Yesterday Seattle Public Utilities announced that a four-block stretch of Lake Washington remains closed to contact by humans and pets due to a sewage spill earlier this week.
The closed area extends from South Angeline Street north to the 4200 block of Lake Washington Boulevard South (including Lakewood Moorage).
Earlier this week Seattle Parks and Recreation (Parks), Seattle Public Utilities (SPU) and Public Health–Seattle and King County closed areas of the lake Wednesday after problems with a pipe valve caused an estimated 12,000 gallons sewage to spill near South Alaska Street and Lake Washington Boulevard South, more than a mile north of the Seward Park beach.
Wednesday and Thursday, SPU sampled eight locations along Lake Washington Boulevard for fecal coliform bacteria, an indicator of sewage. All locations but one, including the Seward Park swimming beach, showed extremely low concentrations of fecal bacteria.
Water tests over the past two days near the spill site showed an elevated level of bacteria. The area closed to people and pets will be tested again over the weekend.