Chippewa Flowage -Moore'S Bay Lake
Sawyer County, WisconsinEutrophic
Chippewa Flowage -Moore'S Bay Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. Chippewa Flowage -Moore'S Bay Lake is unusually deep for Wisconsin at 92 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 14,593 acres, Chippewa Flowage -Moore'S Bay Lake is one of the larger lakes in Sawyer County, with partial shoreline records supporting multiple distinct use patterns. Within the 50 graded lakes of Sawyer County, Chippewa Flowage -Moore'S Bay Lake sits at rank 42, near the bottom of the county list.
Eurasian watermilfoil is established at Chippewa Flowage -Moore'S Bay Lake, which can dampen recreational access and pressure the native plant community. The fishery includes walleye among the lake's 8 documented species — a notable draw for Wisconsin anglers. The grade is supported by multiple sampling years from the Wisconsin DNR Citizen Lake Monitoring Network, giving the letter a reasonably stable foundation.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 4.1 ft. Phosphorus level: 40 µg/L. Chlorophyll-a: 8.1 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.1 ft | D |
| Phosphorus | 40 µg/L | C |
| Chlorophyll-a (Algae) | 8.1 µg/L | B |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 92 ft |
| Surface Area | 14.6K acres |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Chippewa Flowage -Moore'S Bay Lake (14-day solunar calendar)
→ Is it safe to eat fish from Chippewa Flowage -Moore'S Bay Lake? (mercury & PFAS guide)
→ Chippewa Flowage -Moore'S Bay 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: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.316 m/yr | 4 |
| Phosphorus | ↓ Declining | +5.75 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -0.9 µg/L/yr | 2 |
Location
County Ranking
Ranked #42 of 50 lakes in Sawyer County
Cleaner Lakes Within 30 Miles
Chippewa Flowage -Moore'S Bay Lake holds Grade C. 5 nearby lakes hold higher grades.
- ALost LakeSawyer County · mi · Two grade letters higher (C → A)
- AMud LakeSawyer County · mi · Two grade letters higher (C → A)
- BCallahan LakeSawyer County · mi · Higher grade (C → B)
- BChippewa Flowage LakeSawyer County · mi · Higher grade (C → B)
- CChippewa Flowage -Pokegema LakeSawyer County · mi · Higher overall water quality score
Nearby Lakes in Sawyer County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Compare Chippewa Flowage -Moore'S Bay Lake With Nearby Lakes
Sawyer County · Grade C
Sawyer County · Grade C
Sawyer County · Grade B
Sawyer County · Grade C
Sawyer County · Grade A
Sawyer County · Grade C
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 9 stations on file (most recent sample 2020).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-12
Monitoring stations: 1