How many lakes and reservoirs in New Jersey are tracked here?

8, of which 8 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.

Which New Jersey lakes report a %-full figure?

None of New Jersey'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.

New Jersey lake & reservoir water levels

8 lakes tracked · 8 with a current elevation reading · USGS Water Services + USACE CWMS Data

New Jersey has 8 lakes and reservoirs tracked here — 8 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 New Jersey · USGS + USACE

Lakes tracked: 8
With elevation reading: 8
With %-full figure: 0

All New Jersey lakes

Every lake tracked in New Jersey. 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

New Jersey lakes, elevation lakes first, by name.
		Datum			Trend
Boonton Reservoir at Boonton	304.61	NGVD29	—	—	↑Rising
Greenwood Lake at Awosting	618.53	NAVD88	—	—	↑Rising
Lake Tappan at Old Tappan	54.97	NGVD29	—	—	↑Rising
Oradell Reservoir at Oradell	15.47	NGVD29	—	—	↓Falling
Spruce Run Reservoir at Clinton	260.12	NGVD29	—	—	↓Falling
Swimming River Reservoir	32.87	NGVD29	—	—	↓Falling
Wanaque Reservoir at Wanaque	294.66	NGVD29	—	—	↓Falling
Woodcliff Lake at Hillsdale	93.19	NGVD29	—	—	↑Rising

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 New Jersey are tracked here?: 8, of which 8 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.
Which New Jersey lakes report a %-full figure?: None of New Jersey'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.