Fauna that have been observed in the stream's vicinity include northern water shrews and trout.

Somer Brook begins in a wetland at the top of South Mountain in Noxen Township.

[1] Somer Brook joins Mehoopany Creek 13.04 miles (20.99 km) upstream of its mouth.

The total dissolved solids concentration was 20 parts per million at each of the three sites while, the concentration of dissolved oxygen ranged from 6.2 to 6.4 milligrams per liter (0.0062 to 0.0064 oz/cu ft), with an average of 6.3 milligrams per liter (0.0063 oz/cu ft).

[5] This variant name appears on some United States Geological Survey topographic maps.

[8] Somer Brook is described as "scenic" in Jeff Mitchell's book Hiking the Endless Mountains.

[9] Wild trout naturally reproduce in Somer Brook from its headwaters downstream to its mouth.