Beach · Calvert County · MD
Is North Beach 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 North Beach right now
As of July 19, 2026, North Beach in Calvert 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 0.0 in, which can wash bacteria and nutrients into the water.
Blue-green algae at North Beach
North Beach is a lake in Calvert 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 North Beach
- Is it safe to swim in North Beach right now?
- North Beach 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 North Beach have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at North Beach. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in North Beach?
- No bloom is detected at North Beach 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 North Beach'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 North Beach, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.