Beach · Monmouth County · NJ
Is Union Beach Boro at Rose Lane safe to swim?
Recent heavy rain may have spiked bacteria since the last clear sample.
Updated July 19, 2026 · New Jersey beach program (EPA BEACON)
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What's in the water at Union Beach Boro at Rose Lane right now
As of July 19, 2026, Union Beach Boro at Rose Lane in Monmouth County, New Jersey 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 Union Beach Boro at Rose Lane
Union Beach Boro at Rose Lane is a lake in Monmouth County, New Jersey. 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 Union Beach Boro at Rose Lane
- Is it safe to swim in Union Beach Boro at Rose Lane right now?
- Union Beach Boro at Rose Lane 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 Union Beach Boro at Rose Lane have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Union Beach Boro at Rose Lane. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Union Beach Boro at Rose Lane?
- No bloom is detected at Union Beach Boro at Rose Lane 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 New Jersey lakes and beaches have swim advisories today?
- Today, 4 New Jersey waters are under a swim advisory and 73 more warrant caution, out of 467 monitored waters SwimZone tracks in the state.
- How is Union Beach Boro at Rose Lane'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 Union Beach Boro at Rose Lane, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.