Chub Lake
Chub Lake in Dakota County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.5 ft visibility. Maximum depth: 10 ft. Surface area: 228.02 acres.
- Clarity
- 0.5 ft
- Typical in August
- 76°F
- Max depth
- 10 ft
- Area
- 228 acres
- Trend
- ↑ Improving
- Public access
- No
Next lake in Dakota County
Why Chub 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 Chub Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not 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.
Chub Lake is a 228-acre lake in Dakota County, Minnesota with a maximum depth of 10 feet. Overall water quality is improving over recent sampling years. 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 2024-05-25. 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 Chub Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 0.5 ft of visibility. Trophic State Index: 87.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 87 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Chub Lake
Compare lakeside cabins, hotels, and vacation rentals near Chub Lake in Dakota 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 Chub Lake
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Water Temperature
Chub Lake typically sits around 76°F at the surface in August. Summer average is about 75°F. Usually warmest in Jul (about 81°F) and coldest in May (about 53°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 51 field readings (2010–2022) via the EPA Water Quality Portal. See the full Chub Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10 ft |
| Surface Area | 228 acres |
| Shoreline Length | 3.7 mi |
| Littoral Zone | 100% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Chub Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1985-08-05 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Green Sunfish | 91.00 | 0.1 lb |
| Black Bullhead | 83.60 | 0.17 lb |
| Common Carp | 0.60 | 3.4 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1985-08-05 survey
CARP WERE FOUND AT BELOW LOCAL MEDIAN NUMBERS. BLACK BULLHEAD AND GREEN SUNFISH WERE SAMPLED AT LEVELS MUCH ABOVE THE LOCAL MEDIANS. NO GAMEFISH WERE SAMPLED. SOUTHERN REDBELLY DACE, MIMIC SHINER FATHEAD MINNOW AND CENTRAL MUDMINNOW WERE SAMPLED BY SHORELINE SEINE.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Chub Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — ChubFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.15 m/yr | 2 |
EPA Impairment Status
Chub 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 MN19-0020-00 · Official waterbody report
Graded lakes near Chub Lake
Chub Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Dakota County
Frequently asked questions about Chub Lake
What is the water quality grade for Chub Lake?
- Chub Lake in Dakota County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.5 ft visibility. Maximum depth: 10 ft. Surface area: 228.02 acres.
Is Chub Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Chub Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Chub Lake?
- Chub Lake typically sits around 76°F at the surface in August, from 51 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
How deep is Chub Lake?
- Chub Lake has a maximum depth of 10 feet. The lake covers 228.02 acres.
Explore Chub Lake across LakeGrade
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Where this data comes from
15 measurements from 1 monitoring station, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA15 samples · 2022–2024
Analytical methods
- Field measurement/observation, generic method
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