---
kind: "section"
citation: "40 C.F.R. § 52.1521"
title: "40"
number: "52.1521"
heading: "Classification of regions."
url: "https://uscodex.org/cfr/40/52.1521"
---

# §52.1521. Classification of regions.


The New Hampshire plan was evaluated on the basis of the following classifications:


## Notes

### Amendments

[37 FR 10879, May 31, 1972, as amended at 45 FR 24876, Apr. 11, 1980; 80 FR 78141, Dec. 16, 2015; 81 FR 44554, July 8, 2016]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[37 FR 10879, May 31, 1972, as amended at 45 FR 24876, Apr. 11, 1980; 80 FR 78141, Dec. 16, 2015; 81 FR 44554, July 8, 2016]