Sewer lakeline blockage affecting some Mercer Island properties

North Mercer Island residents urged to stop flushing due to sewer blockage

The City of Mercer Island is urging residents on the north end to limit their water use. URGENT: Sewer blockage remains. STOP all wastewater discharge in affected area (see map). Crews making progress but blockage unlikely to be cleared today. Avoid Lake Washington water (see satellite map). For more information and latest updates, visit: https://t.co/RKNGXlRm4X pic.twitter.com/PRYKMfdLZL — City of Mercer Island (@mercergov) February 24, 2026 O…

Sewer lakeline blockage affecting some Mercer Island properties

This morning, the city of Mercer Island informed residents that a sewer lakeline blockage has occurred and is affecting north Mercer Island properties from Luther Burbank Park to 97th Avenue Northeast.