Beach · Iosco County · MI
Is Au Sable Township Shoreline Park safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Michigan beach program (EPA BEACON)
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What's in the water at Au Sable Township Shoreline Park right now
As of July 19, 2026, Au Sable Township Shoreline Park in Iosco County, Michigan 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 0.4 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Au Sable Township Shoreline Park
Au Sable Township Shoreline Park is a lake in Iosco County, Michigan. 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 Au Sable Township Shoreline Park
- Is it safe to swim in Au Sable Township Shoreline Park right now?
- Au Sable Township Shoreline Park 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 Au Sable Township Shoreline Park have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Au Sable Township Shoreline Park. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Au Sable Township Shoreline Park?
- No bloom is detected at Au Sable Township Shoreline Park 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 Michigan lakes and beaches have swim advisories today?
- Today, 47 Michigan waters are under a swim advisory and 120 more warrant caution, out of 882 monitored waters SwimZone tracks in the state.
- How is Au Sable Township Shoreline Park'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 Au Sable Township Shoreline Park, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.