Hillsborough-Magdalene Lake
Hillsborough-Magdalene Lake in Hillsborough County, Florida has a water quality grade of B (Good). Water clarity: 7 ft visibility. Phosphorus: 16 µg/L.
- Clarity
- 7 ft
- Typical in August
- 86°F
- Type
- Mesotrophic
- Trend
- → Stable
Next lake in Hillsborough County
Swipe left or right on this bar to open the next or previous lake.
Hillsborough-Magdalene Lake is a mesotrophic lake in Hillsborough County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 123 other monitored lakes in Hillsborough County, Hillsborough-Magdalene Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-26. Grade methodology: LakeQuality methodology.
Watch Hillsborough-Magdalene Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLow algae
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Moderate clarity, visible to about 7 ft. Phosphorus level: 16 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | 16 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Hillsborough-Magdalene Lake
Compare lakeside cabins, hotels, and vacation rentals near Hillsborough-Magdalene Lake in Hillsborough 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 Hillsborough-Magdalene 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
Hillsborough-Magdalene Lake typically sits around 86°F at the surface in August. Summer average is about 86°F. Usually warmest in Jun (about 86°F) and coldest in Feb (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 36 field readings (2011–2020) via the EPA Water Quality Portal. See the full Hillsborough-Magdalene Lake water temperature breakdown →
Fishing Hillsborough-Magdalene Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.269 m/yr | 6 |
| Phosphorus | ↑ Improving | -2.17 µg/L/yr | 6 |
EPA Impairment Status
Hillsborough-Magdalene 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 FL1523C · Official waterbody report · Matched by proximity (2.11 km)
County Ranking
Ranked #4 of 124 lakes in Hillsborough County
Nearby Lakes in Hillsborough County
Frequently asked questions about Hillsborough-Magdalene Lake
Where is Hillsborough-Magdalene Lake?
- Hillsborough-Magdalene Lake is a lake in Hillsborough County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hillsborough-Magdalene Lake?
- Hillsborough-Magdalene Lake in Hillsborough County, Florida has a water quality grade of B (Good). Water clarity: 7 ft visibility. Phosphorus: 16 µg/L.
Is Hillsborough-Magdalene Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Hillsborough-Magdalene Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Hillsborough-Magdalene Lake?
- Hillsborough-Magdalene Lake typically sits around 86°F at the surface in August, from 36 EPA Water Quality Portal field readings (2011–2020). That is a typical value for the month, not a live reading.
Explore Hillsborough-Magdalene Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
208 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX208 samples · 2020–2025
Monitoring station identifiers (3)
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