City vs city
Groton vs Norwich, CT
Norwich currently scores 2 points higher overall than Groton, with the largest gap in flood.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Scores describe each city’s reference grid tile, not every property. A missing model is unavailable, not zero risk. Air quality uses an ingested EPA AirNow snapshot and may not reflect current conditions; other factors describe baseline exposure. The overall score blends different hazards and is not a probability of damage. Read the scoring methodology and sources.
Overall
Groton: 43/100 · Norwich: 45/100
Norwich is 2 points higher.
Flood
Groton: 97/100 · Norwich: 55/100
Groton is 42 points higher.
Groton: FEMA NFHL flood zones: 19 features intersect this tile.
Norwich: FEMA NFHL flood zones: 14 features intersect this tile.
Wind
Groton: 35/100 · Norwich: 31/100
Groton is 4 points higher.
Groton: Wind exposure derived from ingested design wind / climatology tiles.
Norwich: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Groton: 9/100 · Norwich: 10/100
Norwich is 1 points higher.
Groton: Lightning exposure derived from ingested climatology tiles.
Norwich: Lightning exposure derived from ingested climatology tiles.
Tornado
Groton: 0/100 · Norwich: 0/100
No gap.
Groton: Tornado risk derived from NOAA SPC historical reports.
Norwich: Tornado risk derived from NOAA SPC historical reports.
Hail
Groton: 6/100 · Norwich: 33/100
Norwich is 27 points higher.
Groton: Hail risk derived from NOAA SPC historical reports.
Norwich: Hail risk derived from NOAA SPC historical reports.
Storm surge
Groton: 97/100 · Norwich: 95/100
Groton is 2 points higher.
Groton: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Norwich: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Groton: 27/100 · Norwich: 59/100
Norwich is 32 points higher.
Groton: Wildfire exposure derived from ingested fire potential tiles.
Norwich: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Groton: 33/100 · Norwich: 32/100
Groton is 1 points higher.
Groton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Norwich: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.