City vs city
Blackwells Mills vs Manville, NJ
Manville currently scores 11 points higher overall than Blackwells Mills, with the largest gap in hail.
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
Blackwells Mills: 29/100 · Manville: 40/100
Manville is 11 points higher.
Flood
Blackwells Mills: 17/100 · Manville: 20/100
Manville is 3 points higher.
Blackwells Mills: FEMA NFHL flood zones: 14 features intersect this tile.
Manville: FEMA NFHL flood zones: 17 features intersect this tile.
Wind
Blackwells Mills: 22/100 · Manville: 22/100
No gap.
Blackwells Mills: Wind exposure derived from ingested design wind / climatology tiles.
Manville: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Blackwells Mills: 20/100 · Manville: 20/100
No gap.
Blackwells Mills: Lightning exposure derived from ingested climatology tiles.
Manville: Lightning exposure derived from ingested climatology tiles.
Tornado
Blackwells Mills: 0/100 · Manville: 0/100
No gap.
Blackwells Mills: Tornado risk derived from NOAA SPC historical reports.
Manville: Tornado risk derived from NOAA SPC historical reports.
Hail
Blackwells Mills: 6/100 · Manville: 14/100
Manville is 8 points higher.
Blackwells Mills: Hail risk derived from NOAA SPC historical reports.
Manville: Hail risk derived from NOAA SPC historical reports.
Storm surge
Blackwells Mills: Unavailable · Manville: 99/100
A score difference cannot be calculated without both sources.
Blackwells Mills: Storm surge model is not available for this location yet.
Manville: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Blackwells Mills: 73/100 · Manville: 71/100
Blackwells Mills is 2 points higher.
Blackwells Mills: Wildfire exposure derived from ingested fire potential tiles.
Manville: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Blackwells Mills: 37/100 · Manville: 37/100
No gap.
Blackwells Mills: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Manville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.