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 10,201–10,250 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 |
|---|---|---|---|
| Ocoee Number 3 Reservoir | TN | Not Supporting | 3 |
| Oconee Lake | GA | Fully Supporting | 0 |
| Oconee Lake | GA | Fully Supporting | 0 |
| Oconee Lake | GA | Fully Supporting | 0 |
| Oconomowoc Lake | WI | Fully Supporting | 0 |
| Octoraro Lake-02050306002281 | PA | Not Supporting | 1 |
| Odell Lake | OR | Not Supporting | 5 |
| Odessa Lake (Old) | MO | Not Supporting | 1 |
| Odiorne Pond | NH | Not Supporting | 2 |
| Odland Dam | ND | Fully Supporting | 0 |
| Offutt Lake | NE | Not Supporting | 1 |
| Offutt Lake | WA | Not Supporting | 1 |
| Ogallala City Park Lake | NE | Not Supporting | 1 |
| Ogden City Lake | KS | Not Supporting | 1 |
| Ogishkemuncie | MN | Not Supporting | 1 |
| Ogontz Brook | NH | Not Supporting | 1 |
| Ogontz Lake | NH | Not Supporting | 1 |
| Ogontz Lake - Ogontz Equestrian Ctr/Camp Beach | NH | Not Supporting | 1 |
| Ogrens | MN | Not Supporting | 1 |
| Ohio St. Beach | IL | Not Supporting | 3 |
| Ohop Lake | WA | Not Supporting | 3 |
| Oiger Ponds | CA | Not Supporting | 1 |
| Oilmont Wetland | MT | Not Supporting | 3 |
| Ojibway | MN | Not Supporting | 2 |
| Okabena | MN | Not Supporting | 1 |
| Okamanpeedan | MN | Not Supporting | 1 |
| Okatuppa Creek (Coffeeville Lake) | AL | Fully Supporting | 0 |
| Okauchee Lake | WI | Not Supporting | 1 |
| Okeeheelee Park | FL | Fully Supporting | 0 |
| Okemah Lake | OK | Not Supporting | 1 |
| Okmulgee Lake | OK | Not Supporting | 2 |
| Olamon Stream | ME | Fully Supporting | 0 |
| Olamon Stream | ME | Fully Supporting | 0 |
| Olathe Waterworks Lakes | KS | Not Supporting | 1 |
| Old Alexandria Reservoir | KY | Not Supporting | 1 |
| Old Elk Lake | WI | Not Supporting | 2 |
| Old Hickory Reservoir | TN | Fully Supporting | 0 |
| Old Lake | IN | Fully Supporting | 0 |
| Old Lake | MO | Not Supporting | 3 |
| Old Lake Davenport | FL | Not Supporting | 1 |
| Old Maids Brook - Mclaughlin Dam | NH | Not Supporting | 1 |
| Old Maids Brook - Spit Brook | NH | Not Supporting | 1 |
| Old Man Lakes | ID | Fully Supporting | 0 |
| Old Marsh | VT | Fully Supporting | 0 |
| Old Marsh | VT | Fully Supporting | 0 |
| Old Mill | IL | Not Supporting | 2 |
| Old Miller Pond Dam | NH | Not Supporting | 1 |
| Old Millpond | NH | Not Supporting | 1 |
| Old Oak | IL | Not Supporting | 1 |
| Old Oaken Bucket Pond | MA | Not Supporting | 3 |
Source: EPA ATTAINS and USGS National Water Information System State Integrated Report assessment decisions + USGS daily values · 2026