Compare towns by mapped Flood Zone 3 coverage
See towns grouped by the share of their land area in Flood Zone 3. These are coverage bands, not a safest-to-riskiest league table.
Flood Map for Planning Flood Zones, revision 20 May 2026 · 6,807 eligible towns
How to read this comparison
Zero mapped coverage does not mean flood-free. This measure is about land area, not the percentage of homes at risk, and does not include surface-water flooding.
Eligibility, ordering and limitations
A published controlled Flood Map for Planning result for the town.
Flood Zone 3 includes land with a 1% or greater annual river-flood probability or a 0.5% or greater annual sea-flood probability, ignoring the presence of defences. The mapped overlap with the town boundary is grouped into four bands. Towns are listed alphabetically within the selected band, with no ordinal ranks.
Explore the coverage groups
181 matching towns from 6,807 eligible towns. Alphabetical listing; no ranks.
Scroll sideways to see all columns.
| Town | Land area in Zone 3 | Coverage band |
|---|---|---|
| HillcommonSomerset | 0.00% | 0% mapped Zone 3 |
| Hinton St GeorgeSomerset | 0.00% | 0% mapped Zone 3 |
| Horton and BroadwaySomerset | 4.04% | 1% to below 5% |
| HuntspillSomerset | 100.00% | 5% or more |
| IlchesterSomerset | 9.17% | 5% or more |
| IlminsterSomerset | 9.88% | 5% or more |
| IltonSomerset | 1.81% | 1% to below 5% |
| Keinton MandevilleSomerset | 0.00% | 0% mapped Zone 3 |
| KilveSomerset | 11.59% | 5% or more |
| Kingsbury EpiscopiSomerset | 14.02% | 5% or more |
| KingsdonSomerset | 0.00% | 0% mapped Zone 3 |
| Kingston St MarySomerset | 5.90% | 5% or more |
| Langford BudvilleSomerset | 0.00% | 0% mapped Zone 3 |
| LangportSomerset | 8.97% | 5% or more |
| Long LoadSomerset | 5.91% | 5% or more |
| Lower WeareSomerset | 3.81% | 1% to below 5% |
| LympshamSomerset | 99.29% | 5% or more |
| MarkSomerset | 2.75% | 1% to below 5% |
| Mark CausewaySomerset | 46.01% | 5% or more |
| Marston MagnaSomerset | 12.70% | 5% or more |
| MartockSomerset | 5.95% | 5% or more |
| MeareSomerset | 0.63% | Above 0%, below 1% |
| Meare GreenSomerset | 0.00% | 0% mapped Zone 3 |
| MellsSomerset | 6.45% | 5% or more |
| MerriottSomerset | 2.48% | 1% to below 5% |
Environment Agency · Flood Map for Planning Flood Zones, revision 20 May 2026. Source details
Can I use this to judge a particular property’s flood risk?
No. A town can contain low-lying land and higher ground, and surface-water flooding is a separate risk. Use the town guide as context, then check the exact address using the Environment Agency flood-risk service and professional advice.
Check long-term flood risk for an addressCheck both kinds of flood mapping
Planning flood zones and surface-water coverage answer different questions. Explore surface-water coverage
Data sources
Dates below distinguish the period represented by the data from when the source was collected and published here. How we use these sources
Flood Map for Planning - Flood ZonesEnvironment Agency · Flood Map for Planning Flood Zones, revision 20 May 2026
- Data version
- Flood Map for Planning Flood Zones, revision 20 May 2026
- Source published
- 20 May 2026
- Retrieved by Kerbside
- 2 September 2026
- Published on Kerbside
- 2 September 2026
- Refresh cadence
- as needed
- Towns with a published result
- 6,807
Open original source · Open Government Licence v3.0
Publication reference: e315db85-8651-4532-b88f-b0f6233390a3. A published result is not a guarantee of complete local coverage.