Total Sites
21,752
9 federal databases
Severity Density
0.33
Severity-weighted sites per sq mi
High-Severity Sites
1,604
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in Oregon
Multnomah County carries Oregon's densest documented record — 9.64 severity-weighted sites per square mile across 3,488 records, most commonly Underground Storage Tanks, including 61 high-severity sites. Density describes the county's record, not any single parcel.
| County | Sites | Density | Dominant Source |
|---|---|---|---|
| Multnomah | 3,488 | 9.64 | Underground Storage Tanks |
| Washington | 1,675 | 2.90 | Underground Storage Tanks |
| Marion | 1,306 | 1.43 | Underground Storage Tanks |
| Josephine | 1,167 | 1.34 | Mining |
| Clackamas | 1,369 | 0.90 | Underground Storage Tanks |
| Jackson | 1,363 | 0.83 | Underground Storage Tanks |
| Yamhill | 424 | 0.72 | Underground Storage Tanks |
| Curry | 493 | 0.58 | Mining |
| Benton | 291 | 0.52 | Underground Storage Tanks |
| Lane | 1,687 | 0.49 | Underground Storage Tanks |
Multnomah
Sites
3K
Density
9.6
Source
Underground Storage TanksWashington
Sites
2K
Density
2.9
Source
Underground Storage TanksMarion
Sites
1K
Density
1.4
Source
Underground Storage TanksJosephine
Sites
1K
Density
1.3
Source
MiningClackamas
Sites
1K
Density
0.9
Source
Underground Storage TanksJackson
Sites
1K
Density
0.8
Source
Underground Storage TanksYamhill
Sites
424
Density
0.7
Source
Underground Storage TanksCurry
Sites
493
Density
0.6
Source
MiningBenton
Sites
291
Density
0.5
Source
Underground Storage TanksLane
Sites
2K
Density
0.5
Source
Underground Storage TanksAgricultural Pesticide Use in Oregon
In the 2019 federal survey estimates, Oregon's most-applied agricultural pesticides statewide were Glyphosate, 2,4-D and Atrazine. 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 Oregon
The federal record isn't uniform across a state. Here's what's documented around Oregon'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 Multnomah County?
Federal record: HighWe checked the federal record around Multnomah County — 3,488 documented sites across 8 of the 9 source types we track, 61 of them high-severity.
The most significant on record: 58 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Multnomah County carries one of the heavier federal records we track — 3,488 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 Multnomah County center
- Troutdale Transfer Station — Brownfields · ~0.2 km from the county center
- Fairview Farms (Old Site) — Underground Storage Tanks · ~0.6 km from the county center
- Carvana Llc — Brownfields · ~0.6 km from the county center
These are the closest documented sites to Multnomah County's geographic center — a screening reference, not a reading on any specific address. Check your own Oregon parcel to see what's actually near you.
Check an Address in Oregon
Read your Oregon parcel
See exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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