Damage to creeks, water supply analyzed after Sonoma County fires

Mary Callahan, THE PRESS DEMOCRAT

It’s called “first flush,” the rain that fell last week upon the scars of recent wildfires and threatened to wash into local streams whatever ash, debris or contaminants had been left upon the landscape.

From fire retardant to heavy metals to organic byproducts and exposed sediment, anything left behind by the flames was at risk of being swept into storm drains and streams during the season’s first substantial rains, experts said.

Public agencies are hopeful that a feverish effort to deploy thousands of straw wattles and other barriers around burned structures, charred hillsides and storm drain inlets prevented some pollution from occurring with storm runoff.

But strategic stream testing will help measure their success as water quality engineers and experts gear up for what will be a long-term campaign to protect water resources and restore scorched watersheds into the rainy season and beyond.

“Healthy watersheds mean a healthy environment, and right now we have a very unhealthy watershed,” said Sonoma Clean Power Director of Programs Cordel Stillman, who is helping to coordinate county and municipal watershed recovery projects in the wake of the wildfire disaster.

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