Beach Watch: Monitoring information on the quality of water or closings for regional beaches.
Disposal Area Monitoring System: Western Long Island Sound: Map of offshore dredged material disposal sites managed and monitored by the New England District of the Army Corps of Engineers.
Hop Brook Lake and Dam: River basin data and information on recreational activities. From the US Army Corps of Engineers.
Norwalk River Watershed Association: Overview of the area, plus reports, events and related links.
Squantz Pond: Ecological and recreational information from the Connecticut Department of Environmental Protection.