Mattole Beach

Petrolia, California

At the mouth of the Mattole River, this secluded beach features open sand, miles of hiking, and a dog-friendly campground.

COVID-19

Keep your distance from other people.

Practicing social distancing is essential right now. Follow the advice of the health experts. If your community has asked that you remain indoors and away from others, do so. Heading to the beach should only be considered an option if social distancing practices can be followed. Spending a day in any crowded place is the worst thing we can do for our most vulnerable right now and will counter the efforts to curb the virus’ spread.

For more information, please visit the World Health Organization public resource on COVID-19.

Water Quality
  • No data available

  • Current Status
  • This status is based on the latest sample. Humboldt Baykeeper updates the status of this beach as soon as test results become available.
For water quality icon legend, click:  
Current Weather
13°C
Mostly clear
Monitoring Frequency

Mattole Beach is not sampled

Source Information

Beach water is tested weekly from April to October by the Humboldt County Environmental Monitoring Division. Results are posted online, and Humboldt Baykeeper updates the beach status information in Swim Guide as it is made available.

In California, maximum levels for bacteria are established for recreational waters. Single sample maximum levels are 235 E. coli/100 ml; 61 Enterococcus /100 ml; and 400 fecal coliform/100 ml; and 10,000 total coliform /100 ml. In waters designated for contact recreation, the median fecal coliform concentration based on a minimum of not less than five samples for any 30-day period shall not exceed 50/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400/100 ml. Monitoring frequency varies across jurisdictions.

Water Quality Graph

Mattole Beach

Petrolia, California

COVID-19

Keep your distance from other people.

Practicing social distancing is essential right now. Follow the advice of the health experts. If your community has asked that you remain indoors and away from others, do so. Heading to the beach should only be considered an option if social distancing practices can be followed. Spending a day in any crowded place is the worst thing we can do for our most vulnerable right now and will counter the efforts to curb the virus’ spread.

For more information, please visit the World Health Organization public resource on COVID-19.

Water Quality
  • No data available
  • Current Status
  • This status is based on the latest sample. Humboldt Baykeeper updates the status of this beach as soon as test results become available.
For water quality icon legend, click:  
Current Weather
13°C
Mostly clear

At the mouth of the Mattole River, this secluded beach features open sand, miles of hiking, and a dog-friendly campground.

Monitoring Frequency

Mattole Beach is not sampled

Source Information

Beach water is tested weekly from April to October by the Humboldt County Environmental Monitoring Division. Results are posted online, and Humboldt Baykeeper updates the beach status information in Swim Guide as it is made available.

In California, maximum levels for bacteria are established for recreational waters. Single sample maximum levels are 235 E. coli/100 ml; 61 Enterococcus /100 ml; and 400 fecal coliform/100 ml; and 10,000 total coliform /100 ml. In waters designated for contact recreation, the median fecal coliform concentration based on a minimum of not less than five samples for any 30-day period shall not exceed 50/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400/100 ml. Monitoring frequency varies across jurisdictions.

Water Quality Graph

  Beach Location Water Quality
Shelter Cove, California
, California
, California
, California
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