Ada Lake
Cook County, Minnesota23 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Ada Lake. Here is what has been measured.
- 13 ft max depth
- Limited data
Ada Lake in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5.5 ft visibility. Maximum depth: 13 ft. Surface area: 23.49 acres.
Minnesota DNR's Standard Survey on July 1, 1975 caught 6.00 northern pike per gill net at Ada Lake. DNR survey details →
Ada Lake is a 23-acre lake in Cook County, Minnesota with a maximum depth of 13 feet. 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 2022-07-20. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Ada 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 Ada Lake
These are the measurements Minnesota PCA publishes for Ada Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.5 ft. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ada Lake
Answers come straight from the public measurements and survey records on this page.
Minnesota DNR's Standard Survey on July 1, 1975 caught 6.00 northern pike per gill net at Ada Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Ada Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1975-07-01 (Standard Survey).
1 survey on file · most recent 1975-07-01 (Standard Survey)
51 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| White Sucker | 10.00 | 2.9 lb | |
| Northern Pike | 6.00 | 1.92 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.
From the 1975-07-01 survey
Ada Lake contains some Suckers and N Pike which may receive moderate fishing pressure from passing canoists.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Ada Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — AdaFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
13 ft
Surface area
23 acres
Shoreline
1.6 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
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Fishing Ada Lake
Nearby Lakes in Cook County
Frequently asked questions about Ada Lake
Where is Ada Lake?
- Ada Lake is a lake in Cook County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Ada Lake?
- Ada Lake in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5.5 ft visibility. Maximum depth: 13 ft. Surface area: 23.49 acres.
Is Ada Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Ada Lake?
- Ada Lake has a maximum depth of 13 feet. The lake covers 23.49 acres.
What did the DNR fisheries survey find at Ada Lake?
- Minnesota DNR's Standard Survey on July 1, 1975 caught 6.00 northern pike per gill net at Ada Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Ada Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Ada Lake?
- Public access to Ada 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.
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Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2022
Analytical methods
- Field measurement/observation, generic method
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
Lake details from Minnesota DNR LakeFinder