Bonneville County Lake Quality
Idaho, 7 lakes, average grade B (Good)
Only 7 lakes in Bonneville County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Bonneville County sits comfortably above the {{stateName}} median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Ririe Reservoir (A) is the cleanest in the county.
Quick Answers for Bonneville County
Planning a trip? Check special fishing regulations for Ririe Reservoir — or check the official Idaho fishing regulations.
All Lakes in Bonneville County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Ririe Reservoir | A | - | 19 µg/L |
| 2 | Pasisades Reservoir | A | 10.5 ft | 15 µg/L |
| 3 | Palisades Reservoir | A | 12.5 ft | 18 µg/L |
| 4 | Palisades Lake | B | 13.1 ft | 20.5 µg/L |
| 5 | Ririe Lake | D | 4.6 ft | 60 µg/L |
Other Counties in Idaho
See how Bonneville County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Bonneville County
Top-rated places to stay near Bonneville County
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 Bonneville County?
Get lake water-quality report cards plus the best cabin & lodging deals near Bonneville County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.