Table of Contents
Abandoned mine land and acid mine drainage are two of Pennsylvania’s most persistent environmental challenges — and two of the most misunderstood. This category covers the foundations: what AML and AMD are, how they form, what they do to streams and communities, and why they matter.
Start here if you are new to AML/AMD, are explaining it to others, or want a solid grounding before exploring technical or policy content.
Recommended Reading Order #
| Article | What you’ll learn |
| What is AMD? | Introduction to acid mine drainage — definition, characteristics, and where it comes from |
| How AMD is Formed | The chemistry of pyrite oxidation and how coal mining creates acidic drainage |
| Impacts of AMD | What AMD does to streams, aquatic life, water quality, and communities |
| AMD is Nonpoint Source Pollution (NPS) | How AMD is regulated and why NPS classification matters for funding and remediation |
| Mining Methods and AMD | How different coal mining methods — surface, underground, refuse piles — relate to AMD generation |
Related Resources #
- EPCAMR Acid Mine Drainage Fact Sheet — plain-language overview for community audiences (Resource Library)
- PA AML Inventory by Congressional District — scale of the problem in PA (Resource Library)
- EPCAMR What EPCAMR Does Fact Sheet — network context for new users (Resource Library)
Questions? Ask in the Forums #
Post questions about AML/AMD basics in the General Discussion forum. New to the topic and not sure where to start? Say so — the community is here to help.
| Source: AML-Connect / EPCAMR | Last Reviewed: March 2026 | Forum: /community/forums/general-discussion/ |
