Green Lake Beach Bacteria Monitoring

Studies Show Water Quality Impacts of Homeless Waste Disposal at Green Lake

Statistical analysis of weekly fecal bacteria data shows a significant increase in levels at West Beach but not East Beach in the past 2 years. This finding suggests that the increase may have been due to human waste disposal in the lake since West Beach is down current of homeless encampments and RVs, while East Beach is not near encampments and was closed to swimming and more populated by geese in this period. Human waste pathogens and floating hypodermic needles pose a risk to swimmers on the west shore of the lake.

See a presentation of the analysis from FOGL’s July meeting here. Or read the presentation in this post below:


Green Lake Stewards Work Party - December 11, 2021

Green Lake Work Party Saturday morning – December 11, 2021, 9AM to 11AM

Hello Stewards…

Happy December! Hope this email finds you well. Sorry for the late notice!

We are having a work party this coming Saturday, December 11th, from 9 am to 11am.

  • Masks – We are no longer requiring volunteers wear masks for the entirety of all events. Mask protocol depends on if there are children under 12 present at your event. This protocol was developed from the City of Seattle Face Covering Policy, attached to this email.
    • Masks for events without children under 12 – Volunteers should arrive wearing a mask, and keep it on when gathering (introduction, assisting with planting, moving mulch together, etc.), but may take them off when working spread out more than 6 feet.
    • Masks for events with children under 12 – All volunteers should wear a mask for the duration of the event.
  • Bring your own work gloves.
  • Tools will be disinfected after use.
  • We will work separated with social distancing in mind.
  • RSVP at, if you are interested.

If you arrive late, follow the Event signs to find the work site:

Date: Dec. 11, 2021
Time: 9 am to 11 am
Meet: Beside the Aqua Theater at the east end of the Small Craft Center (5900 West Green Lake Way North)

Dress for the weather and the dirty work, wear close-toed shoes and bring a bottle of water. Hope see you there!

Dan Kujawinski (773) 629.2516 or

Our mailing address is:

Green Lake Water Quality - January 23, 2022

Secchi Depth: 2.5 meters, (8.2 feet)
Water Temp:   5.5 C, (41.9 F)

Lake Water Quality is monitored weekly by Jeffrey Howard at East Green Lake from the T-dock near the Green Lake Community Center or from a boat at the deepest part of the lake. The weekly data are reported quarterly and uploaded to the King County Lakes website available here. Select “Green-1” and “View Data”. General lake information, water quality data, and reports are available here.

For continuous Green Lake Water Level and Temperature Gauge data tracked by King County, go to the King County Hydrologic Information Center website where you can search for both temperature (in C) and lake elevation. Here are instructions:
1. Click on either Water Temperature or State Only Gage to get a map of monitoring sites.
2. Click on the red dot at Green Lake
3. Click on View Graph. (The graph is currently being updated to improve visibility.) More data selections are listed left of the graph.

Projects! Projects!

by Rob Zisette

Taiga rowing

Project funding provided in part by donations in memory of Taiga Hinkley.

Friends of Green Lake is currently working on projects to benefit Green Lake and its users. Come to our meeting or click on the following projects to learn more about them.
heron on artificial wetlandFloating Wetlands
Install two floating wetlands in shallow areas of the lake to provide native waterfowl habitat on the surface and fish habitat underneath, and to improve water quality by their nutrient uptake. Three alternative sites have been proposed with the preliminary design of each wetland to be approximately 66 feet long by 8 feet wide. Click here to read more.

G L zero zero

Concept for a flat marker, starting with GL followed by a 2 digit number.

Path Emergency Markers
Install small markers every 150 feet along the Green Lake footpath with unique numbers whose locations are registered with Seattle Emergency Services. The markers would greatly shorten 911 call response time from current locating problems associated with the lack of visible street signs or landmarks. Click here to read the emergency marker project document.

Friends of Green Lake VIRTUAL Meeting - January 25, 2022


Please join our 7 pm ZOOM MEETING on January 25 to provide input on our installation and maintenance plan for our FLOATING WETLAND PROJECT, funded in part by the Seattle Neighborhood Matching Fund


  • Beach Cleanup by Carter Yagle
  • Floating Wetland Design and Procurement Update
  • Floating Wetland Installation Plan
  • Floating Wetland Maintenance Plan
  • Integrated Aquatic Vegetation Management Plan
  • Treasurer’s Report
  • Additional Items of Interest

Reminder – this meeting will be
VIRTUAL – online via Zoom

Here are your Zoom Instructions:

Topic: Friends of Green Lake

Time: Jan 25, 2022 07:00 PM Pacific Time (US and Canada)

Join Zoom Meeting
Meeting ID: 854 4518 3090

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Meeting Minutes Are Now Online

Minutes for previous meetings are being posted in the blog, retroactively. Click here for a minutes-only archive.