City vs city
Grafton vs Popponesset Island, MA
Grafton currently scores 4 points higher overall than Popponesset Island, with the largest gap in wildfire.
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
Grafton: 33/100 · Popponesset Island: 29/100
Grafton is 4 points higher.
Flood
Grafton: 38/100 · Popponesset Island: 22/100
Grafton is 16 points higher.
Grafton: FEMA NFHL flood zones: 9 features intersect this tile.
Popponesset Island: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Grafton: 26/100 · Popponesset Island: 37/100
Popponesset Island is 11 points higher.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
Popponesset Island: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 9/100 · Popponesset Island: 10/100
Popponesset Island is 1 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
Popponesset Island: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 0/100 · Popponesset Island: 0/100
No gap.
Grafton: Tornado risk derived from NOAA SPC historical reports.
Popponesset Island: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · Popponesset Island: 1/100
Grafton is 37 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
Popponesset Island: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · Popponesset Island: 97/100
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
Popponesset Island: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Grafton: 57/100 · Popponesset Island: 9/100
Grafton is 48 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
Popponesset Island: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 27/100 · Popponesset Island: 28/100
Popponesset Island is 1 points higher.
Grafton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Popponesset Island: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.