Total streamflow across the Androscoggin River was last observed at 29,730 cfs, and is expected to yield approximately 58,969 acre-ft of water today; about 85% of normal. Average streamflow for this time of year is 34,782 cfs, with recent peaks last observed on 2023-12-20 when daily discharge volume was observed at 146,900 cfs.

Maximum discharge along the river is currently at the Androscoggin River Near Auburn reporting a streamflow rate of 11,300 cfs. However, the streamgauge with the highest stage along the river is the Androscoggin River At Rumford with a gauge stage of 6.8 ft. This river is monitored from 4 different streamgauging stations along the Androscoggin River, the highest being situated at an altitude of 1,249 ft, the Androscoggin River At Errol.

The Androscoggin River runs through New Hampshire and Maine, covering a length of 178 miles. It was once one of the most polluted rivers in the country due to the paper mills that lined its banks, but since the 1970s, extensive cleanup efforts have improved the water quality. The river's hydrology is influenced by several dams, including the Livermore Falls Dam, the Gulf Island Dam, and the Berlin Dam, which provide hydropower and flood control. The river also has several reservoirs, including the Umbagog Lake, the Richardson Lake, and the Aziscohos Lake. Recreational activities such as fishing, hiking, and camping are popular along the river, and the river also supports agricultural activities like irrigation and farming.