St. Francois County Lake Quality
Missouri, 10 lakes, measured by Missouri DNR
St. Francois County holds 10 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 4 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in St. Francois County carry favourable nutrient and algae readings for Missouri.
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. Lake Capri has the lowest nutrient and algae readings in the county.
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Quick Answers for St. Francois County
Planning a trip? Check special fishing regulations for Lake Capri — or check the official Missouri fishing regulations.
All Lakes in St. Francois County
10 lakes · 4 ranked on readings, 6 without enough sampling4 lakes ranked on readings · 6 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Lake CapriSt. Francois | 16.3 ft | 5.7 µg/L | 0.9 µg/L | No recent samples | No recent samples | Not recorded |
| 2 | Lake Marseilles-Terre du Lac LakesSt. Francois | 14.1 ft | 7.4 µg/L | 2.4 µg/L | No recent samples | No recent samples | Not recorded |
| 3 | Timberline LakesSt. Francois | 14.3 ft | 5.5 µg/L | 1.6 µg/L | No recent samples | No recent samples | Not recorded |
| 4 | Hemitite LakeSt. Francois | 1.1 ft | 186.9 µg/L | 91.9 µg/L | No recent samples | No recent samples | ✓ Public |
| Eugene D Nims LakeSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Deer Run LakeSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Lake PrimroseSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Iron Mountain LakeSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Pilot Knob LakeSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | 28.2 ft | Not recorded | |
| Lac CarmelSt. Francois | No recent samples | No recent samples | No recent samples | No recent samples | 65.6 ft | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Missouri Department of Natural Resources. See data sources.