Union County Lake Quality
Florida, 3 lakes, average grade B (Good)
Only 3 lakes in Union County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Union County sits comfortably above the Florida median.
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 Union-Butler Lake (B); the most-stressed is Union-Butler Lake (B).
Where to stay near Union County
Top-rated places to stay near Union 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 Union County?
Get lake water-quality report cards plus the best cabin & lodging deals near Union County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Union County
Planning a trip? Check special fishing regulations for Union-Butler Lake — or check the official Florida fishing regulations.
All Lakes in Union County
3 lakes · 2 graded, 1 not rated2 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | BUnion-Butler LakeUnion | B | 3 ft | 23 µg/L | No recent samples | No recent samples | Not recorded |
| 2 | BPalstctref LakeUnion | B | 2.1 ft | 27.5 µg/L | No recent samples | No recent samples | Not recorded |
| NRSfpndctref LakeUnion | NR | 1 ft | 66.5 µg/L | No recent samples | No recent samples | Not recorded |
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
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Florida
See how Union County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.