M of Petty Gulf Lake
M of Petty Gulf Lake in Leon County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.6 ft visibility. Phosphorus: 21 µg/L. Surface area: 25 acres.
- Clarity
- 1.6 ft
- Typical in July
- 89°F
- Area
- 25 acres
- Trend
- ↓ Declining
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Why M of 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 M of 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.
M of 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 2025-06-25. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedBacteria A
Based on E. coli testing, M of Petty Gulf Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 8 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water quality measurements for M of Petty Gulf Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.6 ft of visibility. Phosphorus level: 21 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | Not graded |
| Phosphorus | 21 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near M of Petty Gulf Lake
Compare lakeside cabins, hotels, and vacation rentals near M of 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 M of Petty Gulf Lake
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Water Temperature
M of Petty Gulf Lake typically sits around 89°F at the surface in July. Summer average is about 90°F. Usually warmest in Jun (about 90°F) and coldest in Nov (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 31 field readings (2014–2025) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 25 acres |
No bathymetric survey has been published for M of Petty Gulf Lake, so its depth is not documented here.
Fishing M of 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)
M of 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 · Matched by proximity (0.52 km)
EPA Impairment Status
M of 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 · Matched by proximity (0.07 km)
Graded lakes near M of Petty Gulf Lake
M of Petty Gulf Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Leon County
Frequently asked questions about M of Petty Gulf Lake
Where is M of Petty Gulf Lake?
- M of 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 M of Petty Gulf Lake?
- M of Petty Gulf Lake in Leon County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.6 ft visibility. Phosphorus: 21 µg/L. Surface area: 25 acres.
Is M of Petty Gulf Lake safe to swim in?
- Based on E. coli testing, M of Petty Gulf Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 8 samples across 2 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. M of Petty Gulf Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of M of Petty Gulf Lake?
- M of Petty Gulf Lake typically sits around 89°F at the surface in July, from 31 EPA Water Quality Portal field readings (2014–2025). That is a typical value for the month, not a live reading.
Explore M of Petty Gulf Lake across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples5 samples · 2025
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