Spatial Coverage
- Hudson River (N.Y. and N.J.)1
- Humboldt River Watershed1
- Hungary1
- Hungary.1
- Huron Pines Resource Conservation and Development Area (Mich.)1
- Indiana1
- Ipswich Bay (Mass.)1
- Iron County1
- Israel1
- Italy.1
- Jamaica Bay (N.Y.)1
- Jefferson City Region1
- John H. Kerr Reservoir Region (Va. and N.C.)1
- Kansas1
- Katmai National Park and Preserve Region1
- Kennebec River (Me.)1
- Kern County1
- King County1
- Kingston (Town)1
- Kingston Bay (Mass.)1
