Grant County Lake Quality
Oregon, 8 lakes, measured by Oregon DEQ
Grant County holds 8 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. The 8 monitored lakes in Grant County carry whatever clarity, phosphorus, and chlorophyll-a readings Oregon DEQ has published, shown as reported.
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.
Where to stay near Grant County
Top-rated places to stay near Grant County
Prices for Oct 16–18, 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.
Planning a trip to Grant County?
Get lake water-quality updates plus the best cabin & lodging deals near Grant County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Grant County
Planning a trip? Check special fishing regulations for Sproul Reservoir — or check the official Oregon fishing regulations.
All Lakes in Grant County
8 lakes · 0 ranked on readings, 8 without enough sampling0 lakes ranked on readings · 8 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| Sproul ReservoirGrant | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Canyon Meadows LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Pronghorn ReservoirGrant | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Strawberry LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Magone LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| Olive LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| Bull Prairie LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| Buffalo LakeGrant | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of lakes that fit, with the water quality behind each one.
Other Counties in Oregon
Browse every Oregon lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: the Oregon Department of Environmental Quality. See data sources.