USGS stream gauge 01100500 · Massachusetts

Merrimack River at Lawrence, MA

As of Oct 28, 2026, 4:30 AM EDT, this gauge read a gage height of 9.04 ft. Over the past 7 days the water level fell 0.89 ft. Data from the USGS.

Updated Oct 28, 2026, 5:26 AM EDT (USGS Water Data snapshot)

Gage height

9.04 ft

7-day range 8.68–10.20 ft

Discharge

—

Latest reading

57 min ago

Oct 28, 2026, 4:30 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 8.68 · High 10.20.

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

Reading this gauge

Gage height is the water surface level above this station's own reference point, so 9.04 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	01100500
Official name	MERRIMACK RIVER AT LAWRENCE, MA
State	Massachusetts
Drainage area	4,672 sq mi
Coordinates	42.7048° N, 71.1531° W

Source: USGS Water Data for the Nation, site 01100500. Parameters 00065 (gage height) and 00060 (discharge).

USGS station page View on OpenStreetMap Massachusetts earthquakes

Other Massachusetts gauges

Connecticut River at I-391 Bridge at Holyoke, MA· 3,010 cfs
Connecticut River at Montague City, MA· 2,170 cfs

← All river gauges