# Particulate Matter Air Quality Standards: Background and Current Developments
> **Long Report (Legacy)** · 2005-01-10 · `RL31531`
## Report
- **CRS ID:** RL31531
- **Series:** Long Report (Legacy)
- **Publication date:** 2005-01-10
## Documents
- [PDF](https://www.everycrsreport.com/files/20050110_RL31531_22b3ea88131ddb75d084677154c8125abee568e0.pdf)
- [HTML](https://www.everycrsreport.com/files/20050110_RL31531_22b3ea88131ddb75d084677154c8125abee568e0.html)
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