Pasco-Big Vienna Lake
Pasco-Big Vienna Lake in Pasco County, Florida has a water quality grade of B (Good). Water clarity: 4.4 ft visibility. Phosphorus: 26 µg/L.
- Clarity
- 4.4 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- ↓ Declining
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Pasco-Big Vienna Lake is a productive, nutrient-rich eutrophic lake in Pasco County, Florida. Water quality is graded B based on 1 sampling years through 2021. Overall water quality is declining over recent sampling years. Compared to the 14 other monitored lakes in Pasco County, Pasco-Big Vienna Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-08-08. 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 4.4 ft. Phosphorus level: 26 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | Not graded |
| Phosphorus | 26 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Pasco-Big Vienna Lake
Compare lakeside cabins, hotels, and vacation rentals near Pasco-Big Vienna Lake in Pasco 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 Pasco-Big Vienna Lake
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Water Temperature
Pasco-Big Vienna Lake typically sits around 86°F at the surface in August. Summer average is about 86°F. Usually warmest in Aug (about 86°F) and coldest in Feb (about 64°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 65 field readings (2010–2019) via the EPA Water Quality Portal. See the full Pasco-Big Vienna Lake water temperature breakdown →
Fishing Pasco-Big Vienna Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.28 m/yr | 5 |
| Phosphorus | → Stable | -0.4 µg/L/yr | 5 |
EPA Impairment Status
Pasco-Big Vienna 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 FL1456C · Official waterbody report · Matched by proximity (0.76 km)
County Ranking
Ranked #5 of 15 lakes in Pasco County
Nearby Lakes in Pasco County
Frequently asked questions about Pasco-Big Vienna Lake
Where is Pasco-Big Vienna Lake?
- Pasco-Big Vienna Lake is a lake in Pasco County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pasco-Big Vienna Lake?
- Pasco-Big Vienna Lake in Pasco County, Florida has a water quality grade of B (Good). Water clarity: 4.4 ft visibility. Phosphorus: 26 µg/L.
Is Pasco-Big Vienna Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Pasco-Big Vienna Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Pasco-Big Vienna Lake?
- Pasco-Big Vienna Lake typically sits around 86°F at the surface in August, from 65 EPA Water Quality Portal field readings (2010–2019). That is a typical value for the month, not a live reading.
Explore Pasco-Big Vienna Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Hillsborough County · 6.5 ft
Hillsborough County · 7.8 ft
Hillsborough County · 4.8 ft
Hillsborough County · 4.9 ft
Hillsborough County · 5 ft
Hillsborough County · 3.5 ft
Eutrophic Lakes in Florida
Where this data comes from
18 measurements from 3 monitoring stations, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX18 samples · 2021
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