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Marin County

Muir Beach

3 sampling stations

Muir Beach in Marin County has 3 monitoring stations with official enterococcus lab testing. Today's rating: Low. Latest official lab sample: Sep 29, 2026.

  1. 1
    MUIR BEACH - CENTRAL
    MUIR BEACH - CENTRAL
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  2. 2
    MUIR BEACH - NORTH
    MUIR BEACH - NORTH
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  3. 3
    MUIR BEACH - SOUTH
    MUIR BEACH - SOUTH
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