### Meeting Overview The Lake Whatcom Water and Sewer District, City of Bellingham, and Whatcom County held their annual joint meeting on April 2, 2025, to review the 2020-2024 Lake Whatcom Management Program accomplishments and present the new 2025-2029 work plan. The meeting featured water quality monitoring reports from Western Washington University and highlighted collaborative efforts to protect Lake Whatcom as the region's drinking water source. ### Key Terms and Concepts **Total Maximum Daily Load (TMDL):** A federal Clean Water Act requirement that sets limits on the amount of phosphorus that can be discharged into Lake Whatcom to protect water quality. **Effective Developed Acres Reduced:** A TMDL measurement unit representing developed land where stormwater treatment has reduced phosphorus runoff to forest-level amounts. **Eutrophication:** The process where excess phosphorus promotes algae growth, which then decomposes and consumes oxygen, creating harmful conditions for aquatic life. **Internal Loading:** When phosphorus stored in lake sediments releases back into the water column during low-oxygen conditions, continuing the cycle of nutrient pollution. **Stratification:** Summer lake conditions where warm water floats on top of cold water, preventing mixing and creating oxygen-depleted bottom layers. **POST System:** Phosphorus Optimized Stormwater Treatment - an open-source, cost-effective stormwater treatment system developed by the City of Bellingham. **Lake Whatcom Management Program:** A collaborative effort between three jurisdictions established in 1998 to protect and improve lake water quality through coordinated five-year work plans. **Home Ignition Zone:** A 150-foot buffer around structures where vegetation and fuels are managed to reduce wildfire risk. ### Key People at This Meeting | Name | Role / Affiliation | |---|---| | Todd Citron | President, Lake Whatcom Water and Sewer District | | Kim Lund | Mayor, City of Bellingham | | Paul Sidhu | Whatcom County Executive | | Dr. Angela Strecker | Director, Western Washington University Institute for Watershed Studies | | Justin Clary | Lake Whatcom Water and Sewer District | | Gary Stoyker | Whatcom County Public Works | | Jason Porter | City of Bellingham Surface and Stormwater Manager | | Hannah Stone | Bellingham City Council Member | | Michael Lilliquist | Bellingham City Council Member | | Barry Buchanan | Whatcom County Council Member | ### Background Context Lake Whatcom serves as the sole drinking water source for over 120,000 people in Whatcom County. The lake has experienced declining water quality since the 1960s due to residential development and loss of old-growth forests that once acted as natural filters. In 2016, federal regulations required local governments to develop a cleanup plan focusing primarily on reducing phosphorus pollution that causes harmful algae growth and oxygen depletion. The three jurisdictions have spent over $50 million in recent years on lake protection efforts, including land acquisition, stormwater treatment facilities, and forest management. Climate change adds urgency to these efforts, as warmer temperatures and changing precipitation patterns could worsen water quality conditions. The collaborative management approach is considered exceptional nationally for its integration across different program areas and sustained cooperation between jurisdictions over more than 25 years. ### What Happened — The Short Version Western Washington University reported mixed water quality trends: surface phosphorus levels have stabilized after earlier increases, but dissolved oxygen continues declining and internal phosphorus loading remains problematic. The university emphasized that while catastrophic conditions aren't imminent, lake recovery is slow and requires sustained effort. Staff presented accomplishments from the 2020-2024 work plan, including completion of major stormwater projects, purchase of 607 acres for forest protection, and development of innovative treatment technologies. The city is approaching its phosphorus reduction targets, while the county has achieved about 25% of its goals. Public commenters highlighted concerns about development patterns, with 80% of new housing occurring in Sudden Valley, and called for stronger county-level protections and more consistent regulations between jurisdictions. Several speakers emphasized the need for better coordination on comprehensive planning and water system planning. Council members expressed frustration with the meeting format, requesting more time for policy discussions and more frequent coordination beyond the annual meeting. Cost concerns were raised about the financial burden on residents as treatment requirements intensify. ### What to Watch Next - Department of Ecology review of updated phosphorus models, potentially leading to TMDL reassessment in about one year - Implementation of new climate vulnerability assessment and rapid response plan for invasive species - Progress on joint forest management plan between city and county - Results from enhanced stormwater facility monitoring to refine phosphorus reduction estimates ---