| Abbreviation | Definition |
|---|---|
| PDEIA | Public disclosure of environmental impact assessments for proposed projects or plans is limited |
| PDR | Partial Depth Recycling |
| PE | Populations Ecosystem |
| PEA | Public Environmental Analysis |
| PEACH | People for Environmental Action and Community Health |
| PEAK | Pathway To Environmental Awareness And Knowledge |
| PEAK | Promoting Environmental Awareness in Kids |
| PEAT | Progressive Environmental Agricultural Technologies |
| PEAT | Progressive Environmental and Agricultural Technologies |
| PEC | Pennsylvania Environmental Council |
| PEC | Piedmont Environmental Council |
| PEC | Potential Ecological Condition |
| PEC | Practical Environmental Consultants |
| PEC | Predicted Environmental Concentration |
| PEC | Predicted Environmental Concentrations |
| PEC | The Predicted Environmental Concentration |
| PECE | Partners for Environmental Cooperation in Europe |
| PEDF | Pennsylvania Environmental Defense Foundation |
| PEEC | Pacific Environmental Education Center |
| PEEC | Pajarito Environmental Education Center |