Pollutant Standards Index

The Pollutant Standards Index (PSI) is based on five pollutants: 1. Particulate Matter (PM10) 2. Ozone 3. Sulphur Dioxide 4. Carbon Monoxide 5. Nitrogen Dioxide Each pollutant has a sub-index calculated from a segmented linear function that transforms ambient concentrations onto a scale extending from 0 through 500. The overall…