Safety, air quality and noise in Rapid City

Safety — higher is safer

Rapid City scores 2.9 out of 10 for safety, where higher is safer.

Measured figure: 74.2 violent offences per 10,000 residents.

Safety uses a median of 74.2 violent offences per 10,000 residents across this area's Census tracts, each tract carrying the FBI-reported rate of its nearest reporting agency (3 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 27 member areas; middle half 2.9 to 2.9.

Clean air — higher is cleaner

Rapid City scores 6.7 out of 10 for clean air, where higher is cleaner.

Measured figure: 10.4 micrograms per cubic metre PM2.5 annual mean.

Clean air uses a median of 10.4 micrograms per cubic metre of PM2.5 across the 27 Tracts in this city, an annual mean modelled at 27 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 27 member areas; middle half 6.6 to 6.7.

Quiet — higher is quieter

Rapid City scores 4.8 out of 10 for quiet, where higher is quieter.

Measured figure: 61.0 decibels (modelled).

Quiet uses a median of 61 decibels of modelled outdoor sound across the 27 Tracts in this city, a day-evening-night level taken at 27 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 27 member areas; middle half 3.4 to 8.4.