Marion County Lake Quality

Florida, 30 lakes, average grade B (Good)

Marion County's 30 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. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Marion-Deerback Lake (B); the most-stressed is Marion-Charles Lake (D).

Loading map…

Where to stay near Marion County

Top-rated places to stay near Marion County

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Marion County?

Get lake water-quality report cards plus the best cabin & lodging deals near Marion County — straight to your inbox. No spam, unsubscribe anytime.

Quick Answers for Marion County

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

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

All Lakes in Marion County

30 lakes · 17 graded, 13 not rated17 graded lakes · 13 not rated, hidden

Include not-rated lakes (13)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Access
1	BMarion-Deerback LakeMarion	B	7 ft	11 µg/L	No recent samples	No recent samples	Not recorded
2	BLillkweir LakeMarion	B	5.2 ft	11.5 µg/L	No recent samples	No recent samples	Not recorded
3	BMarion-Horseshoe LakeMarion	B	9 ft	14 µg/L	No recent samples	No recent samples	Not recorded
4	BMarion-Halfmoon LakeMarion	B	4.5 ft	14 µg/L	No recent samples	No recent samples	✓ Public
5	BMarion-Buck LakeMarion	B	8 ft	9 µg/L	No recent samples	No recent samples	✓ Public
6	BKer LakeMarion	B	9.8 ft	13.7 µg/L	No recent samples	No recent samples	✓ Public
7	BClw LakeMarion	B	5.2 ft	18.4 µg/L	No recent samples	No recent samples	Not recorded
8	BMarion-Doe LakeMarion	B	2.8 ft	19 µg/L	No recent samples	No recent samples	✓ Public
9	BMarion-Mill Dam LakeMarion	B	11 ft	9 µg/L	No recent samples	No recent samples	✓ Public
10	BLkottng LakeMarion	B	3 ft	38 µg/L	No recent samples	No recent samples	Not recorded
11	BMarion-Sunset Harbor LakeMarion	B	5.8 ft	14 µg/L	No recent samples	No recent samples	✓ Public
12	BMarion-Little Weir LakeMarion	B	4 ft	12 µg/L	No recent samples	No recent samples	Not recorded
13	BMarion-Weir LakeMarion	B	4.8 ft	15 µg/L	No recent samples	No recent samples	Not recorded
14	BMarion-Lou LakeMarion	B	3.3 ft	18.5 µg/L	No recent samples	No recent samples	✓ Public
15	DMarion-Charles LakeMarion	D	1 ft	68 µg/L	No recent samples	No recent samples	✓ Public
16	DMarion-Eaton LakeMarion	D	0.8 ft	81 µg/L	No recent samples	No recent samples	✓ Public
17	DBlue Cove LakeMarion	D	2.5 ft	120 µg/L	No recent samples	No recent samples	Not recorded
	NRLake Weir @ Ne ShoreMarion	NR	7.2 ft	12 µg/L	No recent samples	No recent samples	Not recorded
	NRPutnam-Rodman LakeMarion	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRPutnam-Rodman LakeMarion	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake Weir @ Boat RampMarion	NR	5.2 ft	14 µg/L	No recent samples	No recent samples	✓ Public
	NRLake Weir @ N ShoreMarion	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake WeirMarion	NR	4.9 ft	14.5 µg/L	No recent samples	No recent samples	Not recorded
	NRLkeatonctr LakeMarion	NR	1.6 ft	75 µg/L	No recent samples	No recent samples	Not recorded
	NRLake Eaton CenterMarion	NR	2.8 ft	34.5 µg/L	No recent samples	No recent samples	Not recorded
	NRKerrwest LakeMarion	NR	6.2 ft	12 µg/L	No recent samples	No recent samples	✓ Public
	NRPglk LakeMarion	NR	6.1 ft	7.5 µg/L	No recent samples	No recent samples	Not recorded
	NRLkeweir LakeMarion	NR	6.2 ft	12 µg/L	No recent samples	No recent samples	Not recorded
	NRLakekerrMarion	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake BryantMarion	NR	No recent samples	25 µg/L	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.

Lake Match