Laddie Lake
Laddie Lake in Anoka County, Minnesota has a water quality grade of A (Excellent). Phosphorus: 22 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 4 ft. Surface area: 66.13 acres.
- Typical in August
- 78°F
- Max depth
- 4 ft
- Area
- 66 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- No
Next lake in Anoka County
Laddie Lake is a 66-acre mesotrophic lake in Anoka County, Minnesota with a maximum depth of 4 feet. Water quality is graded A based on 2 sampling years through 2025. 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. Grade methodology: LakeGrade methodology.
Watch Laddie Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
No clarity data. Phosphorus level: 22 µg/L. Chlorophyll-a: 3.6 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 22 µg/L | Good |
| Chlorophyll-a (Algae) | 3.6 µg/L | Good |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Laddie Lake
Compare lakeside cabins, hotels, and vacation rentals near Laddie Lake in Anoka 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 Laddie Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Water Temperature
Laddie Lake typically sits around 78°F at the surface in August. 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.
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 →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 4 ft |
| Surface Area | 66 acres |
| Shoreline Length | 1.4 mi |
| Littoral Zone | 99% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Laddie Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1983-09-19 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | 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, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
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
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -1.87 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -0.47 µg/L/yr | 3 |
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
Source: EPA ATTAINS assessment unit MN02-0072-00 · Official waterbody report
County Ranking
Ranked #6 of 23 lakes in Anoka County
Nearby Lakes in Anoka County
Frequently asked questions about Laddie Lake
What is the water quality grade for Laddie Lake?
- Laddie Lake in Anoka County, Minnesota has a water quality grade of A (Excellent). 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?
- Excellent for swimming, crystal clear water with minimal algae. Laddie Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3.6 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Laddie Lake?
- Laddie Lake typically sits around 78°F at the surface in August, 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.
Explore Laddie Lake across LakeGrade
Fish species and top-graded lakes across Minnesota
Fish species and best lakes in Anoka County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its grade
Lakes in the Rum River Watershed, ranked by water quality
Moderate nutrients, good water quality
Minnesota's cleanest and most-polluted lakes, ranked
More Minnesota Lake Rankings
State Parks Near Laddie Lake
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
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)
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