Beach · Anne Arundel County · MD
Is Cape St. Claire at Persimmon Point safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Maryland beach program (EPA BEACON)
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What's in the water at Cape St. Claire at Persimmon Point right now
As of July 19, 2026, Cape St. Claire at Persimmon Point in Anne Arundel County, Maryland 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 0.6 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Cape St. Claire at Persimmon Point
Cape St. Claire at Persimmon Point is a lake in Anne Arundel County, Maryland. 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 Cape St. Claire at Persimmon Point
- Is it safe to swim in Cape St. Claire at Persimmon Point right now?
- Cape St. Claire at Persimmon Point 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 Cape St. Claire at Persimmon Point have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Cape St. Claire at Persimmon Point. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Cape St. Claire at Persimmon Point?
- No bloom is detected at Cape St. Claire at Persimmon Point 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 Maryland lakes and beaches have swim advisories today?
- Today, 0 Maryland waters are under a swim advisory and 10 more warrant caution, out of 66 monitored waters SwimZone tracks in the state.
- How is Cape St. Claire at Persimmon Point'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 Cape St. Claire at Persimmon Point, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.