Beach · Pierce County · WA
Is Northwest Narrows safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Washington beach program (EPA BEACON)
SwimZone for iPhone · launching soon
Know before you get in at Northwest Narrows.
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Northwest Narrows right now
As of July 19, 2026, Northwest Narrows in Pierce 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 0.4 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Northwest Narrows
Northwest Narrows is a lake in Pierce 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 Northwest Narrows
- Is it safe to swim in Northwest Narrows right now?
- Northwest Narrows 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 Northwest Narrows have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Northwest Narrows. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Northwest Narrows?
- No bloom is detected at Northwest Narrows 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 Northwest Narrows'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 Northwest Narrows, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.