Seventh Crow Wing Lake
Hubbard County, Minnesota262 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Seventh Crow Wing Lake. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- 42 ft max depth
Seventh Crow Wing Lake in Hubbard County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 6.9 ft visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 7.6 µg/L. Maximum depth: 42 ft. Surface area: 262.4 acres.
Minnesota DNR's Standard Survey on July 29, 2024 caught 7.00 walleye per gill net at Seventh Crow Wing Lake. Length samples in the latest survey that recorded them ran 7–27 inches. DNR survey details →
Seventh Crow Wing Lake is a 262-acre productive, nutrient-rich eutrophic lake in Hubbard County, Minnesota with a maximum depth of 42 feet (16-foot average). Overall water quality is improving over recent sampling years. The lake supports 14 documented fish species including black crappie, bluegill, and bowfin (dogfish). No public access — the lake is private or restricted. Compared to the 67 other monitored lakes in Hubbard County, Seventh Crow Wing Lake ranks #63 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-22. Methodology: how these readings are compared.
Seventh Crow Wing Lake covers about 260 acres in Hubbard County. Vrbo is where to look for cabins and lake homes around Seventh Crow Wing Lake, and Booking.com and Expedia search hotels near the lake for your dates.
What Seventh Crow Wing Lake is good for
From access and monitoring records, not editorial picks.
- Fishing14 species recorded
- Deep water42 ft surveyed max depth
Swimming conditions
Readings onlyModerate algae
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. Seventh Crow Wing Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Seventh Crow Wing 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 Seventh Crow Wing Lake
These are the measurements Minnesota PCA publishes for Seventh Crow Wing Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 6.9 ft. Phosphorus 25 µg/L. Chlorophyll-a 7.6 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 25µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 7.6µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 50 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Seventh Crow Wing Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Seventh Crow Wing Lake typically sits around 63°F at the surface in September. Summer average is about 70°F. Usually warmest in Aug (about 73°F) and coldest in May (about 55°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (55°F) to its warmest (73°F).
Typical surface water temperature by month, from 46 field readings (2011–2024) via the EPA Water Quality Portal. See the full Seventh Crow Wing Lake water temperature breakdown →
Minnesota DNR's Standard Survey on July 29, 2024 caught 7.00 walleye per gill net at Seventh Crow Wing Lake. Length samples in the latest survey that recorded them ran 7–27 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Seventh Crow Wing Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2024-07-29 (Standard Survey).
12 surveys on file · most recent 2024-07-29 (Standard Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Yellow Perch | 21.48 | 3–10 in 2024-07-29 | 0.11 lb |
| Bluegill | 16.43 | 3–8 in 2024-07-29 | 0.24 lb |
| Pumpkinseed | 7.03 | 3–8 in 2024-07-29 | 0.18 lb |
| Walleye | 4.80 | 7–27 in 2024-07-29 | 2.42 lb |
| Largemouth Bass | 4.76 | 5–19 in 2024-07-29 | 0.98 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Yellow Perch
Bluegill
Pumpkinseed
Walleye
From the 2024-07-29 survey
Seventh Crow Wing Lake is located two miles southeast of Nevis in southern Hubbard County. Seventh Crow Wing is part of a chain of lakes running from Eleventh Crow Wing Lake at the headwaters, down to First Crow Wing Lake. Seventh Crow Wing Lake has a surface area of 261 acres and a maximum depth of 42 feet. A…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Seventh Crow Wing Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — Seventh Crow WingFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Seventh Crow Wing (1312)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — Seventh Crow WingFish Stocking History · MN DNR LakeFinder
Lake Details
Max depth
42 ft
Average depth
16 ft
Surface area
262 acres
Shoreline
3.2 mi
Littoral zone
46%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
42 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,375 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Seventh Crow Wing Lake
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Top-rated places to stay near Seventh Crow Wing Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Seventh Crow Wing Lake
- → Seventh Crow Wing Lake fishing: DNR survey catch rates, species & stocking
- → Seventh Crow Wing Lake fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Seventh Crow Wing Lake fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Seventh Crow Wing Lake? (mercury & PFAS guide)
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Improving-1.33 µg/L/yr6 years
Chlorophyll-a
Stable-0.12 µg/L/yr6 years
EPA Impairment Status
Seventh Crow Wing Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN29-0091-00 · Official waterbody report
Nearby Lakes in Hubbard County
Frequently asked questions about Seventh Crow Wing Lake
Where is Seventh Crow Wing Lake?
- Seventh Crow Wing Lake is a lake in Hubbard County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Seventh Crow Wing Lake?
- Seventh Crow Wing Lake in Hubbard County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 6.9 ft visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 7.6 µg/L. Maximum depth: 42 ft. Surface area: 262.4 acres.
Is Seventh Crow Wing Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Seventh Crow Wing Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
What is the water temperature of Seventh Crow Wing Lake?
- Seventh Crow Wing Lake typically sits around 63°F at the surface in September, from 46 EPA Water Quality Portal field readings (2011–2024). That is a typical value for the month, not a live reading.
How deep is Seventh Crow Wing Lake?
- Seventh Crow Wing Lake has a maximum depth of 42 feet and an average depth of 16 feet. The lake covers 262.4 acres.
What fish are in Seventh Crow Wing Lake?
- Fish species found in Seventh Crow Wing Lake include black crappie, bluegill, bowfin (dogfish), brown bullhead, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, tullibee (cisco), walleye, white sucker, yellow bullhead, yellow perch. Seventh Crow Wing Lake is located in Hubbard County, Minnesota.
What did the DNR fisheries survey find at Seventh Crow Wing Lake?
- Minnesota DNR's Standard Survey on July 29, 2024 caught 7.00 walleye per gill net at Seventh Crow Wing Lake. Length samples in the latest survey that recorded them ran 7–27 inches. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Seventh Crow Wing Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Seventh Crow Wing Lake?
- Public access to Seventh Crow Wing Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
Explore Seventh Crow Wing Lake across LakeQuality
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Where this data comes from
87 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA87 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent 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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder