BirdTrout

Susquehanna River, New York

15.2 mapped river miles, draining 352 square miles, in the Upper Susquehanna basin watershed. No gauge stands in it; the nearest is 38.9 miles away, and what this page knows about its temperature is NYSDEC's classification of the water itself.

Open in BirdTrout →

Public land — where the bank is open to walk and fish

USGS gauge — live water temperature

Water temperature — the colour of the river, and of every dot on it

58 64 70

50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.

The nearest live reading

There is no USGS gauge on the Susquehanna River. This is the nearest one — 38.9 miles away, at Delaware River — and it is not a reading of this water. It is here because it says what the region's streams are doing today, which is the question the classification below cannot answer. The reading is live; if that fetch cannot happen it falls back to the last value we cached, 28 August 2026, 15:46 UTC.

Thermal classification

NYSDEC's classification of this water, reach by reach. It is the same classification the map paints from, and it is a class, not a temperature: no July mean appears on this page because none was measured on this water.

NYSDEC has classified 6.2 of the 112 miles NHD carries for this stream — 6% of it. Every typed reach carries the same class, cold. The untyped reaches are not warm water — they are water NYSDEC's inventory does not reach, and the mile ranges above span only the reaches it does.

NYSDEC classification

NYSDEC classifies this water as Class A — drinking water source and Class B — swimming and contact recreation. More than one class appears because the classification changes along the river; the thermal bar above shows where. On those reaches DEC also designates it trout spawning waters — which is the half of the classification that is about temperature, and the half this map paints by. The class is a designation of best usage under 6 NYCRR — what the water is protected for — and not the season and creel rules, which change yearly and live with the agency.

NYSDEC water quality classifications and standards →

Public land on the river

5 units of public or open-access land touch this river, 567 acres in total. Acreage is the whole unit, not the part beside the water.

Tributaries and watershed

3 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.

• Charlotte Creek 33.9 mi · RM 0.0
• Schenevus Creek 29.8 mi · RM 3.5
• Gifford Creek 4.9 mi · RM 0.7

Susquehanna River sits in HUC 8 02050101, the Upper Susquehanna basin, and drains 352 square miles, Strahler order 6 at the mouth. 246 NHD reaches carry the name for 111.7 miles in total — more than the 15.2 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.