What is the cleanest lake in Oklahoma?

Lake Thunderbird in Cleveland County has the cleanest nutrient and algae readings in Oklahoma, with 0.3 feet of measured water clarity.

How are these rankings calculated?

Nutrients and algae, total phosphorus, nitrogen, chlorophyll-a and turbidity, are read against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown separately. Lakes without enough recent samples are listed without a condition class rather than ranked low. Source data comes from the EPA Water Quality Portal.

Lakes With Algae Readings in Oklahoma

6 lakes in Oklahoma report elevated algae levels (chlorophyll-a above 20 µg/L). These lakes are most likely to develop blue-green algae blooms during warm, calm summer weather. Avoid swimming during visible blooms and rinse pets after contact.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Lake Texoma	Johnston	0.3 ft	-	233 µg/L
2	Lake Thunderbird	Cleveland	1.7 ft	59 µg/L	28.7 µg/L
3	Thunderbird Lake Nature Center	Pottawatomie	-	37.5 µg/L	28.5 µg/L
4	Coon Creek Lake	Kay	-	359 µg/L	24 µg/L
5	Lake Texoma	Marshall	1.7 ft	142 µg/L	23 µg/L
6	Thunderbird Lake Fisherman'S	Cleveland	-	31.5 µg/L	21.4 µg/L

Ranked List

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