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

Bay County Lake Quality

Florida, 17 lakes, average grade B (Good)

Bay County's 17 graded lakes fall in the moderate-density bracket for Florida. 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. With an average grade of B, Bay County sits comfortably above the Florida median.

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. Bay-Deer Point Lake (B) is the cleanest in the county.

Slim Lake, Washburn County, Wisconsin. Photo: LakeQuality — Original photograph

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Quick Answers for Bay County

Cleanest lakes in Bay County →Cleanest lakes in Florida →Safest swimming lakes in Florida →

Planning a trip? Check special fishing regulations for Bay-Deer Point Lake — or check the official Florida fishing regulations.

All Lakes in Bay County

17 lakes · 4 graded, 13 not rated4 graded lakes · 13 not rated, hidden

Include not-rated lakes (13)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Access
1	BBay-Deer Point LakeBay	B	4 ft	14 µg/L	No recent samples	No recent samples	Not recorded
2	BBay-Powell LakeBay	B	4.5 ft	13 µg/L	No recent samples	No recent samples	✓ Public
3	BBay-Marin LakeBay	B	10.5 ft	8 µg/L	No recent samples	No recent samples	Not recorded
4	BBay-Lullwater LakeBay	B	5 ft	29 µg/L	No recent samples	No recent samples	Not recorded
	NRBay-St. Andrew Bay LakeBay	NR	14 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBay-North Bay LakeBay	NR	7 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBay-Parker-Bayou LakeBay	NR	8 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBay-Watson-Bayou LakeBay	NR	8.5 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBay-West-Bay LakeBay	NR	3.3 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBay-West Bay LakeBay	NR	5.3 ft	No recent samples	No recent samples	No recent samples	Not recorded
	NRBay-Mill-Bayou LakeBay	NR	4.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
	NRBay-Robinson-Bayou LakeBay	NR	3 ft	No recent samples	No recent samples	No recent samples	✓ Public
	NRBayou George LakeBay	NR	1.3 ft	17 µg/L	No recent samples	No recent samples	Not recorded
	NRLullwater Lake Ne LobeBay	NR	1 ft	160 µg/L	No recent samples	No recent samples	Not recorded
	NRDeerpoint LakeBay	NR	4.1 ft	8 µg/L	No recent samples	No recent samples	Not recorded
	NRLullwater Lake Ne LobeBay	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMartin LakeBay	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public

NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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