Reading the Air
US EPA Scale
0–50Good — Sacramento is here now
51–100Moderate
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous
Current Pollutants
µg/m³
PM2.5 — fine particles6.1
PM10 — coarse particles7.9
NO₂ — nitrogen dioxide4.4
O₃ — ozone41.0