Nonnewaug Falls is a waterfall on Watertown Branch in Naugatuck Valley Planning Region, Connecticut, in the Northeastern Coastal Zone region, with a total height of about 100 feet. It lies about 2.5 miles west of Watertown and roughly 6.9 miles northwest of Waterbury as the crow flies.
At 100 feet it is among the ten tallest of the 53 Connecticut waterfalls with a recorded height, ranking 2nd. The tallest single drop is 20 feet. The water comes down as a tiered waterfall, falling in several distinct steps one after another.
The Northeastern Coastal Zone is a rolling, glaciated lowland of oak-pine forest, stony soils and dense settlement from Boston to Long Island Sound. Waterfalls are small, often on former mill streams over granite ledges.
There are 10 recorded waterfalls in Naugatuck Valley Planning Region. East Meadow Brook Falls, is about 3 miles away. Hancock Brook Cascades, a 25-foot cascade waterfall, is about 6.2 miles away. Caroline Glen Cascade, is about 7.8 miles away.
Nonnewaug Falls is located at 41.6085° N, 73.1667° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this waterfall yet.