Flood Zone Comparison
Compare key metrics between 21840 21840, MD — Zone A and 30113 30113, GA — Zone A. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 21840 21840, MD — Zone A | 30113 30113, GA — Zone A |
|---|---|---|
| name | 21840 21840, MD — Zone A | 30113 30113, GA — Zone A |
| zip code | 21840 | 30113 |
| city | 21840 | 30113 |
| state | Maryland | Georgia |
| state code | MD | GA |
| category | High Risk | High Risk |
| flood zone | Zone A (High Risk — 100-Year Floodplain, No BFE) | Zone A (High Risk — 100-Year Floodplain, No BFE) |
| 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 | 1,487 | 1,487 |
| base flood elevation | 9 ft | 11 ft |
| historical floods | 3 recorded flood events in the past 50 years. Most recent major flood: 2023 | 0 recorded flood events in the past 50 years |
| nearest water | Mississippi River (0.8 miles) | retention pond (0.8 miles) |
| elevation ft | 1,270 | 1,409 |
| population | 57,926 | 71,191 |
| median home value | 188,745 | 574,790 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $146,318 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $69,069 |
| 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 | 1029C763J | 2832C808J |
| 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.