Flood Zone Comparison
Compare key metrics between 03046 03046, NH — Zone D and 18421 18421, PA — Zone A. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 03046 03046, NH — Zone D | 18421 18421, PA — Zone A |
|---|---|---|
| name | 03046 03046, NH — Zone D | 18421 18421, PA — Zone A |
| zip code | 03046 | 18421 |
| city | 03046 | 18421 |
| state | New Hampshire | Pennsylvania |
| state code | NH | PA |
| category | Undetermined | High Risk |
| flood zone | Zone D (Undetermined Risk — No Analysis Performed) | Zone A (High Risk — 100-Year Floodplain, No BFE) |
| risk level | Undetermined | High Risk |
| annual flood prob | Unknown — flood risk not yet determined by FEMA | 1% annual chance (100-year flood) |
| insurance required | Recommended — risk is undetermined | Required for federally-backed mortgages |
| avg annual premium | 995 | 995 |
| base flood elevation | N/A — not in Special Flood Hazard Area | 10 ft |
| historical floods | 9 recorded flood events in the past 50 years. Most recent major flood: 2023 | 2 recorded flood events in the past 50 years. Most recent major flood: 2017 |
| nearest water | Rio Grande (0.1 miles) | Tampa Bay (2.2 miles) |
| elevation ft | 174 | 1,797 |
| population | 52,114 | 28,864 |
| median home value | 303,309 | 234,997 |
| flood damage risk | Unknown chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $162,122 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $138,054 |
| mitigation tips | Purchase flood insurance as a precaution; research historical flooding in your area; contact your local floodplain administrator; maintain proper drainage; prepare an emergency kit and evacuation plan. | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. |
| fema map id | 5929C793J | 4647C604J |
| last updated | 2025-01-01 | 2025-01-01 |
Our team analyzes data from FEMA National Flood Hazard Layer to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.