Total Sites
2,435
9 federal databases
Severity Density
47.67
Severity-weighted sites per sq mi
High-Severity Sites
52
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in District of Columbia
District of Columbia County carries District of Columbia's densest documented record — 47.67 severity-weighted sites per square mile across 2,435 records, most commonly Underground Storage Tanks, including 52 high-severity sites. Density describes the county's record, not any single parcel.
| County | Sites | Density | Dominant Source |
|---|---|---|---|
| District of Columbia | 2,435 | 47.67 | Underground Storage Tanks |
County-Level Detail in District of Columbia
The federal record isn't uniform across a state. Here's what's documented around District of Columbia'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 District of Columbia?
Federal record: HighWe checked the federal record around District of Columbia — 2,435 documented sites across 6 of the 9 source types we track, 52 of them high-severity.
The most significant on record: 50 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
District of Columbia carries one of the heavier federal records we track — 2,435 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 District of Columbia center
- Murray Emergency Service — Underground Storage Tanks · ~0.1 km from the county center
- Yale Steam Laudry — Underground Storage Tanks · ~0.1 km from the county center
- Safeway Store #2737 — Brownfields · ~0.1 km from the county center
These are the closest documented sites to District of Columbia's geographic center — a screening reference, not a reading on any specific address. Check your own District of Columbia parcel to see what's actually near you.
Check an Address in District of Columbia
Read your District of Columbia 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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