Safety, air quality and noise in Norwich

Safety — higher is safer

Norwich scores 91 out of 100 for safety, where higher is safer.

Measured figure: 18.2 violent offences per 10,000 residents.

Safety uses a median of 18.2 violent offences per 10,000 residents across this area's Census tracts, each tract carrying the FBI-reported rate of its nearest reporting agency (4 agencies in all), from FBI Uniform Crime Reporting, latest published year, where each agency's rate is jurisdiction-wide, not a neighbourhood figure.

Median across the 36 member areas; middle half 88 to 100.

Clean air — higher is cleaner

Norwich scores 62 out of 100 for clean air, where higher is cleaner.

Measured figure: 11.4 micrograms per cubic metre PM2.5 annual mean.

Clean air uses a median of 11.4 micrograms per cubic metre of PM2.5 across the 36 Tracts in this city, an annual mean modelled at 36 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 36 member areas; middle half 61 to 63.

Quiet — higher is quieter

Norwich scores 42 out of 100 for quiet, where higher is quieter.

Measured figure: 63.1 decibels (modelled).

Quiet uses a median of 63.1 decibels of modelled outdoor sound across the 36 Tracts in this city, a day-evening-night level taken at 36 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 36 member areas; middle half 31 to 61.