Windsor Lake
Weld County, Colorado197 acresView mapDirections
Colorado WQCD publishes the water-quality measurements for Windsor Lake. Here is what has been measured.
- Eutrophic
- 11 ft max depth
- Limited data
Windsor Lake in Weld County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 140 µg/L. Chlorophyll-a (algae): 25.4 µg/L. Surface area: 197 acres.
Windsor Lake is a 197-acre productive, nutrient-rich eutrophic lake in Weld County, Colorado with an estimated average depth of about 11 feet. Compared to the 4 other monitored lakes in Weld County, Windsor Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2020-09-02. Methodology: how these readings are compared.
Windsor Lake covers about 200 acres in Weld County. Vrbo is where to look for cabins and lake homes around Windsor Lake, and Booking.com and Expedia search hotels near the lake for your dates.
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Windsor Lake is safe to swim in today is a call for the Water Quality Control Division of the Colorado Department of Public Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Windsor Lake
These are the measurements Colorado WQCD publishes for Windsor Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2 ft of visibility. Phosphorus 140 µg/L. Chlorophyll-a 25.4 µg/L. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 140µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 25.4µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Windsor Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~11 ft est.
Surface area
197 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Colorado has not published bathymetry for Windsor Lake.
Lake Size & Watershed
Watershed (drainage) area
15 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.4 mi
HydroLAKES / HydroSHEDS
Elevation
4,797 ft
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.
Stays via Stay22
Stays near Windsor Lake
Compare lakeside cabins, hotels, and vacation rentals near Windsor Lake in Weld County, Colorado — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Windsor Lake are listed below.
Top-rated places to stay near Windsor Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
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Fishing Windsor Lake
Reservoir Info (USACE NID)
Windsor Lake is a man-made reservoir impounded by the Windsor Lake (completed 1904), built primarily for irrigation on the Cache La Poudre River-Os; earth-type dam, 11 ft tall and 2,250 ft long.
- Surface area
- 197 ac
- Normal storage
- 3,008 ac-ft
- Max storage
- 3,990 ac-ft
- Drainage area
- 4 sq mi
- Hazard class
- High
- Owner
- KERN RESERVOIR AND DITCH CO (WAGNER, DENNIS)
All listed purposes: Irrigation;Recreation.
Source: USACE National Inventory of Dams, NID ID CO00854 · Operator website
Nearby Lakes in Weld County
Frequently asked questions about Windsor Lake
Where is Windsor Lake?
- Windsor Lake is a lake in Weld County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Windsor Lake?
- Windsor Lake in Weld County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 140 µg/L. Chlorophyll-a (algae): 25.4 µg/L. Surface area: 197 acres.
Is Windsor Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Windsor Lake?
- No published bathymetric survey covers Windsor Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 11 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 197 acres.
Explore Windsor Lake across LakeQuality
11.8 mi away · cable-pulled, no boat wake
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Where this data comes from
16 measurements from 2 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado Dept. of Public Health & Environment-WQCD
21COL001_WQX16 samples · 2020
Analytical methods
- Secchi disk depth measurement
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Nitrogen in Water by Pyrolysis Detection
Monitoring station identifiers (2)
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 size & watershed from HydroLAKES (HydroSHEDS)