Ogrens Lake
Ogrens Lake in Chisago County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 2.6 ft visibility. Phosphorus: 56 µg/L. Chlorophyll-a (algae): 35 µg/L. Maximum depth: 41 ft. Surface area: 48.22 acres.
- Clarity
- 2.6 ft
- Typical in August
- 75°F
- Max depth
- 41 ft
- Area
- 48 acres
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- No
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Ogrens Lake →
Next lake in Chisago County
Ogrens Lake is a 48-acre productive, nutrient-rich eutrophic lake in Chisago County, Minnesota with a maximum depth of 41 feet. Water quality is graded F based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 29 other monitored lakes in Chisago County, Ogrens Lake ranks #29 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-06-24. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyAlgae risk
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)
Very murky, less than 2.6 ft of visibility. Phosphorus level: 56 µg/L. Chlorophyll-a: 35 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | Not graded |
| Phosphorus | 56 µg/L | Poor |
| Chlorophyll-a (Algae) | 35 µg/L | Poor |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Ogrens Lake
Compare lakeside cabins, hotels, and vacation rentals near Ogrens Lake in Chisago 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 Ogrens Lake are listed below.
Top-rated places to stay near Ogrens Lake
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
Ogrens Lake typically sits around 75°F at the surface in August. Summer average is about 77°F. Usually warmest in Jul (about 79°F) and coldest in May (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 25 field readings (2010–2024) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 41 ft |
| Surface Area | 48 acres |
| Shoreline Length | 1.4 mi |
| Littoral Zone | 64% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Ogrens Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1989-06-14 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 75.50 | 0.21 lb |
| Black Bullhead | 9.38 | 0.32 lb |
| Pumpkinseed | 5.50 | 0.2 lb |
| Black Crappie | 4.88 | 0.15 lb |
| White Sucker | 0.50 | 2.6 lb |
| Hybrid Sunfish | 0.50 | 0.3 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1989-06-14 survey
A LAKE SURVEY WAS CONDUCTED DURING THE MONTH OF JUNE 1989 ON OGRENS LAKE. TWO GILLNETS AND FOUR TRAPNETS WERE SET IN AN EFFORT TO OBTAIN DATA PERTAINING TO THE PRESENT FISH POPULATION. SHORE- LINE SEINING WAS PERFORMED IN LATE AUGUST TO EVALUATE NATURAL REPRODUCTION OF THE FISH SPECIES PRESENT. WITH RESPECT TO LOCAL…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Ogrens Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — OgrensFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.097 m/yr | 6 |
| Phosphorus | ↑ Improving | -3.13 µg/L/yr | 6 |
| Chlorophyll-a | ↑ Improving | -2.13 µg/L/yr | 6 |
EPA Impairment Status
Ogrens Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN13-0011-00 · Official waterbody report
County Ranking
Ranked #29 of 30 lakes in Chisago County
Nearby Lakes With Higher Grades
Ogrens Lake holds Grade F. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Chisago County
Frequently asked questions about Ogrens Lake
What is the water quality grade for Ogrens Lake?
- Ogrens Lake in Chisago County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 2.6 ft visibility. Phosphorus: 56 µg/L. Chlorophyll-a (algae): 35 µg/L. Maximum depth: 41 ft. Surface area: 48.22 acres.
Is Ogrens 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. Ogrens Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 35 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Ogrens Lake?
- Ogrens Lake typically sits around 75°F at the surface in August, from 25 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Ogrens Lake?
- Ogrens Lake has a maximum depth of 41 feet. The lake covers 48.22 acres.
Explore Ogrens Lake across LakeGrade
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Where this data comes from
43 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA43 samples · 2020–2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
- 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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder