Ow-Ctr Lake
Ow-Ctr Lake in Seminole County, Florida has a water quality grade of C (Fair). Water clarity: 1.1 ft visibility. Phosphorus: 49.1 µg/L.
- Clarity
- 1.1 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- ↓ Declining
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Ow-Ctr Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded C based on 1 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Ow-Ctr Lake ranks #106 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-10. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyModerate
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 1.1 ft of visibility. Phosphorus level: 49.1 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.1 ft | Not graded |
| Phosphorus | 49.1 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Ow-Ctr Lake
Compare lakeside cabins, hotels, and vacation rentals near Ow-Ctr Lake in Seminole 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 Ow-Ctr Lake
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Water Temperature
Ow-Ctr Lake typically sits around 86°F at the surface in August. Summer average is about 85°F. Usually warmest in Jul (about 86°F) and coldest in Jan (about 58°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 102 field readings (2012–2025) via the EPA Water Quality Portal. See the full Ow-Ctr Lake water temperature breakdown →
Fishing Ow-Ctr Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.101 m/yr | 6 |
| Phosphorus | → Stable | +0.25 µg/L/yr | 6 |
EPA Impairment Status
Ow-Ctr Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2981 · Official waterbody report · Matched by proximity (2.29 km)
County Ranking
Ranked #106 of 122 lakes in Seminole County
Nearby Lakes in Seminole County
Frequently asked questions about Ow-Ctr Lake
Where is Ow-Ctr Lake?
- Ow-Ctr Lake is a lake in Seminole County, Florida. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ow-Ctr Lake?
- Ow-Ctr Lake in Seminole County, Florida has a water quality grade of C (Fair). Water clarity: 1.1 ft visibility. Phosphorus: 49.1 µg/L.
Is Ow-Ctr Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Ow-Ctr Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
What is the water temperature of Ow-Ctr Lake?
- Ow-Ctr Lake typically sits around 86°F at the surface in August, from 102 EPA Water Quality Portal field readings (2012–2025). That is a typical value for the month, not a live reading.
Explore Ow-Ctr Lake across LakeQuality
More Florida Lake Rankings
Other Grade C Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
270 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX270 samples · 2020–2025
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