Sewage Spill Contaminates Arkansas River in Pueblo
What happened
Sewage entered the Arkansas River after a 48-inch wastewater pipe burst while repairs were being conducted on a 60-inch pipe in Pueblo. The spill began undetected on August 26, and officials discovered the issue on September 9, 2026, when 3 million gallons were missing from the treatment system.
From gazette.com
Why it matters
Stakeholders are currently examining the remaining effects of the contamination and how similar events can be prevented. The incident highlights a failure in the combined wastewater and stormwater pipe system, which discharges into the river.
A utility is directing water flow into the Arkansas River from Pueblo.
From gazette.com
Who's involved
- Colorado Department of Public Health and EnvironmentMonitors the river's water quality and receives notifications regarding environmental incidents in Pueblo
- PuebloThe city where the combined wastewater and stormwater pipe system failed
- Arkansas RiverThe major tributary of the Mississippi River that received the sewage contamination
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The entities involved
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Colorado Department of Public Health and Environment
department of the Colorado state government
- Colorado State University and the Colorado Department of Public Health and Environment are conducting joint research on water quality standards in a basin.
- Major fires are currently affecting the state of Colorado, with a center based at Colorado State University discussing the associated health risks.
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Pueblo
city in and county seat of Pueblo County, Colorado, United States
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Arkansas River
major tributary of the Mississippi River, United States