Jumbo Reservoir is a productive, nutrient-rich eutrophic lake in Logan County, Colorado. Water quality is graded F based on 1 sampling years through 2021. Compared to the 2 other monitored lakes in Logan County, Jumbo Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Colorado DNR, last sampled 2021-09-21. Grade methodology: LakeGrade methodology.
Watch Jumbo Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2.1 ft of visibility. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Jumbo Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Jumbo Reservoir in Logan County, Colorado — live availability and prices for your trip.
Top-rated places to stay near Jumbo Reservoir
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 trip to Jumbo Reservoir?
Get lake water-quality report cards plus the best cabin & lodging deals near Jumbo Reservoir — straight to your inbox. No spam, unsubscribe anytime.
Fishing Jumbo Reservoir
Location
County Ranking
Ranked #2 of 3 lakes in Logan County
Nearby Lakes in Logan County
Explore Jumbo Reservoir across LakeGrade
More Colorado Lake Rankings
Other Grade F Lakes in Colorado
Eutrophic Lakes in Colorado
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-09-21
Monitoring stations: 1