Blaenavon Flood Risk
Blaenavon has a Low flood risk from rivers and the sea , with 5% of homes in a Medium or High band.
Blaenavon has 5,646 residents and 2,526 homes. Ranked 101 of 621 in Wales for rivers and sea flood risk.
What Does Blaenavon's Flood Risk Classification Mean?
3.3% of postcodes in Blaenavon 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 5% 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 Blaenavon?
Each district below is one postcode district that falls inside Blaenavon. 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 |
|---|---|---|---|
| NP4 | 181 | Low | not published for this district |