Blue Sink Lake
Blue Sink Lake in Hernando County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 112.5 µg/L.
- Clarity
- 2.3 ft
- Typical in August
- 84°F
- Type
- Eutrophic
- Trend
- → Stable
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Blue Sink Lake →
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Blue Sink Lake is a productive, nutrient-rich eutrophic lake in Hernando County, Florida. Water quality is graded D based on 1 sampling years through 2025. Water clarity is improving over recent sampling years. Compared to the 8 other monitored lakes in Hernando County, Blue Sink Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-05. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyElevated nutrients
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)
Very murky, less than 2.3 ft of visibility. Phosphorus level: 112.5 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 112.5 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Blue Sink Lake
Compare lakeside cabins, hotels, and vacation rentals near Blue Sink Lake in Hernando 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 Blue Sink Lake are listed below.
Top-rated places to stay near Blue Sink 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
Blue Sink Lake typically sits around 84°F at the surface in August. Summer average is about 84°F. Usually warmest in Sep (about 85°F) and coldest in Jan (about 55°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 127 field readings (2010–2025) via the EPA Water Quality Portal. See the full Blue Sink Lake water temperature breakdown →
Fishing Blue Sink Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.075 m/yr | 3 |
| Phosphorus | ↓ Declining | +21.75 µg/L/yr | 5 |
EPA Impairment Status
Blue Sink 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 FL1329T · Official waterbody report · Matched by proximity (0.06 km)
County Ranking
Ranked #9 of 9 lakes in Hernando County
Nearby Lakes With Higher Grades
Blue Sink Lake holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Hernando County
Frequently asked questions about Blue Sink Lake
Where is Blue Sink Lake?
- Blue Sink Lake is a lake in Hernando County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Blue Sink Lake?
- Blue Sink Lake in Hernando County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 112.5 µg/L.
Is Blue Sink 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. Blue Sink Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Blue Sink Lake?
- Blue Sink Lake typically sits around 84°F at the surface in August, from 127 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Blue Sink Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
45 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples45 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