Bass Lake
Lee County, IllinoisView mapDirections
Illinois EPA publishes the water-quality measurements for Bass Lake. Here is what has been measured.
- Limited data
Bass Lake in Lee County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 8.1 ft visibility.
Bass Lake is a lake in Lee County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2021-07-13. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Bass Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Bass Lake
These are the measurements Illinois EPA publishes for Bass Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 8.1 ft. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Bass Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Bass Lake
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Fishing Bass Lake
Reservoir Info (USACE NID)
Bass Lake is a man-made reservoir impounded by the Bass Lake Dam (completed 1971), built primarily for recreation on the TRIB GREEN RIVER; earth-type dam, 11 ft tall and 472 ft long.
- Normal storage
- 49 ac-ft
- Max storage
- 186 ac-ft
- Hazard class
- Low
- Owner
- WOODHAVEN ASSOCIATION
Source: USACE National Inventory of Dams, NID ID IL00500 · Operator website
Nearby Lakes in Lee County
Frequently asked questions about Bass Lake
Where is Bass Lake?
- Bass Lake is a lake in Lee County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Bass Lake?
- Bass Lake in Lee County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 8.1 ft visibility.
Is Bass Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
1 measurement from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2021
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.