Johnson County Lake Quality
Missouri, 5 lakes, average grade C (Fair)
Johnson County has 5 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Rock Lake Village Lake (B); the most-stressed is Holden City Lake Nr. Dam (F).
Quick Answers for Johnson County
Planning a trip? Check special fishing regulations for Rock Lake Village Lake — or check the official Missouri fishing regulations.
All Lakes in Johnson County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Rock Lake Village Lake | B | 4.3 ft | 16 µg/L |
| 2 | Lake Buteo | B | 5.6 ft | 20 µg/L |
| 3 | Hazel Hill Lake by Dam | D | 2 ft | 59.3 µg/L |
| 4 | Holden City Lake Nr. Dam | F | 2 ft | 96 µg/L |
Other Counties in Missouri
See how Johnson County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Johnson County
Top-rated places to stay near Johnson 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 Johnson County?
Get lake water-quality report cards plus the best cabin & lodging deals near Johnson County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.