---
kind: "section"
citation: "40 C.F.R. § 52.2471"
title: "40"
number: "52.2471"
heading: "Classification of regions."
url: "https://uscodex.org/cfr/40/52.2471"
---

# §52.2471. Classification of regions.


The Washington plan was evaluated on the basis of the following classifications:


## Notes

### Amendments

[81 FR 1131, Jan. 11, 2016]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[81 FR 1131, Jan. 11, 2016]