# US EPA finalized stronger annual PM2.5 NAAQS, lowering primary standard to 9.0 µg/m³

Date: 2024

_No public text on this fact yet._

## Drivers

- Air Pollution: https://factrail.ai/drivers/air-pollution

## Sources

_Sources are listed on the canonical page._

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/epa-pm25-naaqs-final-2024