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KUOW's environment beat brings you stories on the ongoing cleanup of the Hanford Nuclear Reservation, alternative energy, the health of the Puget Sound, coal transportation and more. We're also partnered with several stations across the Northwest to bring you environmental news via EarthFix.

Seattle: You're composting wrong, so bag laws may change again

SPU reports that residents are confusing bags made out of recycled materials with bags that can be used for composting.
Courtesy of Seattle Public Utilities
SPU reports that residents are confusing bags made out of recycled materials with bags that can be used for composting.

Seattleites, you have been composting wrong.

Seattle Public Utilities says people often put produce bags in the compost bin, but not all of those bags are biodegradable. That messes up the city's composting machines, which are costly to fix. 

Sego Jackson at Seattle Public Utilities explains the issue is consumer knowledge.

Jackson: "People are confused about what's compostable and what is not. They are given bags that are tinted green, they used the words eco and bio, they have leaves and trees and symbols on them, and many of the public thinks that this means all bags are compostable, but they are not."

So the City Council plans to establish a color system for produce bags, under a proposed ordinance. Green or brown would be for compostable bags offered at grocery stores. No other takeout bags would be allowed those colors.

Seattle has encouraged people touse the compostable bags for indoor bins and is hoping to clear up confusion with the new ordinance.

The proposed measure would also make the five cent fee for paper bags permanent. That fee was supposed to expire at the end of the year.

The measure is an extension of the city's plastic bag ban.

A council committee passed the measure Friday, and the full council will vote next month.