Flood Zone Comparison
Compare key metrics between 18702 18702, PA — Zone X and 21791 21791, MD — Zone X. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 18702 18702, PA — Zone X | 21791 21791, MD — Zone X |
|---|---|---|
| name | 18702 18702, PA — Zone X | 21791 21791, MD — Zone X |
| zip code | 18702 | 21791 |
| city | 18702 | 21791 |
| state | Pennsylvania | Maryland |
| state code | PA | MD |
| category | Low Risk | Low Risk |
| flood zone | Zone X (Low Risk — Minimal Flood Hazard) | Zone X (Low Risk — Minimal Flood Hazard) |
| risk level | Low Risk | Low Risk |
| annual flood prob | Less than 0.2% annual chance | Less than 0.2% annual chance |
| insurance required | Optional — minimal flood hazard area | Optional — minimal flood hazard area |
| avg annual premium | 245 | 245 |
| base flood elevation | N/A — not in Special Flood Hazard Area | N/A — not in Special Flood Hazard Area |
| historical floods | 2 recorded flood events in the past 50 years. Most recent major flood: 2021 | 0 recorded flood events in the past 50 years |
| nearest water | Galveston Bay (2.0 miles) | Susquehanna River (0.8 miles) |
| elevation ft | 755 | 1,359 |
| population | 17,528 | 76,808 |
| median home value | 248,346 | 415,855 |
| flood damage risk | 5-10% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $19,512 | 5-10% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $28,340 |
| mitigation tips | While flood risk is minimal, consider affordable flood insurance; maintain proper drainage around foundation; keep storm drains clear; be aware that 25% of flood claims come from low-risk zones; have an emergency plan. | While flood risk is minimal, consider affordable flood insurance; maintain proper drainage around foundation; keep storm drains clear; be aware that 25% of flood claims come from low-risk zones; have an emergency plan. |
| fema map id | 6420C408J | 6218C526J |
| 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.