---
kind: "section"
citation: "40 C.F.R. § 146.51"
title: "40"
number: "146.51"
heading: "Applicability."
url: "https://uscodex.org/cfr/40/146.51"
---

# §146.51. Applicability.


This subpart sets forth criteria and standards for underground injection control programs to regulate all injection not regulated in subparts B, C, D, and E.

- (a) Generally, wells covered by this subpart inject non-hazardous fluids into or above formations that contain underground sources of drinking water. It includes all wells listed in [§ 146.5(e)](/cfr/40/146.5.md?p=e) but is not limited to those types of injection wells.
- (b) It also includes wells not covered in Class IV that inject radioactive material listed in [10 CFR part 20](/cfr/10/part20.md), appendix B, table II, column 2.

## Notes

### Amendments

[45 FR 42500, June 24, 1980, as amended at 47 FR 5001, Feb. 3, 1982]

### Authority

Authority: Safe Drinking Water Act, 42 U.S.C. 300f et seq.; Resource Conservation and Recovery Act, 42 U.S.C. 6901 et seq.

### Source

Source: 45 FR 42500, June 24, 1980, unless otherwise noted.

### Amendments

[45 FR 42500, June 24, 1980, as amended at 47 FR 5001, Feb. 3, 1982]