Beach · Ottawa County · OH
Is East Harbor State Park safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Ohio beach program (EPA BEACON)
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What's in the water at East Harbor State Park right now
As of July 19, 2026, East Harbor State Park in Ottawa County, Ohio 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 0.2 in, which can wash bacteria and nutrients into the water.
Blue-green algae at East Harbor State Park
East Harbor State Park is a lake in Ottawa County, Ohio. 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 East Harbor State Park
- Is it safe to swim in East Harbor State Park right now?
- East Harbor State 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 East Harbor State Park have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at East Harbor State Park. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in East Harbor State Park?
- No bloom is detected at East Harbor State 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 Ohio lakes and beaches have swim advisories today?
- Today, 26 Ohio waters are under a swim advisory and 12 more warrant caution, out of 100 monitored waters SwimZone tracks in the state.
- How is East Harbor State 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 East Harbor State Park, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.