St. Patrick Lake
St. Patrick Lake in Becker County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3 ft visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 2.7 µg/L.
- Clarity
- 3 ft
- Max depth
- ~28 ft est.
- Public access
- No
Next lake in Becker County
Why St. Patrick Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For St. Patrick Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
St. Patrick Lake is a lake in Becker County, Minnesota with an estimated average depth of about 28 feet. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-06-09. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for St. Patrick Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 3 ft of visibility. Phosphorus level: 24 µg/L. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Not graded |
| Phosphorus | 24 µg/L | Not graded |
| Chlorophyll-a (Algae) | 2.7 µg/L | Not graded |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near St. Patrick Lake
Compare lakeside cabins, hotels, and vacation rentals near St. Patrick Lake in Becker 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~28 ft est. |
| Average Depth | ~8 ft est. |
| Public Access | No |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Minnesota has not published bathymetry for St. Patrick Lake.
Lake Size & Watershed
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.
Fishing St. Patrick Lake
Reservoir Info (USACE NID)
St. Patrick Lake is a man-made reservoir impounded by the Stakkelhouse Lake (completed 1953), built primarily for fire protection, stock, or small fish pond on the PELICAN RIVER - TR; gravity-type dam, 11 ft tall and 32 ft long.
- Normal storage
- 50 ac-ft
- Max storage
- 60 ac-ft
- Hazard class
- Low
- Owner
- Gregerson and Peterson
Source: USACE National Inventory of Dams, NID ID MN00746 · Operator website
Graded lakes near St. Patrick Lake
St. Patrick Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Becker County
Frequently asked questions about St. Patrick Lake
What is the water quality grade for St. Patrick Lake?
- St. Patrick Lake in Becker County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3 ft visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 2.7 µg/L.
Is St. Patrick Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. St. Patrick Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 2.7 µg/L. Always check local health department advisories before swimming.
How deep is St. Patrick Lake?
- No published bathymetric survey covers St. Patrick Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 28 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
3 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA3 samples · 2022
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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)
Lake details from Minnesota DNR LakeFinder