Browse lakes and reservoirs
Named lake-type waterbodies with a populated record: assessment verdicts, listed impairment causes, or a linked USGS gauge. Data updated 2026-08-17.
Waterbodies
Showing 201–250 of 1,102 starting with M
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All New Hampshire 2,233 Minnesota 1,939 Wisconsin 1,219 Florida 973 Michigan 776 Vermont 712 Massachusetts 678 New Jersey 588 South Carolina 473 Illinois 439 New York 428 Washington 385 Texas 323 Kansas 304 Maine 302 Alabama 263 Nebraska 250 Pennsylvania 246 California 195 Virginia 193 Idaho 186 South Dakota 176 North Dakota 174 Oklahoma 173 Missouri 170 Iowa 167 Oregon 167 Indiana 162 Rhode Island 126 Colorado 122 Kentucky 108 Georgia 98 Connecticut 97 North Carolina 92 Utah 84 Louisiana 74 Tennessee 73 Arkansas 69 New Mexico 58 Montana 52 Nevada 50 Delaware 46 Arizona 44 West Virginia 44 Maryland 37 Mississippi 14 Alaska 12 Wyoming 8 Ohio 7 Hawaii 2
| Waterbody | State | Status | Causes |
|---|---|---|---|
| Mascoma Lake - Crescent Beach | NH | Not Supporting | 1 |
| Mascoma Lake - Dartmouth College Beach | NH | Not Supporting | 2 |
| Mascoma Lake - Lakeview Condominium Association Beach | NH | Not Supporting | 1 |
| Mascoma Lake - Shakoma Beach | NH | Not Supporting | 2 |
| Mascoma River | NH | Not Supporting | 1 |
| Mascoma River | NH | Not Supporting | 2 |
| Mascoma River - Baltic Mills Dam Pond | NH | Not Supporting | 1 |
| Mascoma River - Glen Road Dam | NH | Not Supporting | 2 |
| Mascoma River - Plant No 1 Dam | NH | Not Supporting | 1 |
| Mascoma River - Rivermill | NH | Not Supporting | 2 |
| Mascot Pond | NH | Not Supporting | 1 |
| Mashapaug Lake (Union) | CT | Fully Supporting | 0 |
| Mashapaug Pond | RI | Not Supporting | 5 |
| Mashkenode | MN | Not Supporting | 2 |
| Mashpee Pond | MA | Not Supporting | 3 |
| Maskenthine Reservoir | NE | Not Supporting | 5 |
| Maslowski Beach, Lake Superior | WI | Not Supporting | 1 |
| Mason Brook | NH | Not Supporting | 1 |
| Mason Lake | FL | Not Supporting | 1 |
| Mason Lake | WA | Not Supporting | 2 |
| Mason Lake | WI | Not Supporting | 1 |
| Mason Pond | NH | Not Supporting | 1 |
| Masonicus Brook | NJ | Not Supporting | 4 |
| Massabesic Lake | NH | Not Supporting | 6 |
| Massapequa Lake | NY | Not Supporting | 1 |
| Massapequa Reservoir | NY | Not Supporting | 1 |
| Massapoag Lake | MA | Not Supporting | 2 |
| Massapoag Pond | MA | Not Supporting | 5 |
| Massasecum Lake | NH | Not Supporting | 3 |
| Massey's Lake (Marburg Creek Watershed Project) | GA | Fully Supporting | 0 |
| Masseys Mill Pond | DE | Fully Supporting | 0 |
| Matanzas | IL | Not Supporting | 3 |
| Matawan Creek (above Ravine Drive) | NJ | Not Supporting | 5 |
| Matawan Creek (below Ravine Drive) | NJ | Not Supporting | 10 |
| Matejcek Dam | ND | Not Supporting | 2 |
| Matilija Reservoir | CA | Not Supporting | 1 |
| Matt Warner Reservoir | UT | Not Supporting | 5 |
| Mattawamkeag River (1) | ME | Fully Supporting | 0 |
| Mattawamkeag River (2) | ME | Fully Supporting | 0 |
| Mattawamkeag River (2) | ME | Fully Supporting | 0 |
| Mattawamkeag River (3) | ME | Fully Supporting | 0 |
| Matteson Lake | MI | Not Supporting | 4 |
| Matthews Lake | WI | Fully Supporting | 0 |
| Mattituck (Marratooka) Pond | NY | Not Supporting | 6 |
| Mattix Run (Nacote Creek) | NJ | Not Supporting | 3 |
| Mattoon | IL | Not Supporting | 5 |
| Mattoon Lake | WA | Not Supporting | 1 |
| Mauch Chunk Lake-02040106001325 | PA | Fully Supporting | 0 |
| Maud | MN | Not Supporting | 1 |
| Maud Lake | ID | Fully Supporting | 0 |
Source: EPA ATTAINS and USGS National Water Information System State Integrated Report assessment decisions + USGS daily values · 2026