Beach · Aleutians East County · AK
Is Inside Reef safe to swim?
Recent heavy rain may have spiked bacteria since the last clear sample.
Updated July 19, 2026 · Alaska beach program (EPA BEACON)
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Know before you get in at Inside Reef.
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Inside Reef right now
As of July 19, 2026, Inside Reef in Aleutians East County, Alaska carries a swim caution. 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 2.4 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Inside Reef
Inside Reef is a lake in Aleutians East 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 Inside Reef
- Is it safe to swim in Inside Reef right now?
- Inside Reef carries a swim caution 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 Inside Reef have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Inside Reef. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Inside Reef?
- No bloom is detected at Inside Reef 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 Inside Reef'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 Inside Reef, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.