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 1–50 of 157 starting with U
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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 |
|---|---|---|---|
| Uchee Creek (Walter F. George Lake) | AL | Not Supporting | 1 |
| Uff | MN | Not Supporting | 1 |
| Uhlenkolts | MN | Not Supporting | 1 |
| Ulrich Dam | NH | Not Supporting | 1 |
| Umbagog Lake Drainage | ME | Fully Supporting | 0 |
| Umbagog Lake Drainage | ME | Fully Supporting | 0 |
| Umcolcus Stream | ME | Fully Supporting | 0 |
| Umcolcus Stream | ME | Fully Supporting | 0 |
| Unamed Lake - Canyon Creek | ID | Fully Supporting | 0 |
| Unamed Lake to Fish Hook Creek Tributary | ID | Fully Supporting | 0 |
| Unanmed Brook - Trib to Dodge Brook | NH | Not Supporting | 1 |
| Unanmed Brook - Trib to Dodge Brook | NH | Not Supporting | 1 |
| Uncanoonuc Lake | NH | Not Supporting | 1 |
| Uncanoonuc Lake - Mountain Base Beach | NH | Not Supporting | 1 |
| Uncas Pond | MA | Not Supporting | 2 |
| Uncas Pond (Lyme) | CT | Fully Supporting | 0 |
| Uncle Harvey Pond | MA | Not Supporting | 1 |
| Underpass | VT | Fully Supporting | 0 |
| Underwood Lake | WI | Fully Supporting | 0 |
| Underwood Lake-02040101001417 | PA | Fully Supporting | 0 |
| Unicoi Lake | GA | Fully Supporting | 0 |
| Unicoi State Park Day Use Beach | GA | Fully Supporting | 0 |
| Union | MN | Not Supporting | 1 |
| Union | MN | Not Supporting | 1 |
| Union | MN | Not Supporting | 1 |
| Union Branch (below Blacks Br 74d22m05s) | NJ | Not Supporting | 7 |
| Union Church trib | NJ | Not Supporting | 2 |
| Union City Reservoir-05010004001534 | PA | Not Supporting | 1 |
| Union Grove Lake | IA | Not Supporting | 4 |
| Union Lake | MI | Not Supporting | 3 |
| Union Lake | MI | Not Supporting | 4 |
| Union Lake / Lake Washington Ship Canal | WA | Not Supporting | 9 |
| Union Meadows | NH | Not Supporting | 1 |
| Union Pacific Lake (Sra) | NE | Not Supporting | 1 |
| Union Pond (Manchester) | CT | Not Supporting | 4 |
| Union River Bay | ME | Fully Supporting | 0 |
| Unionville Pond | MA | Not Supporting | 2 |
| Unionville Reservoir | MO | Not Supporting | 1 |
| Unity Lake Number Two | MO | Not Supporting | 1 |
| Unity P | ME | Not Supporting | 3 |
| Unity Reservoir | OR | Not Supporting | 2 |
| University Lake | AK | Not Supporting | 1 |
| Unknown (Avygor) | VT | Not Supporting | 1 |
| Unknown (Braint) | VT | Fully Supporting | 0 |
| Unknown (Ferdnd) | VT | Not Supporting | 1 |
| Unknown Pond | NH | Not Supporting | 2 |
| Unknown Pond | NH | Not Supporting | 1 |
| Unknown Pond - Camp Glen Brook Beach | NH | Not Supporting | 1 |
| Unknown River - Aversa Dam | NH | Not Supporting | 1 |
| Unknown River - Daley Dam | NH | Not Supporting | 1 |
Source: EPA ATTAINS and USGS National Water Information System State Integrated Report assessment decisions + USGS daily values · 2026