St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake
Douglas County, WisconsinView mapDirections
This is the name Wisconsin DNR records for this water. It can describe one sampling location rather than the water as a whole.
Wisconsin DNR publishes the water-quality measurements for St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake. Here is what has been measured.
- Public access
- Limited data
St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake in Douglas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 65.5 µg/L. Chlorophyll-a (algae): 2 µg/L.
St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake is a lake in Douglas County, Wisconsin. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-22. Methodology: how these readings are compared.
What St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
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Water quality measurements for St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake
These are the measurements Wisconsin DNR publishes for St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge 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 1.6 ft of visibility. Phosphorus 65.5 µg/L. Chlorophyll-a 2 µg/L. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 65.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake typically sits around 71°F at the surface in August. Summer average is about 70°F. Usually warmest in Jul (about 77°F) and coldest in May (about 58°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (58°F) to its warmest (77°F).
Typical surface water temperature by month, from 9 field readings (2025–2025) via the EPA Water Quality Portal. See the full St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake water temperature breakdown →
Recreation & Access
- Rice's PointPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Fishing St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake
Water quality readings over time
2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Regulated Pollution Sources Nearby
7 EPA-permitted facilities operate within about 5 miles of St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Wlssd WwtpDuluth · 1.1 mi away · NPDES MN0049786MajorRecent violation
- Erie Pier Processing & Reuse FacilityDuluth · 0.6 mi away · NPDES MN0052612
- Northland PierDuluth · 1.1 mi away · NPDES MN0069141
- Western Lake Superior Sanitary DistrictDuluth · 1.3 mi away · NPDES WI0032263
- Alberta Clipper & Southern LigDuluth · 1.3 mi away · NPDES MN0069426
- Georgia Pacific CorpDuluth · 1.7 mi away · NPDES MN0046043
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Douglas County
Frequently asked questions about St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake
Where is St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake?
- St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake is in Douglas County, Wisconsin. This is the name Wisconsin DNR records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake?
- St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake in Douglas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 65.5 µg/L. Chlorophyll-a (algae): 2 µg/L.
Is St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge 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 St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake?
- St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake typically sits around 71°F at the surface in August, from 9 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake?
- St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Rice's Point. Public access is listed as yes.
Can I fish at St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake?
- St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
36 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA36 samples · 2024–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory