Cleanest Lakes in Oklahoma
Nla Lake in Grady County leads the rankings with a water quality grade of B and 8.9 ft of clarity. Below are the top 50 cleanest monitored lakes in Oklahoma, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | Grady | B | 8.9 ft | 17.8 µg/L | 3.4 µg/L |
| 2 | Nla Lake | Logan | B | 2.8 ft | 42 µg/L | 6.4 µg/L |
| 3 | Nla Lake | Osage | B | 4.8 ft | 30.7 µg/L | 6.5 µg/L |
| 4 | Nla Lake | Comanche | B | 5.7 ft | 27.2 µg/L | 3.9 µg/L |
| 5 | Lake Texoma | Grayson | C | 4.2 ft | 34 µg/L | 13 µg/L |
| 6 | Nla Lake | Osage | C | 3.3 ft | 26.4 µg/L | 13.5 µg/L |
| 7 | Nla Lake | Okmulgee | C | 0.4 ft | 29.8 µg/L | 11.8 µg/L |
| 8 | Nla Lake | Stephens | C | 6.1 ft | 41.8 µg/L | 10.9 µg/L |
| 9 | Wes Watkins Reservoir | Pottawatomie | C | 1.8 ft | 32 µg/L | 18.2 µg/L |
| 10 | Thunderbird Lake Hog Creek | Cleveland | C | - | 33 µg/L | 17.8 µg/L |
| 11 | Lake Texoma | Bryan | C | 3.2 ft | 59 µg/L | 21 µg/L |
| 12 | Lake Thunderbird | Cleveland | C | 1.7 ft | 57 µg/L | 28 µg/L |
| 13 | Nla Lake | Haskell | C | 5.8 ft | 8500 µg/L | 3.8 µg/L |
| 14 | Nla Lake | Johnston | C | 9.3 ft | 3510.3 µg/L | 3.1 µg/L |
| 15 | Nla Lake | Grady | C | 6.5 ft | 2506.5 µg/L | 3.8 µg/L |
| 16 | Nla Lake | Osage | C | 7.2 ft | 24000 µg/L | 4.2 µg/L |
| 17 | Nla Lake | Osage | C | 1.8 ft | 15017.3 µg/L | 7 µg/L |
| 18 | Nla Lake | Payne | C | 3 ft | 49.2 µg/L | 25.1 µg/L |
| 19 | Thunderbird Lake Nature Center | Pottawatomie | C | - | 37.5 µg/L | 28.5 µg/L |
| 20 | Thunderbird Lake Fisherman'S | Cleveland | C | - | 37 µg/L | 21.4 µg/L |
| 21 | Nla Lake | Murray | D | 2.8 ft | 28000 µg/L | 11 µg/L |
| 22 | Nla Lake | Cherokee | D | 5.3 ft | 5000 µg/L | 14.6 µg/L |
| 23 | Nla Lake | Osage | D | 0.7 ft | 87000 µg/L | 17.4 µg/L |
| 24 | Nla Lake | Seminole | D | 3 ft | 24028.2 µg/L | 15.3 µg/L |
| 25 | Nla Lake | Osage | D | 2.9 ft | 15018.4 µg/L | 11.4 µg/L |
| 26 | Nla Lake | Stephens | D | 1 ft | 46000 µg/L | 16.1 µg/L |
| 27 | Nla Lake | Okmulgee | D | 0.6 ft | 150000 µg/L | 8.4 µg/L |
| 28 | Nla Lake | Cotton | D | 0.4 ft | 67000 µg/L | 10.9 µg/L |
| 29 | Nla Lake | Latimer | D | 3.4 ft | 9520.2 µg/L | 13.8 µg/L |
| 30 | Nla Lake | Osage | D | 4.8 ft | 2506 µg/L | 9 µg/L |
| 31 | Nla Lake | Payne | D | 0.7 ft | 59588.2 µg/L | 17.3 µg/L |
| 32 | Nla Lake | Tulsa | D | 3.4 ft | 52577.4 µg/L | 19.4 µg/L |
| 33 | Nla Lake | Okfuskee | D | 4.1 ft | 2511.7 µg/L | 8.6 µg/L |
| 34 | Nla Lake | Hughes | D | 1.6 ft | 79.6 µg/L | 23.2 µg/L |
| 35 | Nla Lake | Rogers | D | 1.4 ft | 85.8 µg/L | 32.8 µg/L |
| 36 | Washunga Bay Lake | Kay | D | - | 306 µg/L | 15.7 µg/L |
| 37 | Sandy Beach Lake | Osage | D | - | 308.5 µg/L | 14.7 µg/L |
| 38 | Ponca Lake A | Kay | D | - | 259.5 µg/L | 9.1 µg/L |
| 39 | Sarge Creek Lake | Kay | D | - | 425 µg/L | 7.4 µg/L |
| 40 | Osage Cove Lake | Osage | D | - | 222 µg/L | 16.9 µg/L |
| 41 | Pioneer Cover Lake | Osage | D | - | 227 µg/L | 15.4 µg/L |
| 42 | Lake Texoma | Marshall | D | 1.7 ft | 130 µg/L | 23 µg/L |
| 43 | Nla Lake | Carter | D | 1.9 ft | 8514.5 µg/L | 28.8 µg/L |
| 44 | Nla Lake | Pontotoc | D | 2.5 ft | 32000 µg/L | 20 µg/L |
| 45 | Nla Lake | Blaine | D | 1.8 ft | 35523.5 µg/L | 26.8 µg/L |
| 46 | Nla Lake | Canadian | D | 0.9 ft | 172049.2 µg/L | 33.8 µg/L |
| 47 | Nla Lake | Washita | D | 2 ft | 571.2 µg/L | 25.1 µg/L |
| 48 | Nla Lake | Osage | D | 0.5 ft | 132.7 µg/L | 24.3 µg/L |
| 49 | Coon Creek Lake | Kay | D | - | 460 µg/L | 24 µg/L |
| 50 | Nla Lake | Canadian | F | 0.7 ft | 245280.7 µg/L | 109 µg/L |