Swamp Lake
Scott County, MinnesotaView mapDirections
Minnesota PCA publishes the water-quality measurements for Swamp Lake. Here is what has been measured.
- Eutrophic
- 26 ft max depth
- Limited data
Swamp Lake in Scott County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 122 µg/L. Chlorophyll-a (algae): 38 µg/L.
Swamp Lake is a productive, nutrient-rich eutrophic lake in Scott County, Minnesota with an estimated average depth of about 26 feet. Compared to the 20 other monitored lakes in Scott County, Swamp Lake ranks #17 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-01. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Swamp Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Swamp Lake
These are the measurements Minnesota PCA publishes for Swamp Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.1 ft of visibility. Phosphorus 122 µg/L. Chlorophyll-a 38 µg/L. TSI 69.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 122µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 38µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 69 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Swamp Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Swamp Lake typically sits around 67°F at the surface in September. Summer average is about 70°F. Usually warmest in Jun (about 71°F) and coldest in Apr (about 52°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (52°F) to its warmest (71°F).
Typical surface water temperature by month, from 13 field readings (2024–2024) via the EPA Water Quality Portal. See the full Swamp Lake water temperature breakdown →
Lake Details
Max depth
~26 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Minnesota has not published bathymetry for Swamp Lake.
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Surface area
37 acres
HydroLAKES / HydroSHEDS
Shoreline
1.1 mi
HydroLAKES / HydroSHEDS
Elevation
938 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near Swamp Lake
Compare lakeside cabins, hotels, and vacation rentals near Swamp Lake in Scott 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Swamp Lake are listed below.
Top-rated places to stay near Swamp Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
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 →
Follow Swamp Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Swamp Lake
Nearby Lakes in Scott County
Frequently asked questions about Swamp Lake
Where is Swamp Lake?
- Swamp Lake is a lake in Scott County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Swamp Lake?
- Swamp Lake in Scott County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 122 µg/L. Chlorophyll-a (algae): 38 µg/L.
Is Swamp Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Swamp Lake?
- Swamp Lake typically sits around 67°F at the surface in September, from 13 EPA Water Quality Portal field readings (2024–2024). That is a typical value for the month, not a live reading.
How deep is Swamp Lake?
- No published bathymetric survey covers Swamp Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 26 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Swamp Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in Scott County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Minnesota River Watershed, ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Swamp Lake
Other Lakes in Minnesota
Eutrophic Lakes in Minnesota
Where this data comes from
44 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
MNPCA44 samples · 2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- Analysis of Chlorophyll in Periphyton and Plankton
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder