How Clean Is Jacksonville Lake?
Jacksonville Lake is algae-prone, with a higher bloom risk in warm months. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 1.8 ft. Phosphorus: 60.5 µg/L. Chlorophyll-a (algae): 42.2 µg/L. Trophic State Index: 66.
Cleanliness Snapshot
| Metric | Jacksonville Lake | Illinois avg |
|---|---|---|
| Water Clarity (Secchi) | 1.8 ft | — |
| Phosphorus | 60.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 42.2 µg/L | <10 = clean |
| Trophic State Index | 66 | <50 = clean |
How does Jacksonville Lake compare?
Jacksonville Lake's readings run above the Illinois state average. It ranks #1 of 2 lakes in Morgan County on nutrient and algae readings.
Stays via Stay22
Where to stay near Jacksonville Lake
Compare cabins, hotels, and vacation rentals near Jacksonville Lake in Morgan County, Illinois. Live availability and prices for your nights. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Jacksonville Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Jacksonville Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Jacksonville Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Jacksonville Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.