Bass Lake: Southeast Basin
Bass Lake: Southeast Basin in Beltrami County, Minnesota has a water quality grade of A (Excellent). Water clarity: 9 ft visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 3.6 µg/L.
- Clarity
- 9 ft
- Typical in August
- 72°F
- Type
- Mesotrophic
- Trend
- ↓ Declining
Next lake in Beltrami County
Swipe left or right on this bar to open the next or previous lake.
Bass Lake: Southeast Basin is a mesotrophic lake in Beltrami County, Minnesota. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 84 other monitored lakes in Beltrami County, Bass Lake: Southeast Basin ranks #50 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-10. Grade methodology: LakeQuality methodology.
Watch Bass Lake: Southeast Basin 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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 9 ft. Phosphorus level: 12.5 µg/L. Chlorophyll-a: 3.6 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | Not graded |
| Phosphorus | 12.5 µg/L | Good |
| Chlorophyll-a (Algae) | 3.6 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Bass Lake: Southeast Basin
Compare lakeside cabins, hotels, and vacation rentals near Bass Lake: Southeast Basin in Beltrami County, Minnesota — 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 Bass Lake: Southeast Basin
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 Minnesota’s top lakes →
Water Temperature
Bass Lake: Southeast Basin typically sits around 72°F at the surface in August. Summer average is about 72°F. Usually warmest in Jul (about 75°F) and coldest in Jan (about 34°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 63 field readings (2011–2025) via the EPA Water Quality Portal. See the full Bass Lake: Southeast Basin water temperature breakdown →
Fishing Bass Lake: Southeast Basin
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.386 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.6 µg/L/yr | 6 |
| Chlorophyll-a | ↓ Declining | +0.13 µg/L/yr | 6 |
County Ranking
Ranked #50 of 85 lakes in Beltrami County
Nearby Lakes in Beltrami County
Frequently asked questions about Bass Lake: Southeast Basin
Where is Bass Lake: Southeast Basin?
- Bass Lake: Southeast Basin is a lake in Beltrami County, Minnesota. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Bass Lake: Southeast Basin?
- Bass Lake: Southeast Basin in Beltrami County, Minnesota has a water quality grade of A (Excellent). Water clarity: 9 ft visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 3.6 µg/L.
Is Bass Lake: Southeast Basin safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Bass Lake: Southeast Basin has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3.6 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Bass Lake: Southeast Basin?
- Bass Lake: Southeast Basin typically sits around 72°F at the surface in August, from 63 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
Explore Bass Lake: Southeast Basin across LakeQuality
Fish species and top-graded lakes across Minnesota
Fish species and best lakes in Beltrami County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its grade
Lakes in the Mississippi Headwaters, ranked by water quality
Moderate nutrients, good water quality
Minnesota's cleanest and most-polluted lakes, ranked
More Minnesota Lake Rankings
State Parks Near Bass Lake: Southeast Basin
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Where this data comes from
96 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Red Lake DNR
REDLAKE_WQX96 samples · 2020–2025
Analytical methods
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidity by Nephelometry
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
Lake size & watershed from HydroLAKES (HydroSHEDS)