Will County Lake Quality
Illinois, 1 lakes, average grade D (Poor)
Only 1 lakes in Will County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. On average, Will County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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. Monee Lake (D) is the cleanest in the county.
Quick Answers for Will County
Planning a trip? Check special fishing regulations for Monee Lake — or check the official Illinois fishing regulations.
All Lakes in Will County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Monee Lake | D | 4.9 ft | 128 µg/L |
Other Counties in Illinois
See how Will County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Will County
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Source: EPA National Aquatic Resource Surveys, 2026.