- Associated Press - Wednesday, March 4, 2015

PORTLAND, Ore. (AP) - Oregon state regulators have fined the city of Portland $25,000 for illegally dumping chlorinated wastewater into the Columbia Slough last October.

The state’s Department of Environmental Quality says the fine is related to a 300,000-gallon discharge of chlorinated wastewater into the slow-moving slough, adjacent to the Columbia Wastewater Treatment Plant in north Portland.

Portland’s permit allows for dumping treated wastewater into the Columbia River.

The Oregonian reports (https://bit.ly/1Eekn2i ) that city Bureau of Environmental Services spokesman Linc Mann says the chlorination discharge occurred because of a faulty valve at the plant.

Mann says chlorinated wastewater typically travels from the plant north through a 2 ½-mile pipeline into the Columbia River, where the chlorine is treated before the wastewater enters the waterway.

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Information from: The Oregonian, https://www.oregonlive.com

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