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 10,351–10,400 of 15,611
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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 |
|---|---|---|---|
| Oswego Lake | IN | Not Supporting | 1 |
| Oswego Lake | WI | Fully Supporting | 0 |
| Oswego River (above Rt 539) | NJ | Not Supporting | 3 |
| Oswego River (Andrews Rd to Sim Place Resv) | NJ | Not Supporting | 2 |
| Oswego River (below Andrews Road) | NJ | Not Supporting | 1 |
| Otay Reservoir, Lower | CA | Not Supporting | 8 |
| Otis Creek Lake (Eureka) | KS | Fully Supporting | 0 |
| Otis Reservoir | MA | Not Supporting | 1 |
| Otisco Lake | NY | Not Supporting | 1 |
| Otsego Lake | MI | Not Supporting | 1 |
| Ottawa Co. SFL | KS | Not Supporting | 3 |
| Ottawa Lake | MI | Not Supporting | 3 |
| Ottawa Lake | WI | Fully Supporting | 0 |
| Otter | IL | Not Supporting | 2 |
| Otter | MN | Not Supporting | 1 |
| Otter | MN | Not Supporting | 1 |
| Otter Brook | NH | Not Supporting | 1 |
| Otter Brook | NH | Not Supporting | 1 |
| Otter Brook | NH | Not Supporting | 1 |
| Otter Brook | NH | Not Supporting | 1 |
| Otter Brook - Branch River | NH | Not Supporting | 1 |
| Otter Brook - Otter Brook at Woods Mill | NH | Not Supporting | 1 |
| Otter Brook Lake - Otter Brook Pk Beach | NH | Not Supporting | 2 |
| Otter Brook Pool | NH | Not Supporting | 1 |
| Otter Creek Lake | IA | Not Supporting | 2 |
| Otter Creek Reservoir | UT | Not Supporting | 3 |
| Otter Lake | FL | Not Supporting | 1 |
| Otter Lake | MI | Not Supporting | 2 |
| Otter Lake | MI | Not Supporting | 1 |
| Otter Lake | NH | Not Supporting | 3 |
| Otter Lake | WI | Not Supporting | 1 |
| Otter Lake | WI | Fully Supporting | 0 |
| Otter Lake (Brown) | WI | Not Supporting | 1 |
| Otter Lake - Camp Union Beach | NH | Not Supporting | 1 |
| Otter Lake - Greenfield Sp Beach | NH | Not Supporting | 1 |
| Otter Lake - Greenfield Sp Camping Beach | NH | Not Supporting | 2 |
| Otter Lake - Greenfield Sp Middle Beach | NH | Not Supporting | 2 |
| Otter Lake - Greenfield Sp Picnic Beach | NH | Not Supporting | 2 |
| Otter P | ME | Not Supporting | 1 |
| Otter Pond | NH | Not Supporting | 1 |
| Otter Pond | NH | Not Supporting | 2 |
| Otter Pond | NY | Not Supporting | 2 |
| Otter Pond | NY | Not Supporting | 1 |
| Otter Pond - Morgan Beach | NH | Not Supporting | 2 |
| Otter Tail | MN | Not Supporting | 1 |
| Otternick Pond | NH | Not Supporting | 5 |
| Ottertrack | MN | Not Supporting | 1 |
| Otto | MN | Not Supporting | 1 |
| Ottumwa Lagoon | IA | Not Supporting | 2 |
| Otumba Park Beach | WI | Not Supporting | 1 |
Source: EPA ATTAINS and USGS National Water Information System State Integrated Report assessment decisions + USGS daily values · 2026