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Weber River treatment plant shut down after unusually high organic loads; partners plan sampling and outreach
Summary
A local water utility said warm rains and apparent sediment and organic loads forced a Weber River treatment plant to temporarily suspend treatment. Participants agreed to expand sampling and pursue outreach to landowners whose livestock and bank disturbance may be contributing pollution.
A local water utility operator told the Weaver River Partnership that its treatment plant was temporarily shut down after staff detected unusually high organic loads in water drawn from the Weber River and related tributaries.
"We actually had to start our treatment plant down here a few days ago last Friday because I could not treat the water coming down the Weber River. It was so bad," the operator said during the meeting, adding that measured total organic carbon (TOC) coming into the plant rose to about 7.5 (from an expected ~4) and the raw water appeared "chocolate milk" in color.
Why it matters: Participants said the condition forced the utility to rely on well water and to flush storage tanks; heavy chlorination to control organics caused noticeable chlorine odor in the distribution system. The utility said it had flushed several million gallons of water and was increasing well pumping to maintain customer supply while sampling and investigations continued.
Meeting discussion identified several possible contributors: small tributary inputs after warm rains and frozen ground conditions, livestock trampling near riverbanks that increases sediment loads, and organic material in fields and floodplain areas. The utility said Echo Creek contributions alone (estimated at 5–10 cubic feet per second) were too small to explain the river-wide effect and that other farm-field and runoff sources likely are significant.
Council members and partners agreed to expand sampling and monitoring to identify hotspots. The utility reported tests taken throughout the watershed on the preceding Friday and said results were pending; additional sampling of upper-watershed sites was underway. Participants suggested targeted outreach to landowners with livestock bank access, and noted work already under way to repair fences and reduce bank trampling.
Participants also discussed restoration measures developed by partners — for example low-tech, wood-based stream structures and beaver-focused restoration — as part of long-term efforts to reduce sediment and improve riparian health, but emphasized immediate sampling and targeted landowner outreach as the near-term priorities.
The meeting did not record a formal vote; the utility said it will share test results when available and partners offered to coordinate field visits to inspect potential source areas.
