How many lakes and reservoirs in Massachusetts are tracked here?

14, of which 10 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.

Which Massachusetts lakes report a %-full figure?

None of Massachusetts's lakes in this dataset currently have a source-provided %-full figure — we show the bare level rather than estimate one.

Where does the data come from?

USGS Water Services and USACE CWMS Data, both public domain. See the methodology page for the exact endpoints and update cadence.

Massachusetts lake & reservoir water levels

14 lakes tracked · 10 with a current elevation reading · USGS Water Services + USACE CWMS Data

Massachusetts has 14 lakes and reservoirs tracked here — 10 with a current elevation reading, from USGS Water Services and USACE CWMS Data. Sort the table by level, storage, %-full, or trend, then open any lake for its full elevation-with-datum, trend sparkline, storage, and source-and-vintage stamp. Figures are provisional readings for reference — not for navigation or safety decisions.

Statewide totals Massachusetts · USGS + USACE

Lakes tracked: 14
With elevation reading: 10
With %-full figure: 0

All Massachusetts lakes

Every lake tracked in Massachusetts. Click a column heading to sort, or filter by name. Elevation lakes are listed before storage-only lakes; a missing figure always shows "not reported," never an estimate.

Filter lakes

Massachusetts lakes, elevation lakes first, by name.
		Datum			Trend
Ashumet Pond, Falmouth	43.76	NGVD29	—	—	→Steady
Barre Falls Dam	771.26	NGVD29	27	—	→Steady
Birch Hill Dam	816.19	NGVD29	119	—	→Steady
Buffumville Dam	492.67	NGVD29	35	—	↑Rising
Conant Brook Dam	693.76	NGVD29	2	—	↑Rising
East Brimfield Dam	632.22	NGVD29	84	—	↑Rising
Hodges Village Dam	467.96	NGVD29	11	—	↑Rising
Long Pond	52.72	NAVD88	—	—	→Steady
Pumphouse on Assawompset Pond	51.74	NAVD88	—	—	↓Falling
Westville Dam	525.83	NGVD29	21	—	↑Rising
Knightville Dam	—	—	13	—	—
Littleville Dam	—	—	202	—	—
Tully Dam	—	—	1,066	—	—
West Hill Dam	—	—	34	—	—

Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-07-14. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).

Frequently asked questions

How many lakes and reservoirs in Massachusetts are tracked here?: 14, of which 10 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.
Which Massachusetts lakes report a %-full figure?: None of Massachusetts's lakes in this dataset currently have a source-provided %-full figure — we show the bare level rather than estimate one.
Where does the data come from?: USGS Water Services and USACE CWMS Data, both public domain. See the methodology page for the exact endpoints and update cadence.

Explore

Read the methodology behind these figures, or search all lakes nationally from the home page.