Safety, air quality and noise in Colchester

Safety — higher is safer

Colchester scores 100 out of 100 for safety, where higher is safer.

Measured figure: 464.0 offences per 10,000 residents.

Safety uses a median of 464 offences per 10,000 residents across the 15 LSOAs in this local authority area, from Home Office police-recorded crime published through data.police.uk, 2025.

Median across the 15 member areas; middle half 98 to 100.

Clean air — higher is cleaner

Colchester scores 77 out of 100 for clean air, where higher is cleaner.

Measured figure: 8.1 micrograms per cubic metre PM2.5 annual mean.

Clean air uses a median of 8.1 micrograms per cubic metre of PM2.5 across the 15 LSOAs in this local authority area, an annual mean modelled at 15 member-area centroids from the Copernicus CAMS regional background surface. This figure is approximate: a regional background estimate rather than a local modelled surface.

This score is approximate.

Median across the 15 member areas; middle half 71 to 82.

Quiet — higher is quieter

Colchester scores 61 out of 100 for quiet, where higher is quieter.

Measured figure: 55.8 decibels (modelled).

Quiet uses a median of 55.8 decibels of modelled outdoor sound across the 15 LSOAs in this local authority area, a day-evening-night level taken at 15 member-area centroids from the national major-road traffic noise model, where a lower reading means a quieter area. This figure is approximate: modelled from the major-road network rather than a local noise surface.

This score is approximate.

Median across the 15 member areas; middle half 29 to 72.