Beach · Lake County · IL
Is Illinois Beach State Park Sailing Beach safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Illinois beach program (EPA BEACON)
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What's in the water at Illinois Beach State Park Sailing Beach right now
As of July 19, 2026, Illinois Beach State Park Sailing Beach in Lake County, Illinois is clear to swim. Blue-green algae are not currently monitored at this water. No fecal-bacteria advisory is posted (state beach program). Rainfall over the past week totaled 0.0 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Illinois Beach State Park Sailing Beach
Illinois Beach State Park Sailing Beach is a lake in Lake County, Illinois. Blue-green algae are not currently monitored at this water.
Blue-green algae (cyanobacteria) blooms are most common from midsummer into early fall, when the water is warm, calm, and rich in nutrients from runoff. They can produce toxins that make people sick and can be rapidly fatal to dogs, so skip water that looks green, scummy, or like spilled paint, and keep children and pets out of it.
Frequently asked: swimming in Illinois Beach State Park Sailing Beach
- Is it safe to swim in Illinois Beach State Park Sailing Beach right now?
- Illinois Beach State Park Sailing Beach is clear to swim today. Blue-green algae are not currently monitored at this water. Conditions can change quickly with wind, heat, and rain, so check the posted signs and look at the water before you get in.
- Does Illinois Beach State Park Sailing Beach have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Illinois Beach State Park Sailing Beach. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Illinois Beach State Park Sailing Beach?
- No bloom is detected at Illinois Beach State Park Sailing Beach today, but dogs are much more vulnerable to blue-green algae than people, and blooms can form within hours. Always keep dogs away from water that looks green, scummy, or discolored, and rinse them off after swimming.
- How many Illinois lakes and beaches have swim advisories today?
- Today, 53 Illinois waters are under a swim advisory and 7 more warrant caution, out of 138 monitored waters SwimZone tracks in the state.
- How is Illinois Beach State Park Sailing Beach's water quality measured?
- SwimZone builds this read from EPA CyAN satellite imagery for blue-green algae, official beach and fecal-bacteria advisories where a program monitors Illinois Beach State Park Sailing Beach, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.