Second Crow Wing Lake
Second Crow Wing Lake in Hubbard County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.3 ft visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 6.4 µg/L. Maximum depth: 35 ft. Surface area: 221.44 acres.
- Clarity
- 11.3 ft
- Typical in August
- 69°F
- Max depth
- 35 ft
- Area
- 221 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Hubbard County
Why Second Crow Wing 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 Second Crow Wing 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.
Second Crow Wing Lake is a 221-acre lake in Hubbard County, Minnesota with a maximum depth of 35 feet (14-foot average). Overall water quality is declining over recent sampling years. The lake supports 15 documented fish species including black crappie, bluegill, and bowfin (dogfish). No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-07-21. 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 Second Crow Wing Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 11.3 ft. Phosphorus level: 14 µg/L. Chlorophyll-a: 6.4 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.3 ft | Not graded |
| Phosphorus | 14 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.4 µg/L | Not graded |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Second Crow Wing Lake
Compare lakeside cabins, hotels, and vacation rentals near Second Crow Wing Lake in Hubbard 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.
Top-rated places to stay near Second Crow Wing Lake
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Water Temperature
Second Crow Wing Lake typically sits around 69°F at the surface in August. Summer average is about 68°F. Usually warmest in Aug (about 69°F) and coldest in Sep (about 62°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 36 field readings (2011–2025) via the EPA Water Quality Portal. See the full Second Crow Wing Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 35 ft |
| Average Depth | 14 ft |
| Surface Area | 221 acres |
| Shoreline Length | 3.1 mi |
| Littoral Zone | 44% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Second Crow Wing Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.045 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.67 µg/L/yr | 6 |
| Chlorophyll-a | ↓ Declining | +0.21 µg/L/yr | 6 |
EPA Impairment Status
Second 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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN29-0087-00 · Official waterbody report · Matched by proximity (1.52 km)
Graded lakes near Second Crow Wing Lake
Second Crow Wing Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Hubbard County
Frequently asked questions about Second Crow Wing Lake
What is the water quality grade for Second Crow Wing Lake?
- Second Crow Wing Lake in Hubbard County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.3 ft visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 6.4 µg/L. Maximum depth: 35 ft. Surface area: 221.44 acres.
Is Second Crow Wing Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Second Crow Wing Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 6.4 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Second Crow Wing Lake?
- Second Crow Wing Lake typically sits around 69°F at the surface in August, from 36 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
How deep is Second Crow Wing Lake?
- Second Crow Wing Lake has a maximum depth of 35 feet and an average depth of 14 feet. The lake covers 221.44 acres.
What fish are in Second Crow Wing Lake?
- Fish species found in Second Crow Wing Lake include black crappie, bluegill, bowfin (dogfish), brown bullhead, greater redhorse, largemouth bass, northern pike, pumpkinseed, river redhorse, rock bass, tullibee (cisco), walleye, white sucker, yellow bullhead, yellow perch. Second Crow Wing Lake is located in Hubbard County, Minnesota.
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Where this data comes from
6 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA6 samples · 2025
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder