Squantz Pond
- Ecological and recreational information from the Connecticut Department of Environmental Protection.
- http://www.ct.gov/dep/cwp/view.asp?A=2716&Q=325268

Beach Watch
- Monitoring information on the quality of water or closings for regional beaches.
- http://oaspub.epa.gov/beacon/beacon_county_page.main?p_state_fips=09&p_county_fips=001

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.
- http://www.nae.usace.army.mil/environm/damos/wlismap_2.htm

Hop Brook Lake and Dam
- River basin data and information on recreational activities. From the US Army Corps of Engineers.
- http://www.nae.usace.army.mil/recreati/hbl/hblhome.htm

Norwalk River Watershed Association
- Overview of the area, plus reports, events and related links.
- http://www.norwalkriver.org/