Flood Risk In Norfolk

2% of homes in Norfolk are in a Medium or High flood risk band, across 451,699 dwellings. It ranks 9 of 21 English counties.

Rivers and the sea Very low less than a 0.1% chance in any year

Surface water 34,162 addresses at risk that rivers and sea does not explain — a minimum, not a total

Groundwater Not mapped No national band is published for this source

Reservoirs Not mapped No national band is published for this source

The county band is the aggregate of its 7 districts: 1,837 homes at High, 7,269 at Medium, 13,206 at Low and 18,835 at Very Low — summing to the 41,147 homes at risk this page opens with.

Towns In Norfolk, Ranked By Flood Risk

1 Great Yarmouth Low 3% of homes at Medium or High
2 Gorleston-on-Sea Very low 1.1% of homes at Medium or High
3 Aylsham High 1% of homes at Medium or High
4 King's Lynn Low 1% of homes at Medium or High
5 Norwich Low 0.4% of homes at Medium or High
6 Diss Low 0.4% of homes at Medium or High
7 Thetford Low 0.4% of homes at Medium or High
8 Dereham Medium 0.2% of homes at Medium or High
9 North Walsham Low 0.1% of homes at Medium or High
10 Caister-on-Sea Low 0.1% of homes at Medium or High
11 Bradwell (Great Yarmouth) Very low 0% of homes at Medium or High
12 Fakenham Low 0% of homes at Medium or High
13 Attleborough Not mapped 0% of homes at Medium or High
14 Cromer Not mapped 0% of homes at Medium or High
15 Downham Market Not mapped 0% of homes at Medium or High
16 Hemsby Very low 0% of homes at Medium or High
17 Hethersett Not mapped 0% of homes at Medium or High
18 Poringland Not mapped 0% of homes at Medium or High
19 Sheringham Not mapped 0% of homes at Medium or High
20 Swaffham Not mapped 0% of homes at Medium or High
21 Taverham and Drayton Low 0% of homes at Medium or High
22 Watton Low 0% of homes at Medium or High
23 Wymondham (South Norfolk) Low 0% of homes at Medium or High

Ranked within England only. Each town's figure counts its own homes, so the shares are comparable with each other but not with towns in Scotland, Wales or Northern Ireland.

Which Rivers Run Through Norfolk?

Rivers with a gauged station in one of the towns ranked above. Each river page carries every gauge on it and the live level at each.

River Waveney levels 7 gauging stations on this river
River Thet levels 4 gauging stations on this river
River Wensum levels 3 gauging stations on this river
River Tiffey levels 1 gauging station on this river

How Does Norfolk Compare With Other English Counties?

Norfolk ranks 9 of 21 English counties for the share of homes in a Medium or High flood risk band. That is above the median county, at 1.8%. The comparison covers the 21 shire counties only — the 132 unitary authorities, including Bristol, York and Sheffield, have no county above them and so take no rank here.

A county figure is an aggregate of its districts, and districts differ sharply: a fenland district and an upland one in the same county can sit at opposite ends of the national ranking. Compare the towns above rather than the county total where it matters.

Share of homes in a Medium or High band, from the Environment Agency's national assessment. The method · The national picture