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Offshore Wind Heavy Lift Marine Terminal Community Meeting, June 24

Details
Jennifer Kalt
Offshore Wind Energy
Created: 09 June 2026
The Humboldt Bay Harbor District's Community Advisory Committee for the Offshore Wind Heavy Lift Marine Terminal Project is hosting a public meeting with technical speakers, a panel of experts, and multiple stations at which participants can talk to engineers and environmental scientists that are designing/permitting the project. It will be a good opportunity to learn more about what is being proposed, and to think about the impacts that should be analyzed, how those impacts can best be minimized or mitigated, and project alternatives that could lessen these impacts. 
When: Wednesday, June 24, 5:30-7:30 pm
Where: Arcata Community Center (321 Dr. Martin Luther King Jr. Parkway)
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6PPD-Quinone in Urban Streams of Humboldt Bay, Lower Eel River, and Mad River Watersheds

Details
Wiyot Tribe Shawir Darrudaluduk and Humboldt Waterkeeper
Water Quality Program
Created: 22 April 2026
In 2020, 6PPD-quinone, the breakdown product of the tire preservative 6PPD, was identified as a major contributor to Urban Runoff Mortality Syndrome in the Puget Sound watershed, where adult Coho Salmon often die before spawning in areas with high concentrations of road runoff. Since then, studies have been done in San Francisco Bay, but little information is available beyond major metropolitan areas. This study is the first to examine concentrations of 6PPD-q in Humboldt County. 
Photo: Alex Juan sampling Jolly Giant Creek in Arcata for 6PPD-quinone. Photo by Audrey Jackson, Wiyot Tribe Shawir Darrudaluduk.
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Interactive Sea Level Rise Scenario Map

Details
Jennifer Kalt
Sea Level Rise
Created: 06 January 2026
Screenshot of sea level rise map with link to the interactive mapHas Saturday's highest King Tide on record gotten you wondering how our neighborhoods, roads, and open space will fare as sea level rises? Now you check out our interactive map of two sea level rise scenarios for the Humboldt Bay Area! Featured are scenarios showing 1- and 2-meters above Year 2000 water levels. For many years, these have been static maps with no simple way for the public to examine points of interest. Now, people wondering if their neighborhood is at risk can zoom in on locations and see street names, etc. 
King Tides are usually a time to consider how high a typical high tide will be with one foot of sea level rise, but this weekend's high tides were nearly three feet higher than the Mean Higher High Water at the North Spit. Note that this is the preliminary water level from the National Weather Service, which will verify that figure in a few weeks.
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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!
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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
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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

  • New Humboldt Bay Planning Document Looks to the Future, With Guidelines for Sea Level Rise and Port Development
  • Don’t move the seal: Pupping season means young left while mom forages
  • Arcata fire debris removal gets the go-ahead to begin
  • Water Board Tosses HRC's Proposed Regulation Changes for Elk River Because Sediment Levels Are Not Improving
  • Eureka takes steps to prevent offshore drilling support
  • River otters use various hunting strategies at Arcata Marsh
  • A rash of mountain lion sightings near Eureka may be technology’s fault
  • Record ocean heat off California coast echoes ‘The Blob,’ killing seabirds and reshaping weather outlook
  • Sewage Keeps Spilling Into Humboldt Bay. It’s Hurting Oyster Farmers
  • Oregon regulators hit Pacific Seafood with $3.2 million environmental penalty
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