Flood Zone Comparison
Compare key metrics between 20689 20689, MD — Zone AE and 52218 52218, IA — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 20689 20689, MD — Zone AE | 52218 52218, IA — Zone AE |
|---|---|---|
| name | 20689 20689, MD — Zone AE | 52218 52218, IA — Zone AE |
| zip code | 20689 | 52218 |
| city | 20689 | 52218 |
| state | Maryland | Iowa |
| state code | MD | IA |
| category | High Risk | High Risk |
| flood zone | Zone AE (High Risk — 100-Year Floodplain) | Zone AE (High Risk — 100-Year Floodplain) |
| risk level | High Risk | High Risk |
| annual flood prob | 1% annual chance (100-year flood) | 1% annual chance (100-year flood) |
| insurance required | Required for federally-backed mortgages | Required for federally-backed mortgages |
| avg annual premium | 1,447 | 1,447 |
| base flood elevation | 10 ft | 10 ft |
| historical floods | 2 recorded flood events in the past 50 years. Most recent major flood: 2009 | 6 recorded flood events in the past 50 years. Most recent major flood: 2019 |
| nearest water | Lake Huron (4.2 miles) | Susquehanna River (3.5 miles) |
| elevation ft | 243 | 86 |
| population | 6,140 | 8,348 |
| median home value | 397,768 | 224,930 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $11,133 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $117,400 |
| mitigation tips | 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. | 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 | 9319C263J | 2475C527J |
| 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.