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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Greene County Lake Quality

Illinois, 3 lakes, measured by Illinois EPA

Greene County has 3 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. Most monitored lakes in Greene County are productive, shallow basins; each lake page shows its own phosphorus and chlorophyll-a readings beside the EPA condition class.

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 Greenfield Lake.

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All Lakes in Greene County

3 lakes · 1 ranked on readings, 2 without enough sampling1 lake ranked on readings · 2 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
1Greenfield LakeGreeneNo recent samples85.5 µg/L30 µg/LNo recent samplesNo recent samples✓ Public
Brushy LakeGreeneNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
White Hall ReservoirGreeneNo recent samplesNo recent samplesNo recent samplesNo recent samples31 ftNot 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 Illinois Environmental Protection Agency. See data sources.