Nors Lake
Nors Lake in Lake County, Florida has a water quality grade of C (Fair). Water clarity: 1.2 ft visibility. Phosphorus: 50.8 µg/L.
- Clarity
- 1.2 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- → Stable
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Nors Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded C based on 1 sampling years through 2022. Water clarity is improving over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Nors Lake ranks #108 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-08-15. 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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 1.2 ft of visibility. Phosphorus level: 50.8 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 ft | Not graded |
| Phosphorus | 50.8 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Nors Lake
Compare lakeside cabins, hotels, and vacation rentals near Nors Lake in Lake 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 Nors Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Nors Lake typically sits around 86°F at the surface in August. Summer average is about 85°F. Usually warmest in Aug (about 86°F) and coldest in Dec (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 27 field readings (2017–2022) via the EPA Water Quality Portal. See the full Nors Lake water temperature breakdown →
Fishing Nors Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.01 m/yr | 4 |
| Phosphorus | ↓ Declining | +6.55 µg/L/yr | 5 |
EPA Impairment Status
Nors Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2929B · Official waterbody report · Matched by proximity (0.67 km)
County Ranking
Ranked #108 of 128 lakes in Lake County
Nearby Lakes With Higher Grades
Nors Lake holds Grade C. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Lake County
Frequently asked questions about Nors Lake
Where is Nors Lake?
- Nors Lake is a lake in Lake County, Florida. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Nors Lake?
- Nors Lake in Lake County, Florida has a water quality grade of C (Fair). Water clarity: 1.2 ft visibility. Phosphorus: 50.8 µg/L.
Is Nors Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Nors Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
What is the water temperature of Nors Lake?
- Nors Lake typically sits around 86°F at the surface in August, from 27 EPA Water Quality Portal field readings (2017–2022). That is a typical value for the month, not a live reading.
Explore Nors Lake across LakeQuality
More Florida Lake Rankings
Other Grade C Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
34 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX34 samples · 2020–2022
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