Cleanest Lakes in Mason County, Illinois
Sand Lake in Mason County leads the rankings on measured clarity and nutrients. Below are the top 20 cleanest monitored lakes in Mason County, Illinois, ranked on EPA nutrient and algae measurements.
Ranked List
| # | Lake | County | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|
| 1 | Sand Lake | Mason | - | - | - |
| 2 | Lake Chautauqua | Mason | - | - | - |
| 3 | Matanzas Lake | Mason | - | - | - |
| 4 | Bath Lake | Mason | - | - | - |
| 5 | Moscow Lake | Mason | - | - | - |
| 6 | Bell Lake | Mason | - | - | - |
| 7 | Jack Lake | Mason | - | - | - |
| 8 | Patterson Bay | Mason | - | - | - |
| 9 | Wolf Lake | Mason | - | - | - |
| 10 | River Swale | Mason | - | - | - |
| 11 | Mound Lake | Mason | - | - | - |
| 12 | Otter Lake | Mason | - | - | - |
| 13 | Wilcox Lake | Mason | - | - | - |
| 14 | Crane Lake | Mason | - | - | - |
| 15 | Cross Slough | Mason | - | - | - |
| 16 | Ingram Lake | Mason | - | - | - |
| 17 | Chain Lake | Mason | - | - | - |
| 18 | Liverpool Lake | Mason | - | - | - |
| 19 | Quiver Lake | Mason | - | - | - |
| 20 | Quiver Lake | Mason | - | - | - |
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