Ohio Contamination Data

State Contamination Profile

Moderate Risk Level49,306 documented sites
Ohio ranks 12th of 50 states by severity-weighted density — a screening measure of how much documented history sits in the federal record per square mile. That describes the record, not any single yard: the map shows where each documented site actually sits.

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

High-severity counts the top severity tier of the record — the sites most worth checking distances against.

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.

Agricultural 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: High

We checked the federal record around Cuyahoga County5,284 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 ControlBrownfields · ~0.6 km from the county center
  • Coyne Textile ServicesBrownfields · ~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: High

We checked the federal record around Hamilton County3,081 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 CleanersBrownfields · ~0.2 km from the county center
  • Family Dollar #1792Brownfields · ~0.2 km from the county center
  • Bp Oil Co. #09001Underground 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: High

We checked the federal record around Franklin County3,894 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 76Underground Storage Tanks · ~0.2 km from the county center
  • Hamilton Parker Co.Underground Storage Tanks · ~0.3 km from the county center
  • Cca DevelopmentUnderground 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: High

We checked the federal record around Lucas County2,168 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 CoBrownfields · ~0.2 km from the county center
  • Toledo-Lucas Port AuthorityUnderground 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: High

We checked the federal record around Montgomery County2,335 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 FacilityUnderground Storage Tanks · ~0.8 km from the county center
  • Dollar General Store #13205Brownfields · ~0.8 km from the county center
  • Qrp Inc Dba Affordable Auto PartsBrownfields · ~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: High

We checked the federal record around Summit County2,254 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 FacilityUnderground Storage Tanks · ~0.9 km from the county center
  • Sackett Hills Pump StationUnderground Storage Tanks · ~0.9 km from the county center
  • Valley View Golf ClubUnderground 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

High

947 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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Read your Ohio parcel

See exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.

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25+ data sources analyzed in seconds

EPA FRS CERCLISArcGIS Online UST FinderEPA FRS TRIEPA FRS ACRESEPA UCMR 5USGS Water Quality PortalEPA FRS NPDESUSGS MRDSUSGS NAWQA EPest