Ralls County Lake Quality
Missouri, 2 lakes, measured by Missouri DNR
Ralls County has 2 monitored 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. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Ralls County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.
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. Mark Twain Lake Indian Creek Arm has the lowest nutrient and algae readings in the county.
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Quick Answers for Ralls County
Planning a trip? Check special fishing regulations for Mark Twain Lake Indian Creek Arm — or check the official Missouri fishing regulations.
All Lakes in Ralls County
2 lakes · 1 ranked on readings, 1 without enough sampling1 lake ranked on readings · 1 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| 1 | Mark Twain Lake Indian Creek ArmRalls | 3.8 ft | 31.5 µg/L | 14.2 µg/L | No recent samples | ✓ Public |
| Perry City LakeRalls | No recent samples | 240 µg/L | No recent samples | No recent samples | ✓ Public |
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.