City vs city
New Boston vs Portsmouth, NH
Portsmouth currently scores 10 points higher overall than New Boston, 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 is a current EPA AirNow signal; 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
New Boston: 31/100 · Portsmouth: 41/100
Portsmouth is 10 points higher.
Flood
New Boston: 88/100 · Portsmouth: 73/100
New Boston is 15 points higher.
New Boston: FEMA NFHL flood zones: 8 features intersect this tile.
Portsmouth: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
New Boston: 21/100 · Portsmouth: 23/100
Portsmouth is 2 points higher.
New Boston: Wind exposure derived from ingested design wind / climatology tiles.
Portsmouth: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
New Boston: 8/100 · Portsmouth: 6/100
New Boston is 2 points higher.
New Boston: Lightning exposure derived from ingested climatology tiles.
Portsmouth: Lightning exposure derived from ingested climatology tiles.
Tornado
New Boston: 12/100 · Portsmouth: 0/100
New Boston is 12 points higher.
New Boston: Tornado risk derived from NOAA SPC historical reports.
Portsmouth: Tornado risk derived from NOAA SPC historical reports.
Hail
New Boston: 11/100 · Portsmouth: 22/100
Portsmouth is 11 points higher.
New Boston: Hail risk derived from NOAA SPC historical reports.
Portsmouth: Hail risk derived from NOAA SPC historical reports.
Storm surge
New Boston: Unavailable · Portsmouth: 98/100
A score difference cannot be calculated without both sources.
New Boston: Storm surge model is not available for this location yet.
Portsmouth: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
New Boston: 53/100 · Portsmouth: 43/100
New Boston is 10 points higher.
New Boston: Wildfire exposure derived from ingested fire potential tiles.
Portsmouth: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
New Boston: 24/100 · Portsmouth: 23/100
New Boston is 1 points higher.
New Boston: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Portsmouth: Air quality signal derived from the latest EPA AirNow combined AQI grid.