What is the current flow on Merrimack River?

Merrimack River was running 4,190 cubic feet per second as of Aug 1, 2026, 6:30 PM UTC, measured at USGS gauge 01100000. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

Merrimack River

Massachusetts. Streamflow and water-temperature readings from USGS gauges. Running 4,190 cfs as of Aug 1, 2026, 6:30 PM UTC.

Latest Reading

4,190

cubic feet / second

USGS gauge

Flow measured Aug 1, 2026, 6:30 PM UTC at gauge 01100000. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on Merrimack River

Gauge	Station	Water temp?
01100000	MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA	—

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Conditions: USGS NWIS (public domain).