Dashboard of Key Findings

C. Combined Sewer Overflows

Polluted discharges from CSOs dropped 80% over two decades.

J. Eelgrass

Eelgrass increased from 2013 to 2018 but remains below historical abundance.

E. Climate Change

Air temperature increased and coastal flooding became more frequent during the past century.

H. Nutrients

Total nitrogen declined at three of five sites with long-term data…
…signaling improvements in water quality.

G. Bay Water Quality

Water temperatures increased more than 1.6°C (about 3°F) since 1993, and water clarity (Secchi depth) dropped slightly.

I. Aquatic Connectivity

Sea-run fish are regaining access to the Presumpscot River watershed…
…but relic dams block fish from swimming up the Royal River, Stroudwater River, and some coastal streams.

N. Conserved Lands

14.2% of the Casco Bay watershed is permanently conserved.