S School Section Lake
S School Section Lake in Washington County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 4 ft visibility. Phosphorus: 42.5 µg/L. Chlorophyll-a (algae): 42.5 µg/L. Maximum depth: 26 ft. Surface area: 95.47 acres.
- Clarity
- 4 ft
- Typical in August
- 73°F
- Max depth
- 26 ft
- Area
- 95 acres
- Type
- Eutrophic
- Public access
- No
- Ice-out
- Apr 23
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near S School Section Lake →
Next lake in Washington County
S School Section Lake is a 95-acre productive, nutrient-rich eutrophic lake in Washington County, Minnesota with a maximum depth of 26 feet (16-foot average). Water quality is graded F based on 2 sampling years through 2024. The lake supports 9 documented fish species including black bullhead, black crappie, and bluegill. No public access — the lake is private or restricted. Compared to the 74 other monitored lakes in Washington County, S School Section Lake ranks #72 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-21. Grade methodology: LakeGrade 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.
Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom
Water Quality Grade: F (Algae-prone)
Murky, only visible to about 4 ft. Phosphorus level: 42.5 µg/L. Chlorophyll-a: 42.5 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4 ft | Not graded |
| Phosphorus | 42.5 µg/L | Poor |
| Chlorophyll-a (Algae) | 42.5 µg/L | Poor |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near S School Section Lake
Compare lakeside cabins, hotels, and vacation rentals near S School Section Lake in Washington 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around S School Section Lake are listed below.
Top-rated places to stay near S School Section Lake
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Planning a whole trip? See where to stay at Minnesota’s top lakes →
Water Temperature
S School Section Lake typically sits around 73°F at the surface in August. Summer average is about 70°F. Usually warmest in Aug (about 73°F) and coldest in Apr (about 47°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 229 field readings (2010–2024) via the EPA Water Quality Portal. See the full S School Section Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 26 ft |
| Average Depth | 15.6 ft |
| Surface Area | 95 acres |
| Shoreline Length | 1.8 mi |
| Littoral Zone | 54% |
| Public Access | No |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing S School Section Lake
Ice Season
Historical ice data from Minnesota DNR (3 observations).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 1999-03-31 (1999) | 2008-04-24 (2008) |
Most recent ice-out: 2008-04-24
EPA Impairment Status
S School Section Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MN82-0151-00 · Official waterbody report · Matched by proximity (0.26 km)
County Ranking
Ranked #72 of 75 lakes in Washington County
Nearby Lakes in Washington County
Frequently asked questions about S School Section Lake
What is the water quality grade for S School Section Lake?
- S School Section Lake in Washington County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 4 ft visibility. Phosphorus: 42.5 µg/L. Chlorophyll-a (algae): 42.5 µg/L. Maximum depth: 26 ft. Surface area: 95.47 acres.
Is S School Section Lake safe to swim in?
- Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. S School Section Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 42.5 µg/L. Always check local health department advisories before swimming.
What is the water temperature of S School Section Lake?
- S School Section Lake typically sits around 73°F at the surface in August, from 229 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is S School Section Lake?
- S School Section Lake has a maximum depth of 26 feet and an average depth of 15.6 feet. The lake covers 95.47 acres.
What fish are in S School Section Lake?
- Fish species found in S School Section Lake include black bullhead, black crappie, bluegill, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, white sucker. S School Section Lake is located in Washington County, Minnesota.
When does S School Section Lake thaw?
- S School Section Lake typically has ice-out around Apr 23.
Explore S School Section Lake across LakeGrade
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
56 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA56 samples · 2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- Analysis of Chlorophyll in Periphyton and Plankton
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate