Little Waverly Lake
Wright County, MinnesotaHypereutrophic
Little Waverly Lake earns an F: 673 µg/L of phosphorus and clarity at 1.2 ft signal heavy nutrient loading from the surrounding watershed. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.
Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. At only 12 ft deep, Little Waverly Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Little Waverly Lake covers 338 acres alongside 3.8 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 64 graded lakes of Wright County, Little Waverly Lake sits at rank 58, near the bottom of the county list.
Little Waverly Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Walleye are documented at Little Waverly Lake, one of 16 fish species on record for the lake. A documented public access point at Little Waverly Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 9 observed ice-outs, centered near Mar 30. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-15. Grade methodology: LakeGrade methodology.
Track Little Waverly Lake
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.2 ft of visibility. Phosphorus level: 672.5 µg/L. Trophic State Index: 86.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 ft | F |
| Phosphorus | 672.5 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 86 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 ft |
| Average Depth | 6.7 ft |
| Surface Area | 338.01 acres |
| Shoreline Length | 3.8 mi |
| Littoral Zone | 100% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Little Waverly Lake (14-day solunar calendar)
→ Is it safe to eat fish from Little Waverly Lake? (mercury & PFAS guide)
→ Little Waverly Lake fishing regulations (limits, seasons, special rules)
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 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.243 m/yr | 5 |
| Phosphorus | ↓ Declining | +66.1 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (17 observations).
Estimated open water season: 243 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-13 (2016) | 2018-05-01 (2018) |
| Ice-In | 2014-11-10 (2014) | 2016-12-07 (2016) |
Most recent ice-out: 2018-05-01
Location
County Ranking
Ranked #58 of 64 lakes in Wright County
Cleaner Lakes Within 30 Miles
Little Waverly Lake holds Grade F. 4 nearby lakes hold higher grades.
- BWaverly LakeWright County · mi · Two grade letters higher (F → B)
- BMary LakeWright County · mi · Two grade letters higher (F → B)
- DHoward LakeWright County · mi · Higher grade (F → D)
- DAnn LakeWright County · mi · Higher grade (F → D)
Nearby Lakes in Wright County
More Minnesota Lake Rankings
State Parks Near Little Waverly Lake
Other Grade F Lakes in Minnesota
DNR Fisheries Survey Summary
8 surveys on file from MN DNR Fisheries. Most recent: 2024-09-03 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 27.56 | 1.81 lb |
| Green Sunfish | 25.91 | 0.1 lb |
| Black Bullhead | 23.85 | 0.63 lb |
| GOS | 21.74 | 0.09 lb |
| Black Crappie | 16.92 | 0.27 lb |
| Yellow Perch | 15.34 | 0.12 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
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.
Largemouth Bass
Green Sunfish
Black Bullhead
GOS
From the 2024-09-03 survey
A targeted survey of nearshore fish species in Little Waverly Lake, was conducted on September 3 - September 9, 2024, by Index of Biological Integrity (IBI) Program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine,…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Little Waverly Lake. 2 reports on file.
- —Fisheries Lake Survey — Little WaverlyFisheries Lake Survey · MN DNR LakeFinder
- —Public Water Access Sites — Little WaverlyPublic Water Access Sites · MN DNR LakeFinder
Reservoir Info (USACE NID)
Little Waverly Lake is a man-made reservoir impounded by the Little Waverly Lake (completed 1938), built primarily for recreation on the Twelvemile Creek; gravity-type dam, 7 ft tall and 81 ft long.
- Surface area
- 330 ac
- Normal storage
- 1,946 ac-ft
- Max storage
- 2,780 ac-ft
- Drainage area
- 59.9 sq mi
- Hazard class
- Low
- Owner
- MNDNR
Source: USACE National Inventory of Dams, NID ID MN00403 · Operator website
EPA Impairment Status
Little Waverly Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN86-0106-00 · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2024-09-15
Monitoring stations: 2