Petty Gulf Lake
Petty Gulf Lake in Leon County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1 ft visibility. Phosphorus: 32.5 µg/L. Surface area: 25 acres.
- Clarity
- 1 ft
- Area
- 25 acres
- Trend
- ↓ Declining
Next lake in Leon County
Swipe left or right on this bar to open the next or previous lake.
Why Petty Gulf Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Petty Gulf Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Petty Gulf Lake is a 25-acre lake in Leon County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-10-31. Grade methodology: LakeQuality methodology.
Watch Petty Gulf Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Petty Gulf Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1 ft of visibility. Phosphorus level: 32.5 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 ft | Not graded |
| Phosphorus | 32.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Petty Gulf Lake
Compare lakeside cabins, hotels, and vacation rentals near Petty Gulf Lake in Leon County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Petty Gulf Lake
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 whole trip? See where to stay at Florida’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 25 acres |
No bathymetric survey has been published for Petty Gulf Lake, so its depth is not documented here.
Fishing Petty Gulf Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.499 m/yr | 6 |
| Phosphorus | ↓ Declining | +1 µg/L/yr | 6 |
Reservoir Info (USACE NID)
Petty Gulf Lake is a man-made reservoir impounded by the Petty Gulf Lake Dam (completed 1972), built primarily for recreation on the Tr-Lake Iamonia; earth-type dam, 25 ft tall and 1,440 ft long.
- Surface area
- 25 ac
- Normal storage
- 203 ac-ft
- Max storage
- 233 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- KILLEARN LAKES PLANTATION HOME OWNERS ASSOCIATION
All listed purposes: Recreation;Fire Protection, Stock, Or Small Fish Pond.
Source: USACE National Inventory of Dams, NID ID FL00117 · Operator website
EPA Impairment Status
Petty Gulf Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL564C · Official waterbody report
Graded lakes near Petty Gulf Lake
Petty Gulf Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Leon County
Frequently asked questions about Petty Gulf Lake
Where is Petty Gulf Lake?
- Petty Gulf Lake is a lake in Leon County, Florida. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Petty Gulf Lake?
- Petty Gulf Lake in Leon County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1 ft visibility. Phosphorus: 32.5 µg/L. Surface area: 25 acres.
Is Petty Gulf Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Petty Gulf Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Petty Gulf Lake across LakeQuality
More Florida Lake Rankings
Other Lakes in Florida
Gadsden County · Not rated
Gadsden County · Not rated
Gadsden County · 1.6 ft
Jefferson County · Not rated
Jefferson County · 2.5 ft
Gadsden County · Not rated
Eutrophic Lakes in Florida
Where this data comes from
10 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples10 samples · 2024
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database