Flood Risk In West Sussex

2% of homes in West Sussex are in a Medium or High flood risk band, across 409,564 dwellings. It ranks 10 of 21 English counties.

Rivers and the sea Low a 0.1% to 1% chance in any year

Surface water 33,534 addresses at risk that rivers and sea does not explain — a minimum, not a total

Groundwater Not mapped 10 postcodes here are in a groundwater alert area; no likelihood band is published

Reservoirs Not mapped No national band is published for this source

The county band is the aggregate of its 7 districts: 5,381 homes at High, 2,710 at Medium, 12,712 at Low and 4,076 at Very Low — summing to the 24,879 homes at risk this page opens with.

Towns In West Sussex, Ranked By Flood Risk

1 East Wittering High 25% of homes at Medium or High
2 Selsey High 22.8% of homes at Medium or High
3 Wick (Arun) High 7.2% of homes at Medium or High
4 Barnham (Arun) Low 6% of homes at Medium or High
5 Shoreham-by-Sea Low 3.4% of homes at Medium or High
6 Copthorne Low 3.3% of homes at Medium or High
7 Worthing High 3% of homes at Medium or High
8 Littlehampton Low 2% of homes at Medium or High
9 Rustington High 1.9% of homes at Medium or High
10 Crawley (Crawley) Low 1.7% of homes at Medium or High
11 Hassocks and Hurstpierpoint Low 1.4% of homes at Medium or High
12 Lancing and Sompting Low 1.2% of homes at Medium or High
13 Storrington High 1% of homes at Medium or High
14 Midhurst Medium 0.7% of homes at Medium or High
15 Bognor Regis Very low 0.6% of homes at Medium or High
16 Haywards Heath Low 0.4% of homes at Medium or High
17 Billingshurst Low 0.3% of homes at Medium or High
18 Steyning Low 0.1% of homes at Medium or High
19 Chichester Low 0.1% of homes at Medium or High
20 Burgess Hill High 0% of homes at Medium or High
21 East Grinstead Low 0% of homes at Medium or High
22 Broadbridge Heath Not mapped 0% of homes at Medium or High
23 Crawley Down Not mapped 0% of homes at Medium or High
24 Henfield Low 0% of homes at Medium or High
25 Horsham Low 0% of homes at Medium or High
26 Southwater Not mapped 0% of homes at Medium or High
27 Southwick (Adur) Low 0% of homes at Medium or High
28 Yapton 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 West Sussex?

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 Arun levels 8 gauging stations on this river
River Lavant levels 4 gauging stations on this river
River Rother levels 4 gauging stations on this river

How Does West Sussex Compare With Other English Counties?

West Sussex ranks 10 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