Beach · San Juan County · WA
Is Decatur Island County, Beach 323 safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Washington beach program (EPA BEACON)
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What's in the water at Decatur Island County, Beach 323 right now
As of July 19, 2026, Decatur Island County, Beach 323 in San Juan County, Washington 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 Decatur Island County, Beach 323
Decatur Island County, Beach 323 is a lake in San Juan County, Washington. 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 Decatur Island County, Beach 323
- Is it safe to swim in Decatur Island County, Beach 323 right now?
- Decatur Island County, Beach 323 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 Decatur Island County, Beach 323 have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Decatur Island County, Beach 323. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Decatur Island County, Beach 323?
- No bloom is detected at Decatur Island County, Beach 323 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 Washington lakes and beaches have swim advisories today?
- Today, 18 Washington waters are under a swim advisory and 9 more warrant caution, out of 1348 monitored waters SwimZone tracks in the state.
- How is Decatur Island County, Beach 323'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 Decatur Island County, Beach 323, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.