A sharp flow drop on the North Branch coincides with a plant in violation

August 6, 2026

Streamflow on the North Branch Clinton River near Mt. Clemens has dropped sharply this week: 18.1 cubic feet per second on August 6, against a 30-day average of nearly 31, with gage height down almost a foot from its recent norm. This isn't a drought story. Oakland County has held at zero percent drought coverage across every category for the past twelve weeks, so something other than regional weather is pulling this reach down.

The timing is what makes this worth watching closely. The Townsend Village wastewater treatment plant, which discharges into this same stretch, is currently on the EPA's significant non-compliance list, one of only two facilities out of more than 500 permitted dischargers scanned across the entire Clinton River watershed to carry that designation. Lower flow means less river volume available to dilute whatever the plant is releasing. A permit violation during normal or high flow is a concern; the same violation during a flow drop like this concentrates effluent into a smaller volume of water, precisely when the receiving stream is least able to absorb it.

This stretch sits within a watershed already carrying a real impairment burden, with roughly a third of nearby assessed waterbodies listed as impaired under the Clean Water Act. There's little slack left to work with. The Clinton River Watershed Council monitors this exact reach and is worth following for anyone tracking how this resolves.

Data from EPA ATTAINS (303(d) impaired waters), EPA ECHO, USGS, U.S. Drought Monitor (NIDIS / drought.gov) and Speak for the Trees org directory

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