# Environment in Bristol The north east of the South West. 495,260 people (mid-2025 estimate) in 109 square kilometres. 9 layers about environment for Bristol, each at the level its publisher released it, with its own date and source. In: [South West](https://openindex.co.uk/south-west) ## Radon potential 1 km grid level. Source: BGS and UKHSA. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/radon?place=E06000023) · [Source and method](https://openindex.co.uk/sources/radon) · https://openindex.co.uk/bristol/environment#l-radon-potential ## Road and rail noise by postcode Postcode level, England only. Source: Defra and ONS Postcode Directory. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/noise-by-postcode?place=E06000023) · [Source and method](https://openindex.co.uk/sources/noise-by-postcode) · https://openindex.co.uk/bristol/environment#l-noise-postcode ## People in radon Affected Area squares Bristol: **92%** (2022, council level). Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. About 92% of people in Bristol live in a 1 km square that the radon atlas marks as a radon Affected Area. Across the UK the figure is 44%. - Against South West: 35% higher (68%) - Against the UK: 2.1 times (44%) [Map](https://openindex.co.uk/map/radon-affected-areas?place=E06000023) · [Source and method](https://openindex.co.uk/sources/radon-affected-areas) · [Ranking](https://openindex.co.uk/rankings/radon-affected-areas/south-west) · https://openindex.co.uk/bristol/environment#l-radon-affected-share ## People in loud road or rail noise Bristol: **4.0%** (2021, council level, England only). Source: Worked out by Open Index from Defra's strategic noise maps and census output areas. Published 8 December 2023. About 4.0% of people in Bristol live where road or rail noise is modelled at 65 decibels or more. - Against South West: 1.8 times (2.2%) - Against the UK: 11% higher (3.6%) [Map](https://openindex.co.uk/map/loud-transport-noise?place=E06000023) · [Source and method](https://openindex.co.uk/sources/loud-transport-noise) · [Ranking](https://openindex.co.uk/rankings/loud-transport-noise/south-west) · https://openindex.co.uk/bristol/environment#l-noise-loud-share ## Nitrogen dioxide (NO2) 1 km grid level. Source: Defra. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/nitrogen-dioxide?place=E06000023) · [Source and method](https://openindex.co.uk/sources/nitrogen-dioxide) · https://openindex.co.uk/bristol/environment#l-air-no2 ## Fine particles (PM2.5) 1 km grid level. Source: Defra. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/fine-particles?place=E06000023) · [Source and method](https://openindex.co.uk/sources/fine-particles) · https://openindex.co.uk/bristol/environment#l-air-pm25 ## Green space Outline level, Great Britain only. Source: Ordnance Survey. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/green-space?place=E06000023) · [Source and method](https://openindex.co.uk/sources/green-space) · https://openindex.co.uk/bristol/environment#l-green-space ## Flood zones Outline level, England and Wales only. Source: Environment Agency and Natural Resources Wales. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/flood-zones?place=E06000023) · [Source and method](https://openindex.co.uk/sources/flood-zones) · https://openindex.co.uk/bristol/environment#l-flood-zones ## Flood risk by postcode Postcode level, England only. Source: Environment Agency and ONS Postcode Directory. Published as points, so there is no single figure for Bristol. The map shows each one. [Map](https://openindex.co.uk/map/flood-risk-by-postcode?place=E06000023) · [Source and method](https://openindex.co.uk/sources/flood-risk-by-postcode) · https://openindex.co.uk/bristol/environment#l-flood-risk-postcode ## More on this place - [Overview](https://openindex.co.uk/bristol) - [Housing](https://openindex.co.uk/bristol/housing) (17) - [Crime](https://openindex.co.uk/bristol/crime) (13) - [People](https://openindex.co.uk/bristol/people) (24) - [Deprivation](https://openindex.co.uk/bristol/deprivation) (8) - [Health](https://openindex.co.uk/bristol/health) (4) - [Education](https://openindex.co.uk/bristol/education) (2) - [Transport](https://openindex.co.uk/bristol/transport) (4) - [Connectivity](https://openindex.co.uk/bristol/connectivity) (5) - [Planning](https://openindex.co.uk/bristol/planning) (3) - [Economy](https://openindex.co.uk/bristol/economy) (4) - [Council tax](https://openindex.co.uk/bristol/council-tax) (10) - [Elections](https://openindex.co.uk/bristol/elections) (7) - [Local services](https://openindex.co.uk/bristol/services) (3) - [Sources](https://openindex.co.uk/bristol/sources) (28) The same figures as JSON: https://openindex.co.uk/v1/places/E06000023/data?family=environment ## How to cite Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/bristol/environment, or to one figure with its anchor, https://openindex.co.uk/bristol/environment#l-radon-potential. Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it. Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/bristol/environment