Precision Castparts Faces Violation Over Creek Chemical Spill
The DEQ issued a notice after 394 gallons of chemicals killed fish along a 2-mile stretch of Johnson Creek this September.
Updated on Oct. 23, 2026 in Chemistry
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Neighbors who use the Springwater Corridor bike trail encountered dead fish in Johnson Creek after Precision Castparts released chemicals into the water between September 17 and September 19, 2026. The Oregon Department of Environmental Quality has since issued a notice of violation to the company regarding the discharge.
Why it matters
The incident highlights ongoing environmental concerns for residents living near Johnson Creek, a vital waterway that cuts through several Portland neighborhoods. Whether further regulatory oversight will prevent future industrial spills remains an open question for the community.
A 2-mile stretch of Johnson Creek was impacted by 394 gallons of chemical discharge, including sodium hydroxide and sodium hydrosulfide. While officials have documented the spill's volume, the total financial impact of future penalties is not yet finalized.
The players
Precision Castparts
An industrial manufacturer operating in the Portland area.
Oregon Department of Environmental Quality
The state agency responsible for managing environmental regulations and quality standards.
The details
Precision Castparts reported the spill to the Oregon Department of Environmental Quality on September 28, following an initial investigation into reports of foamy discharge and fish deaths on September 18. The spill included sodium hydroxide, sodium hydrosulfide, and sodium chlorite, resulting in fish mortality along a 2-mile segment of the creek. The state agency formally notified the company of environmental violations on October 23.
Timeline
September 17-19, 2026: Chemicals were released into Johnson Creek.
September 18, 2026: DEQ began investigating reports of dead fish.
September 28, 2026: Precision Castparts reported the discharge to the state.
October 23, 2026: DEQ issued a formal violation notice to the company.
Beyond the Bridges
This incident follows established Oregon water quality standards for industrial discharge that prohibit such releases. The state’s intervention marks a formal enforcement action following an unauthorized departure from those protective requirements.
Residents and cyclists using the Springwater Corridor bike trail may notice ongoing ecological recovery efforts near the creek. Property owners and park users should keep an eye on official water quality updates from the city as the cleanup process concludes.
The takeaway
Portlanders living near Johnson Creek should observe how the company addresses state remediation requirements. Watch for future DEQ announcements regarding potential penalties to track the company's accountability for the event.
Further reading
For more on how the city monitors local waterways, visit Chemistry.
Source note: This article includes information reported by Opb.
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