Normandale Lake
Normandale Lake in Hennepin County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.7 ft visibility. Phosphorus: 84 µg/L. Chlorophyll-a (algae): 16.2 µg/L. Surface area: 82 acres.
- Clarity
- 3.7 ft
- Typical in August
- 82°F
- Mean depth
- ~14 ft est.
- Area
- 82 acres
- Trend
- → Stable
- Public access
- Yes
Next lake in Hennepin County
Why Normandale Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Normandale Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Normandale Lake is a 82-acre lake in Hennepin County, Minnesota with an estimated average depth of about 14 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-21. Grade methodology: LakeGrade methodology.
Watch Normandale Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Normandale Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 3.7 ft. Phosphorus level: 84 µg/L. Chlorophyll-a: 16.2 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.7 ft | Not graded |
| Phosphorus | 84 µg/L | Not graded |
| Chlorophyll-a (Algae) | 16.2 µg/L | Not graded |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Normandale Lake
Compare lakeside cabins, hotels, and vacation rentals near Normandale Lake in Hennepin 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.
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Water Temperature
Normandale Lake typically sits around 82°F at the surface in August. Summer average is about 82°F. Usually warmest in May (about 87°F) and coldest in Oct (about 55°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 58 field readings (2010–2024) via the EPA Water Quality Portal. See the full Normandale Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~14 ft est. |
| Surface Area | 82 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Minnesota has not published bathymetry for Normandale Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Mount Normandale LakePublic
Fishing Normandale Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Normandale Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fish Stocking History — NormandaleFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — NormandalePublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.009 m/yr | 5 |
Reservoir Info (USACE NID)
Normandale Lake is a man-made reservoir impounded by the Normandale Lake (completed 1980), built primarily for flood risk reduction on the Ninemile Creek; earth-type dam, 7 ft tall.
- Surface area
- 82 ac
- Max storage
- 400 ac-ft
- Drainage area
- 33 sq mi
- Hazard class
- Low
- Owner
- City of Bloomington
Source: USACE National Inventory of Dams, NID ID MN01494 · Operator website
EPA Impairment Status
Normandale Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN27-0029-00 · Official waterbody report · Matched by proximity (2.24 km)
Graded lakes near Normandale Lake
Normandale Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Hennepin County
Frequently asked questions about Normandale Lake
What is the water quality grade for Normandale Lake?
- Normandale Lake in Hennepin County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.7 ft visibility. Phosphorus: 84 µg/L. Chlorophyll-a (algae): 16.2 µg/L. Surface area: 82 acres.
Is Normandale Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Normandale Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 16.2 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Normandale Lake?
- Normandale Lake typically sits around 82°F at the surface in August, from 58 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Normandale Lake?
- No published bathymetric survey covers Normandale Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 14 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 82 acres.
Are there boat ramps on Normandale Lake?
- Normandale Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Mount Normandale Lake. Public access is listed as yes.
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Where this data comes from
164 measurements from 4 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA164 samples · 2020–2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- Chlorophyll-a and Pheophytin in Water by Spectrophotometric Measurement of Ethanolic Extract from Filter Residue
- Turbidity, Probe Method
Monitoring station identifiers (4)
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
Named boat-access points from the USGS National Boat Ramps inventory