Hillsborough-Harvey Lake
Hillsborough-Harvey Lake in Hillsborough County, Florida has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 8 µg/L.
- Clarity
- 5 ft
- Typical in August
- 83°F
- Type
- Mesotrophic
- Trend
- ↓ Declining
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Hillsborough-Harvey Lake is a mesotrophic lake in Hillsborough County, Florida. Water quality is graded B based on 1 sampling years through 2022. Overall water quality is declining over recent sampling years. Compared to the 123 other monitored lakes in Hillsborough County, Hillsborough-Harvey Lake ranks #20 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-05-11. 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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 5 ft. Phosphorus level: 8 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 8 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Hillsborough-Harvey Lake
Compare lakeside cabins, hotels, and vacation rentals near Hillsborough-Harvey 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-Harvey Lake
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Water Temperature
Hillsborough-Harvey Lake typically sits around 83°F at the surface in August. Summer average is about 85°F. Usually warmest in Jun (about 86°F) and coldest in Mar (about 74°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 10 field readings (2015–2015) via the EPA Water Quality Portal. See the full Hillsborough-Harvey Lake water temperature breakdown →
Fishing Hillsborough-Harvey Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.027 m/yr | 6 |
| Phosphorus | → Stable | +0.3 µg/L/yr | 5 |
EPA Impairment Status
Hillsborough-Harvey 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 FL1463D · Official waterbody report · Matched by proximity (0.01 km)
County Ranking
Ranked #20 of 124 lakes in Hillsborough County
Nearby Lakes in Hillsborough County
Frequently asked questions about Hillsborough-Harvey Lake
Where is Hillsborough-Harvey Lake?
- Hillsborough-Harvey 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-Harvey Lake?
- Hillsborough-Harvey Lake in Hillsborough County, Florida has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 8 µg/L.
Is Hillsborough-Harvey Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Hillsborough-Harvey Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Hillsborough-Harvey Lake?
- Hillsborough-Harvey Lake typically sits around 83°F at the surface in August, from 10 EPA Water Quality Portal field readings (2015–2015). That is a typical value for the month, not a live reading.
Explore Hillsborough-Harvey Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
18 measurements from 3 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX18 samples · 2020–2022
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