Environment in Southend-on-Sea
Unitary authorityThe south east of the East of England. 185,214 people (mid-2025 estimate) in 42 square kilometres.
9 layers about environment for Southend-on-Sea, each at the level its publisher released it, with its own date and source.
Radon Affected Area by ward
Worked out by Open Index · 2022
All 17 of Southend-on-Sea’s wards have the same figure: 0%.
Radon potential
1 km gridPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
Road and rail noise by postcode
PostcodeEngland onlyPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
People in radon Affected Area squares
CouncilAbout 0% of people in Southend-on-Sea live in a 1 km square that the radon atlas marks as a radon Affected Area.
Across the UK the figure is 44%.
Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas.
- Against East of England
- 100% lower22%
- Against the UK
- 100% lower44%
People in loud road or rail noise
CouncilEngland onlyAbout 3.9% of people in Southend-on-Sea live where road or rail noise is modelled at 65 decibels or more.
Worked out by Open Index from Defra's strategic noise maps and census output areas.
- Against East of England
- 1.9 times2.1%
- Against the UK
- 8% higher3.6%
Nitrogen dioxide (NO2)
1 km gridPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
Fine particles (PM2.5)
1 km gridPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
Green space
OutlineGreat Britain onlyPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
Flood zones
OutlineEngland and Wales onlyPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.
Flood risk by postcode
PostcodeEngland onlyPublished as points, so there is no single figure for Southend-on-Sea. The map shows each one.