Lucas County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
Is It Safe to Grow Food in Montgomery County?
Federal record: HighWe checked the federal record around Montgomery County — 2,335 documented sites across 6 of the 9 source types we track, 55 of them high-severity.
The most significant on record: 48 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Montgomery County carries one of the heavier federal records we track — 2,335 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Montgomery County center
- Closed Facility — Underground Storage Tanks · ~0.8 km from the county center
- Dollar General Store #13205 — Brownfields · ~0.8 km from the county center
- Qrp Inc Dba Affordable Auto Parts — Brownfields · ~0.8 km from the county center
These are the closest documented sites to Montgomery County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
Is It Safe to Grow Food in Summit County?
Federal record: HighWe checked the federal record around Summit County — 2,254 documented sites across 6 of the 9 source types we track, 32 of them high-severity.
The most significant on record: 28 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Summit County carries one of the heavier federal records we track — 2,254 documented sites, most of them underground storage tanks. That's a record of the area's history, not a verdict on any one yard: proximity to a documented site is information, not a diagnosis. Before food beds go in, a professional soil test tells you exactly what you're working with — and raised beds with clean imported soil grow well almost anywhere in the meantime.
Documented sites nearest the Summit County center
- Former Corrections Facility — Underground Storage Tanks · ~0.9 km from the county center
- Sackett Hills Pump Station — Underground Storage Tanks · ~0.9 km from the county center
- Valley View Golf Club — Underground Storage Tanks · ~1.0 km from the county center
These are the closest documented sites to Summit County's geographic center — a screening reference, not a reading on any specific address. Check your own Ohio parcel to see what's actually near you.
More Ohio counties on the federal record
Lake County
High947 documented sites, most commonly underground storage tanks. Nearest: Pet Processors, L.l.c., ~0.9 km from the county center.
Check an Address in Ohio
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