Beach · Barnstable County · MA
Is Popponesset Beach Association (Bluff Ave.) safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Massachusetts beach program (EPA BEACON)
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Know before you get in at Popponesset Beach Association (Bluff Ave.).
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Popponesset Beach Association (Bluff Ave.) right now
As of July 19, 2026, Popponesset Beach Association (Bluff Ave.) in Barnstable County, Massachusetts 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 0.9 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Popponesset Beach Association (Bluff Ave.)
Popponesset Beach Association (Bluff Ave.) is a lake in Barnstable County, Massachusetts. 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 Popponesset Beach Association (Bluff Ave.)
- Is it safe to swim in Popponesset Beach Association (Bluff Ave.) right now?
- Popponesset Beach Association (Bluff Ave.) 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 Popponesset Beach Association (Bluff Ave.) have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Popponesset Beach Association (Bluff Ave.). Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Popponesset Beach Association (Bluff Ave.)?
- No bloom is detected at Popponesset Beach Association (Bluff Ave.) 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 Massachusetts lakes and beaches have swim advisories today?
- Today, 5 Massachusetts waters are under a swim advisory and 229 more warrant caution, out of 608 monitored waters SwimZone tracks in the state.
- How is Popponesset Beach Association (Bluff Ave.)'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 Popponesset Beach Association (Bluff Ave.), and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.