Safety, air quality and noise in Bolton

Clean air — higher is cleaner

Bolton scores 67 out of 100 for clean air, where higher is cleaner.

Measured figure: 10.3 micrograms per cubic metre PM2.5 annual mean.

Clean air uses a median of 10.3 micrograms per cubic metre of PM2.5 across the 81 LSOAs in this local authority area, an annual mean modelled at 81 member-area centroids from SpotCheck's city air-quality model.

Median across the 81 member areas; middle half 65 to 70.

Quiet — higher is quieter

Bolton scores 45 out of 100 for quiet, where higher is quieter.

Measured figure: 61.9 decibels (modelled).

Quiet uses a median of 61.9 decibels of modelled outdoor sound across the 81 LSOAs in this local authority area, a day-evening-night level taken at 81 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 81 member areas; middle half 26 to 51.