Greasby Flood Risk
Greasby has a Low flood risk from rivers and the sea , with 0% of homes in a Medium or High band. The nearest gauge is 1 km away.
Greasby has 9,306 residents and 4,398 homes. Ranked 3078 of 7,114 in England for rivers and sea flood risk.
What Does Greasby's Flood Risk Classification Mean?
0% of postcodes in Greasby sit in Flood Zone 3, the planning band for land with a 1% or greater annual chance of river flooding or 0.5% or greater of sea flooding — and the map that draws it deliberately ignores flood defences.
The flood risk band for rivers and the sea is Low , with 0% of homes in a Medium or High band. Unlike the Flood Zone, the band counts the defences that are actually in place, which is why the two can describe the same street differently and both be right.
Which Postcode Districts Cover Greasby?
Each district below is one postcode district that falls inside Greasby. The band is the one shared by most of that district's postcodes, so it describes the district rather than a single street — enter a full postcode in the checker for one address. A district can cover more than one town: every district here overlaps another place, so the checker may name a neighbouring town for some of these postcodes.
| Postcode district | Postcodes here | Rivers and sea band | Surface water addresses |
|---|---|---|---|
| CH49 | 203 | Low | 563 |
| CH48 | 5 | High | 4 |
| CH61 | 2 | Not mapped — no rivers-and-sea band covers this district | not published for this district |
"Not mapped" is not "no risk". It means no rivers-and-sea band covers that district in the source — surface water can still flood it, and both Camden and Islington flooded from surface water in July 2021 while carrying no mapped rivers-and-sea band.