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How You Can Protect the Night Sky & Prevent Light Pollution

Details
Jennifer Kalt
Uncategorised
Created: 03 November 2025
Humboldt County's new Outdoor Lighting Ordinance has many people asking, “How can I protect the night sky?”
To protect the night sky, choose lighting that is fully shielded, directed downward, and turns off when not needed. Brightness is 1,000 lumens or less, and the color temperature is warm (2,700 K or less).
For info on adding shielding to existing fixtures, buying fully-shielded fixtures, and more, check out our new flier: How to Protect the Night Sky & Prevent Light Pollution!
Read more …

Introducing the Digital Humboldt Bay Water Trail Map!

Details
Jennifer Kalt
Bay Tours
Created: 25 August 2025
We are excited to announce the first digital version of the Humboldt Bay Water Trail map! The original Water Trail Map was developed by Redwood Community Action Agency in 2004.
Humboldt Waterkeeper has breathed new life into the map, updating it with more accurate data on tidal mudflats and channel depths from NOAA’s navigational charts, and crowd-sourcing updates on the best boat launches.
You can download our georeferenced PDF for mobile apps like Avenza, or access the interactive webmap directly in any browser.

Eating Local Fish Safely: Humboldt Bay Mercury Assessment, Phase II

Details
Jennifer Kalt
Mercury in Local Fish & Shellfish
Created: 15 July 2021
Our second study of mercury in local fish focused on nine species from nearshore coastal waters, including Pacific Halibut and several species of rockfish. We also sampled more Lingcod and California Halibut to add to the findings from our 2018 study. We found that most local fish are safe to eat in moderation—with a few exceptions.
Download our mercury fliers in English, Spanish, or Hmong:
Recommendations for Eating Local Fish Safely
Comiendo Pescado Con Seguridad Pautas
Yuav Ua Li Cas Noj Ntses Yam Xyuam Xim Cov Txhooj Cai Rau Humboldt Bay
 
Pocket-sized images for handy reference (click to print or download to your phone):
Women <45 and Children             
Women >45 and Men
Read more …

Safety Tips for Cleaning & Cooking Dungeness Crab

Details
HBK
Wildlife
Created: 26 April 2009

The beginning of Dungeness crab season is always a time to celebrate, but with major concerns over the last few years regarding unsafe domoic acid levels, state health department officials continue to recommend not eating the internal organs (known as "crab butter"). 

Click HERE to download the brochure explaining this simple method of cleaning crabs before cooking to reduce your exposure to unsafe contaminants, including dioxins.
The good news is that Dungeness crab are low in mercury - see our 2021 mercury guidelines for more info.
Read more …
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In The News

  • Is the Humboldt County coast ready for king tides, storm surge, and super El Niño this winter?
  • Planning for Sea Level Rise Splits County Planning Commission
  • Prop. 45 puts clean water and more at risk: Vote no.
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  • Who Controls the California Coast? SpaceX, Oil and a Fight Over Coastal Power
  • Researchers Found Almost Triple the Normal Number of Dead Marine Mammals on North Coast Beaches Last Month
  • How the Trump administration could limit California’s power over its own coastline
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