Total Sites
4,542
9 federal databases
Severity Density
0.89
Severity-weighted sites per sq mi
High-Severity Sites
88
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in Hawaii
Honolulu County carries Hawaii's densest documented record — 5.87 severity-weighted sites per square mile across 2,810 records, most commonly Underground Storage Tanks, including 69 high-severity sites. Density describes the county's record, not any single parcel.
County-Level Detail in Hawaii
The federal record isn't uniform across a state. Here's what's documented around Hawaii'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 Honolulu County?
Federal record: HighWe checked the federal record around Honolulu County — 2,810 documented sites across 7 of the 9 source types we track, 69 of them high-severity.
The most significant on record: 67 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Honolulu County carries one of the heavier federal records we track — 2,810 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 Honolulu County center
- Makaha 76/7-Eleven (#161) — Underground Storage Tanks · ~0.5 km from the county center
- Makaha Central Office — Underground Storage Tanks · ~0.6 km from the county center
- Angel's Makaha Union 5245 — Underground Storage Tanks · ~0.7 km from the county center
These are the closest documented sites to Honolulu County's geographic center — a screening reference, not a reading on any specific address. Check your own Hawaii parcel to see what's actually near you.
Check an Address in Hawaii
Read your Hawaii 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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