Reading the Air
US EPA Scale
0–50Good
51–100Moderate — Sacramento is here now
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous
Current Pollutants
µg/m³
PM2.5 — fine particles5.4
PM10 — coarse particles7.3
NO₂ — nitrogen dioxide2.6
O₃ — ozone80.0