Spatial Coverage
- Howard County (Md.)2
- Kent County (Del.)2
- Kent County (Md.)2
- Loudoun County2
- Magothy Aquifer2
- Mineral County (W. Va.)2
- New Castle County (Del.)2
- Northumberland County2
- Patapsco Aquifer2
- Patapsco River (Md.)2
- Prince Georges County2
- Queen Anne County (Md.)2
- Queen Anne's County (Md.)2
- Saint Mary's County (Md.)2
- Salem County2
- Somerset County2
- Sussex County (Del.)2
- United States2
- Washington (D.C.) Region.2
- Washington County2
