Laddie Lake
Anoka County, Minnesota66 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Laddie Lake. Here is what has been measured.
- Mesotrophic
- Impaired · Salinity / chlorides
- 4 ft max depth
Laddie Lake in Anoka County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 4 ft. Surface area: 66.13 acres.
Minnesota DNR's Standard Survey on September 19, 1983 caught 0.40 largemouth bass per trap net at Laddie Lake. DNR survey details →
Laddie Lake is a 66-acre mesotrophic lake in Anoka County, Minnesota with a maximum depth of 4 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 22 other monitored lakes in Anoka County, Laddie Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-25. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Laddie Lake is listed impaired under Clean Water Act §303(d) (IR 5) for salinity / chlorides. Check local advisories before you swim.
Whether Laddie 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 Laddie Lake
These are the measurements Minnesota PCA publishes for Laddie Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 22 µg/L. Chlorophyll-a 3.6 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 22µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 3.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Laddie Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Laddie Lake typically sits around 69°F at the surface in September. Summer average is about 77°F. Usually warmest in Jul (about 80°F) and coldest in Apr (about 45°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (45°F) to its warmest (80°F).
Typical surface water temperature by month, from 52 field readings (2011–2022) via the EPA Water Quality Portal. See the full Laddie Lake water temperature breakdown →
Minnesota DNR's Standard Survey on September 19, 1983 caught 0.40 largemouth bass per trap net at Laddie Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Laddie Lake’s water-quality measurements separately, and the water-quality trend over 3 years of monitoring is improving. 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: 1983-09-19 (Standard Survey).
1 survey on file · most recent 1983-09-19 (Standard Survey)
43 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Black Crappie | 142.60 | 0.07 lb | |
| Green Sunfish | 8.00 | 0.08 lb | |
| Bluegill | 4.00 | 0.43 lb | |
| Hybrid Sunfish | 1.00 | 0.2 lb | |
| Pumpkinseed | 0.80 | 0.25 lb | |
| Black Bullhead | 0.60 | 0.13 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 1983-09-19 survey
GREEN SUNFISH, BLACK CRAPPIE AND HYBRID SUNFISH WERE FOUND AT ABOVE LOCAL MEDIAN NUMBERS. BLACK BULLHEAD, PUMPKINSEED AND BLUEGILL WERE FOUND AT BELOW LOCAL MEDIAN LEVELS. LARGEMOUTH BASS WERE PRESENT. BLUEGILL AND LARGEMOUTH BASS ARE THE RE- SULT OF THE 1982 AND 1983 STOCKING.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Laddie Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — LaddieFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
4 ft
Surface area
66 acres
Shoreline
1.4 mi
Littoral zone
99%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Elevation
889 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Laddie Lake
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Top-rated places to stay near Laddie Lake
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Fishing Laddie Lake
Water quality readings over time
3 seasons of samples on record (2020–2025). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-1.87 µg/L/yr3 years
Chlorophyll-a
Improving-0.47 µg/L/yr3 years
EPA Impairment Status
Laddie Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit MN02-0072-00 · Official waterbody report
Nearby Lakes in Anoka County
Frequently asked questions about Laddie Lake
Where is Laddie Lake?
- Laddie Lake is a lake in Anoka County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Laddie Lake?
- Laddie Lake in Anoka County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 4 ft. Surface area: 66.13 acres.
Is Laddie Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Laddie Lake is listed impaired under Clean Water Act §303(d) (IR 5) for salinity / chlorides. Check local advisories before you swim.
What is the water temperature of Laddie Lake?
- Laddie Lake typically sits around 69°F at the surface in September, from 52 EPA Water Quality Portal field readings (2011–2022). That is a typical value for the month, not a live reading.
How deep is Laddie Lake?
- Laddie Lake has a maximum depth of 4 feet. The lake covers 66.13 acres.
What did the DNR fisheries survey find at Laddie Lake?
- Minnesota DNR's Standard Survey on September 19, 1983 caught 0.40 largemouth bass per trap net at Laddie Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Laddie Lake’s water-quality measurements separately, and the water-quality trend over 3 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Laddie Lake?
- Public access to Laddie 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.
Explore Laddie Lake across LakeQuality
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Where this data comes from
47 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA47 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated Ascorbic Acid Method
- 10200 H ~ Chlorophyll a-b-c Determination
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder