USGS stream gauge 01096508 · New Hampshire

Merrimack River at Nashua, NH

As of Oct 28, 2026, 6:15 AM EDT, this gauge read a gage height of 4.61 ft. Over the past 7 days the water level fell 0.04 ft. Data from the USGS.

Updated Oct 28, 2026, 7:25 AM EDT (USGS Water Data snapshot)

Gage height

4.61 ft

7-day range 4.52–4.76 ft

Discharge

—

Latest reading

1 hr ago

Oct 28, 2026, 6:15 AM EDT

Readings are provisional USGS data and may be revised. Rivers can rise fast after rain upstream. For flood warnings, check weather.gov and follow local authorities.

Gage height, past 7 days

Gage height (ft), hourly, past 7 days. Low 4.52 · High 4.76.

Chart dates are in New Hampshire local time (America/New York).

Reading this gauge

Gage height is the water surface level above this station's own reference point, so 4.61 ft is not the river depth and cannot be compared with other gauges. Discharge, the volume of water flowing past each second, is the better number for comparing conditions over time and between rivers.

Station details
USGS site number	01096508
Official name	MERRIMACK RIVER AT NASHUA, NH
State	New Hampshire
Drainage area	3,480 sq mi
Coordinates	42.7634° N, 71.4428° W

Source: USGS Water Data for the Nation, site 01096508. Parameters 00065 (gage height) and 00060 (discharge).

USGS station page View on OpenStreetMap New Hampshire earthquakes

Other New Hampshire gauges

Connecticut River at North Walpole, NH· 1,960 cfs
Merrimack River near Goffs Falls, below Manchester, NH· 1,420 cfs

← All river gauges