---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchD/part149"
level: "part"
label: "Part 149"
heading: "Sole Source Aquifers"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchD-part149"
sections_count: 15
---

# Part 149 — Sole Source Aquifers

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter D — Water Programs

## Contents

- [Subpart A — Criteria for Identifying Critical Aquifer Protection Areas](/cfr/40/chI-subchD-part149-subpartA.md)
- [Subpart B — Review of Projects Affecting the Edwards Underground Reservoir, A Designated Sole Source Aquifer in the San Antonio, Texas Area](/cfr/40/chI-subchD-part149-subpartB.md)