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Staff reports widespread E. coli elevations in Clear Creek watershed; microbial source tracking and infrastructure checks recommended
Summary
CBU staff presented results from a Clear Creek–Jackson Creek E. coli sampling project: 211 samples from 32 sites showed nearly 80% above the geometric-mean standard and 14% at test maximums. Staff recommended further microbial source tracking, targeted infrastructure inspection, and outreach.
Evelyn Porter, a Clear Creek sampling fellow with the utilities’ environmental division, presented preliminary results from an October 2024–2026 sampling project of the Clear Creek–Jackson Creek watershed.
Porter said the project collected 211 samples across 32 sites, including nine rotating weekly sites, and found elevated E. coli concentrations across much of the watershed: roughly 79% of samples exceeded the 125 CFU/100mL geometric-mean standard and 63% exceeded the 235 CFU/100mL single-sample action level. About 14% of samples reached the undiluted test sensitivity maximum used by the lab. Porter said intra- and…
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