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Up to High likelihood
Properties in PL11 3HA sit in the Environment Agency's High flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 7 | 0 |
| Medium | 1% – 3.3% | 5 | 4 |
| Low | 0.1% – 1% | 0 | 0 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a high-likelihood area has at least a 57% chance of flooding at least once.
PL11 3HA gets about 1,200 mm of rain a year on average (wettest month December, 144 mm; driest June, 71 mm). That is close to the UK as a whole, which averages 1,163 mm a year.
A thirty-year average for the surrounding area, not a measurement at this address and not a flood risk on its own: a dry area floods when a storm sits over it, and a wet one may drain away perfectly well. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.2 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
The ground here sits at about 14 m above sea level and falls 70 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north-north-west, 54.1 m higher.
Because properties in the high likelihood band; 2 recorded flood outlines mapped nearby; 159 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around PL11 3HA. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Mapped flood extent | Approx. distance |
|---|---|---|
| Feb 2016 | CW9464 - Polbathic | ~0.2 km |
| Aug 2008 | CW8779 - St Germans | ~1.1 km |
These are extents the Environment Agency has mapped, not a list of every flood. Records, not floods: no outline on the record is not evidence a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 5 warnings nearby) · Ashley (2024, 5 warnings nearby) · Emma (2018, 4 warnings nearby) · Callum (2018, 3 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Tideford | River Tiddy | 2.6 km | 0.50 m | 1.15 m |
| TREBROWNBRIDGE | — | 5.4 km | — | — |
| TREBROWNBRIDGE | — | 5.4 km | — | — |
| Trebrownbridge | River Seaton | 5.4 km | 0.70 m | 1.11 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Polbathic Village Ps | Polbathic Stream(s) | 0.1 km | 16 (2024) | 28 |
| St Germans Wwtw | Polbathic Lake (estuarine) | 1.2 km | 37 (2024) | 373 |
| Lynher Pscso/eo | Polbathic Lake (e) | 1.4 km | 0 (2024) | 0 |
| Sheviock Stw So | River Lynher | 3.4 km | 11 (2024) | 15 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near PL11 3HA — all in the PL11 district.
© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the PL11 district.