Theresactr Lake
Theresactr Lake in Orange County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3.6 ft visibility. Phosphorus: 70 µg/L.
- Clarity
- 3.6 ft
- Typical in July
- 88°F
- Type
- Eutrophic
- Trend
- ↓ Declining
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Theresactr Lake →
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Theresactr Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded D based on 1 sampling years through 2021. Overall water quality is declining over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Theresactr Lake ranks #295 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-07-29. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 3.6 ft. Phosphorus level: 70 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | Not graded |
| Phosphorus | 70 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Theresactr Lake
Compare lakeside cabins, hotels, and vacation rentals near Theresactr Lake in Orange 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Theresactr Lake are listed below.
Top-rated places to stay near Theresactr 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 →
Water Temperature
Theresactr Lake typically sits around 88°F at the surface in July. Summer average is about 87°F. Usually warmest in Jul (about 88°F) and coldest in Jan (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 30 field readings (2019–2021) via the EPA Water Quality Portal. See the full Theresactr Lake water temperature breakdown →
Fishing Theresactr Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.096 m/yr | 6 |
| Phosphorus | ↓ Declining | +1.76 µg/L/yr | 6 |
EPA Impairment Status
Theresactr 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 FL3168W2 · Official waterbody report · Matched by proximity (1.01 km)
County Ranking
Ranked #295 of 320 lakes in Orange County
Nearby Lakes With Higher Grades
Theresactr Lake holds Grade D. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Orange County
Frequently asked questions about Theresactr Lake
Where is Theresactr Lake?
- Theresactr Lake is a lake in Orange County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Theresactr Lake?
- Theresactr Lake in Orange County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3.6 ft visibility. Phosphorus: 70 µg/L.
Is Theresactr Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Theresactr Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Theresactr Lake?
- Theresactr Lake typically sits around 88°F at the surface in July, from 30 EPA Water Quality Portal field readings (2019–2021). That is a typical value for the month, not a live reading.
Explore Theresactr Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
18 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples18 samples · 2020–2021
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