Total Sites
19,222
9 federal databases
Severity Density
5.38
Severity-weighted sites per sq mi
High-Severity Sites
342
Superfund NPL, PFAS detections + similar top-tier records
Data Sources
EPA, USGS
9 databases checked
Source Breakdown
Top Counties in Connecticut
Greater Bridgeport County carries Connecticut's densest documented record — 11.46 severity-weighted sites per square mile across 1,220 records, most commonly Underground Storage Tanks, including 22 high-severity sites. Density describes the county's record, not any single parcel.
| County | Sites | Density | Dominant Source |
|---|---|---|---|
| Greater Bridgeport | 1,220 | 11.46 | Underground Storage Tanks |
| South Central Connecticut | 2,803 | 9.96 | Underground Storage Tanks |
| Naugatuck Valley | 2,498 | 8.35 | Underground Storage Tanks |
| Capitol | 5,491 | 7.17 | Underground Storage Tanks |
| Western Connecticut | 2,573 | 6.41 | Underground Storage Tanks |
| Southeastern Connecticut | 1,662 | 3.80 | Underground Storage Tanks |
| Lower Connecticut River Valley | 1,118 | 3.71 | Underground Storage Tanks |
| Northeastern Connecticut | 850 | 2.32 | Underground Storage Tanks |
| Northwest Hills | 1,007 | 1.85 | Underground Storage Tanks |
Greater Bridgeport
Sites
1K
Density
11.5
Source
Underground Storage TanksSouth Central Connecticut
Sites
3K
Density
10.0
Source
Underground Storage TanksNaugatuck Valley
Sites
2K
Density
8.3
Source
Underground Storage TanksCapitol
Sites
5K
Density
7.2
Source
Underground Storage TanksWestern Connecticut
Sites
3K
Density
6.4
Source
Underground Storage TanksSoutheastern Connecticut
Sites
2K
Density
3.8
Source
Underground Storage TanksLower Connecticut River Valley
Sites
1K
Density
3.7
Source
Underground Storage TanksNortheastern Connecticut
Sites
850
Density
2.3
Source
Underground Storage TanksNorthwest Hills
Sites
1K
Density
1.8
Source
Underground Storage TanksAgricultural Pesticide Use in Connecticut
In the 2019 federal survey estimates, Connecticut's most-applied agricultural pesticides statewide were Glyphosate, Metolachlor & Metolachlor-S 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 Connecticut
The federal record isn't uniform across a state. Here's what's documented around Connecticut'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 Greater Bridgeport County?
Federal record: HighWe checked the federal record around Greater Bridgeport County — 1,220 documented sites across 6 of the 9 source types we track, 22 of them high-severity.
The most significant on record: 19 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Greater Bridgeport County carries one of the heavier federal records we track — 1,220 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 Greater Bridgeport County center
- 2001 Park Ave — Brownfields · ~0.2 km from the county center
- New England Heating Supply Llc — Brownfields · ~0.3 km from the county center
- Mobil Oil Corp Serv Sta Hg0 — Brownfields · ~0.3 km from the county center
These are the closest documented sites to Greater Bridgeport County's geographic center — a screening reference, not a reading on any specific address. Check your own Connecticut parcel to see what's actually near you.
Is It Safe to Grow Food in South Central Connecticut County?
Federal record: HighWe checked the federal record around South Central Connecticut County — 2,803 documented sites across 7 of the 9 source types we track, 27 of them high-severity.
The most significant on record: 24 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
South Central Connecticut County carries one of the heavier federal records we track — 2,803 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 South Central Connecticut County center
- Global Montello Group # 837 — Underground Storage Tanks · ~0.5 km from the county center
- Alliance Energy Llc #836 — Underground Storage Tanks · ~0.6 km from the county center
- Walmart #2232 — Brownfields · ~1.2 km from the county center
These are the closest documented sites to South Central Connecticut County's geographic center — a screening reference, not a reading on any specific address. Check your own Connecticut parcel to see what's actually near you.
Is It Safe to Grow Food in Naugatuck Valley County?
Federal record: HighWe checked the federal record around Naugatuck Valley County — 2,498 documented sites across 7 of the 9 source types we track, 66 of them high-severity.
The most significant on record: 57 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Naugatuck Valley County carries one of the heavier federal records we track — 2,498 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 Naugatuck Valley County center
- Wpca Pump Station #1 — Underground Storage Tanks · ~0.7 km from the county center
- Wpca Pump Station #5 — Underground Storage Tanks · ~1.4 km from the county center
- Middlebury Highway Dept. Garage — Underground Storage Tanks · ~2.0 km from the county center
These are the closest documented sites to Naugatuck Valley County's geographic center — a screening reference, not a reading on any specific address. Check your own Connecticut parcel to see what's actually near you.
Is It Safe to Grow Food in Capitol County?
Federal record: HighWe checked the federal record around Capitol County — 5,491 documented sites across 8 of the 9 source types we track, 98 of them high-severity.
The most significant on record: 83 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Capitol County carries one of the heavier federal records we track — 5,491 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 Capitol County center
- Fluoropolymer Resources, Llc — Toxic Release Inventory · ~1.3 km from the county center
- Ct- Sw 136 — Nitrate · ~1.4 km from the county center
- Eastern Roofing Corp — Underground Storage Tanks · ~1.6 km from the county center
These are the closest documented sites to Capitol County's geographic center — a screening reference, not a reading on any specific address. Check your own Connecticut parcel to see what's actually near you.
Is It Safe to Grow Food in Western Connecticut County?
Federal record: HighWe checked the federal record around Western Connecticut County — 2,573 documented sites across 7 of the 9 source types we track, 49 of them high-severity.
The most significant on record: 34 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Western Connecticut County carries one of the heavier federal records we track — 2,573 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 Western Connecticut County center
- Redding Oil Storage — Underground Storage Tanks · ~0.1 km from the county center
- Cvs Pharmacy #10462 — Brownfields · ~1.3 km from the county center
- Branchville Mica Mine — Mining · ~1.4 km from the county center
These are the closest documented sites to Western Connecticut County's geographic center — a screening reference, not a reading on any specific address. Check your own Connecticut parcel to see what's actually near you.
Check an Address in Connecticut
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