---
kind: "section"
citation: "40 C.F.R. § 52.04"
title: "40"
number: "52.04"
heading: "Classification of regions."
url: "https://uscodex.org/cfr/40/52.04"
---

# §52.04. Classification of regions.


Each subpart sets forth the priority classification, by pollutant, for each region in the State. Each plan for each region was evaluated according to the requirements of [part 51](/cfr/40/part51.md) of this chapter applicable to regions of that priority.


## Notes

### Source

Source: 37 FR 10846, May 31, 1972, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Amendments

[40 FR 5521, Feb. 6, 1975]