Home Rankings PM2.5 Annual Mean
PM2.5 Annual Mean
Unit: µg/m³ · Direction: lower is better
Annual mean PM2.5 (fine particulate matter, µg/m³) computed from AirNow + EPA AQS monitoring stations within each CBSA. Values reflect monitored ambient concentrations; reporting areas may not cover the entire CBSA.
Ranked metros
No metros have ranked values yet — every row is pending data (see below).
Data pending
These metros are in the CBSA universe but do not yet have a ranked value — the upstream connector has not produced data, or the sample size is below the threshold. Rule 5 (graceful status): pending rows remain visible rather than being silently dropped.
- Houston-The Woodlands-Sugar Land · TX pending
- Los Angeles-Long Beach-Anaheim · CA pending
- New York-Newark-Jersey City · NY pending
Methodology & sources
Source: EPA AirNow / AQS
Definition: Annual mean PM2.5 (fine particulate matter, µg/m³) computed from AirNow + EPA AQS monitoring stations within each CBSA. Values reflect monitored ambient concentrations; reporting areas may not cover the entire CBSA.
Cadence: Annual (refreshed when new validated monitor-year aggregates are posted).