Summary: Tariff revisions to pass through the King County Hazardous Waste Tax. On January 1, 2020, the King County Board of Health is increasing the Local Hazardous Waste Management Plan fee by 5.5 percent, or $0.05 per month for single family customers. North Sound/Marysville business unit serves approximately 21,000 garbage and recycling customers in King County and approximately 99,700 garbage and recycling customers in Snohomish County. The company’s last general rate case became effective September 1, 2015.