08/01/2025 Health Advisory from Missoula Public Health and Parks and Recreation

Stay out of Bancroft Ponds and Cattail Corner- harmful algae detected

Immediate action required - keep people and pets away from:

• Bancroft Ponds (Bancroft and SW Higgins) – Harmful algae has been detected.
• Cattail Corner (Russell and 39th Street) – possible harmful algae detected.
• Harmful algae are naturally occurring microscopic organisms that can multiply rapidly in warm, stagnant water and produce toxins that are dangerous to humans, pets, and wildlife.

Critical - do not:

• Swim, wade, or touch the water.
• Let pets near the water (pets are always prohibited from swimming in city wetlands.)
• Allow children to play near the water's edge.

Harmful algae can make you seriously ill!

Symptoms include:

• Upset stomach
• Vomiting and diarrhea
• In severe cases: liver or kidney damage
• If you or family members get sick after being near the water, seek medical attention immediately.
• If your pet shows illness signs after being near the water, contact your veterinarian right away.

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