Beach · Ketchikan Gateway County · AK
Is Betton Island Marine Park (Proposed) safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Alaska beach program (EPA BEACON)
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Know before you get in at Betton Island Marine Park (Proposed).
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Betton Island Marine Park (Proposed) right now
As of July 19, 2026, Betton Island Marine Park (Proposed) in Ketchikan Gateway County, Alaska 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 0.1 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Betton Island Marine Park (Proposed)
Betton Island Marine Park (Proposed) is a lake in Ketchikan Gateway County, Alaska. 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 Betton Island Marine Park (Proposed)
- Is it safe to swim in Betton Island Marine Park (Proposed) right now?
- Betton Island Marine Park (Proposed) 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 Betton Island Marine Park (Proposed) have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Betton Island Marine Park (Proposed). Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Betton Island Marine Park (Proposed)?
- No bloom is detected at Betton Island Marine Park (Proposed) 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 Alaska lakes and beaches have swim advisories today?
- Today, 0 Alaska waters are under a swim advisory and 89 more warrant caution, out of 203 monitored waters SwimZone tracks in the state.
- How is Betton Island Marine Park (Proposed)'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 Betton Island Marine Park (Proposed), and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.