Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Pinellas County Lake Quality

Florida, 46 lakes, measured by Florida DEP

The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. 30 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Pinellas County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Pinellas-Hewitt Lake has the lowest nutrient and algae readings in the county.

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Quick Answers for Pinellas County

Cleanest lakes in Pinellas County →Cleanest lakes in Florida →Best swimming lakes in Florida →

Planning a trip? Check special fishing regulations for Pinellas-Hewitt Lake — or check the official Florida fishing regulations.

All Lakes in Pinellas County

46 lakes · 30 ranked on readings, 16 without enough sampling30 lakes ranked on readings · 16 without enough sampling, hidden

Include not-rated lakes (16)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Access
1	Pinellas-Hewitt LakePinellas	5 ft	16 µg/L	No recent samples	No recent samples	Not recorded
2	Lake ChautauquaPinellas	4.3 ft	10 µg/L	No recent samples	No recent samples	Not recorded
3	Lake TarponPinellas	2.3 ft	30 µg/L	No recent samples	No recent samples	Not recorded
4	Pinellas-Bellevue LakePinellas	5 ft	27 µg/L	No recent samples	No recent samples	✓ Public
5	Pinellas-Tarpon LakePinellas	3 ft	31 µg/L	No recent samples	No recent samples	Not recorded
6	Pinellas-Meadow West LakePinellas	5 ft	35 µg/L	No recent samples	No recent samples	Not recorded
7	Pinellas-Salmons Bay LakePinellas	2.5 ft	36 µg/L	No recent samples	No recent samples	✓ Public
8	Mckay Creek LakePinellas	No recent samples	20 µg/L	No recent samples	No recent samples	✓ Public
9	Lake Tarpon CanalPinellas	3.6 ft	51 µg/L	No recent samples	No recent samples	Not recorded
10	Pinellas-Autu LakePinellas	2.8 ft	49 µg/L	No recent samples	No recent samples	Not recorded
11	Lake MaggiorePinellas	No recent samples	50 µg/L	No recent samples	No recent samples	✓ Public
12	Alligator LakePinellas	2.6 ft	155 µg/L	No recent samples	No recent samples	✓ Public
13	Harbor Isles LakePinellas	1.6 ft	95 µg/L	No recent samples	No recent samples	Not recorded
14	Lake SeminolePinellas	1.6 ft	60 µg/L	No recent samples	No recent samples	Not recorded
15	Lake SeminolePinellas	1 ft	63 µg/L	No recent samples	No recent samples	✓ Public
16	Pinellas-Jungle LakePinellas	2.3 ft	277 µg/L	No recent samples	No recent samples	Not recorded
17	Pinellas-Crescent LakePinellas	4 ft	77 µg/L	No recent samples	No recent samples	Not recorded
18	Lake SeminolePinellas	1 ft	75 µg/L	No recent samples	No recent samples	Not recorded
19	Pinellas-Harbor-Isle LakePinellas	3.5 ft	115.5 µg/L	No recent samples	No recent samples	✓ Public
20	Pinellas-Cliff Stephens Park LakePinellas	4.5 ft	124 µg/L	No recent samples	No recent samples	✓ Public
21	Pinellas-Winston LakePinellas	2.1 ft	82 µg/L	No recent samples	No recent samples	✓ Public
22	Pinellas-Seminole LakePinellas	1.5 ft	63 µg/L	No recent samples	No recent samples	Not recorded
23	Pinellas-Saundra LakePinellas	1.3 ft	101 µg/L	No recent samples	No recent samples	✓ Public
24	Pinellas-Alligator LakePinellas	2.2 ft	158.5 µg/L	No recent samples	No recent samples	Not recorded
25	Pinellas-Jungle North Inlet LakePinellas	1.5 ft	180 µg/L	No recent samples	No recent samples	Not recorded
26	Crecent LakePinellas	No recent samples	80 µg/L	No recent samples	No recent samples	✓ Public
27	Jungle Lake@WfpPinellas	No recent samples	280 µg/L	No recent samples	No recent samples	✓ Public
28	Alligator Creek LakePinellas	No recent samples	155 µg/L	No recent samples	No recent samples	Not recorded
29	South Channel From Lake SuemarPinellas	No recent samples	150 µg/L	No recent samples	No recent samples	Not recorded
30	Lake Diane OutfallPinellas	No recent samples	190 µg/L	No recent samples	No recent samples	✓ Public
	Round LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Little Salt Lake NePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Eagle LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Pinellas-Clearview LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Pasadena Lake WestsidePinellas	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Beckett Lake @ CenterPinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake DisstonPinellas	0.7 ft	94 µg/L	No recent samples	No recent samples	Not recorded
	Woody Ibis Park LakePinellas	2 ft	340 µg/L	No recent samples	No recent samples	✓ Public
	Pinellas-Jungle South Inlet LakePinellas	1 ft	306 µg/L	No recent samples	No recent samples	✓ Public
	Pinellas-Jungle Outlet LakePinellas	2 ft	205.5 µg/L	No recent samples	No recent samples	Not recorded
	Chatauqref LakePinellas	8.2 ft	7 µg/L	No recent samples	No recent samples	Not recorded
	Taylor LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Jerry LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Saint George LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Salt LakePinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lake AvocaPinellas	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Source: the Florida Department of Environmental Protection. See data sources.