Macon County Lake Quality
Illinois, 2 lakes, measured by Illinois EPA
Macon County holds 2 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Phosphorus and algae readings vary widely across Macon County; the per-lake pages below carry the numbers.
The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Decatur Lake.
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Quick Answers for Macon County
Planning a trip? Check special fishing regulations for Decatur Lake — or check the official Illinois fishing regulations.
All Lakes in Macon 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 | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Decatur LakeMacon | 1.3 ft | 103 µg/L | 25 µg/L | No recent samples | No recent samples | ✓ Public |
| Lake DecaturMacon | No recent samples | No recent samples | No recent samples | No recent samples | 28 ft | ✓ 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 Illinois Environmental Protection Agency. See data sources.