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Connecticut State Report
Other states that contain this watershed:
Massachusetts, Lower Connecticut Watershed

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Water Quality Data Available for this Watershed

Connecticut, Lower Connecticut Watershed


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Listed Waters for Reporting Year 2004
Connecticut, Lower Connecticut Watershed

Description of this table
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Angus Park Pond (Glastonbury) CT4009-00-2-L4_01 Impoundment Of Roaring Brook, East Of Rte 83 Glastonbury. Freshwater Lake 9.35 acres TMDL completed
Angus Park Pond (Glastonbury) CT4009-00-2-L4_01 Impoundment Of Roaring Brook, East Of Rte 83 Glastonbury. Lakes, Reservoirs, and Ponds acres TMDL completed
Batterson Park Pond - Farmington, New Britain CT4401-00-1-L1_01 Southeast Farmington - Northeastern Border Of New Britain. Lakes, Reservoirs, and Ponds 162.7 acres
Belcher Brook_01 CT4601-00_01 From Mouth At Mattabasset River Us To Source At Silver Lake, Berlin. Rivers and Streams 3.6 miles
Black Hall River Estuary-02 CT4021-E_02 From Us Side Of Shore Road Crossing (Aka: Rt 156), Us To Ds Side Of Mile Creek Road, Old Lyme. Estuary .03 square miles TMDL needed
Broad Brook (East Windsor-Ellington)-02 CT4206-00_02 From Broad Brook Mill Pond Inlet, East Windsor, Us To Headwaters, Ellington, Just Us Of Snipsic Forest Road Crossing. Rivers and Streams 8.9 miles TMDL needed
Broad Brook (East Windsor-Ellington)-02 CT4206-00_02 From Broad Brook Mill Pond Inlet, East Windsor, Us To Headwaters, Ellington, Just Us Of Snipsic Forest Road Crossing. River 9.01 miles TMDL needed
Broad Brook(East Windsor)-01 CT4206-00_01 From Mouth At Scantic River, Us To Broad Brook Mill Pond, East Windsor, Just Us Of Main Street (Route 191) Crossing. Rivers and Streams .8 miles TMDL needed
Broad Brook(East Windsor)-01 CT4206-00_01 From Mouth At Scantic River, Us To Broad Brook Mill Pond, East Windsor, Just Us Of Main Street (Route 191) Crossing. River 1.01 miles TMDL needed
Coginchaug River_02 CT4607-00_02 From Rte 72 Us To Just Us Of Veterans Memorial Park. Rivers and Streams .3 miles
Coginchaug River_04 CT4607-00_04 From Starr Mill Pond Us (Past Wadsworth Falls) To Strictland Road, Middlefield. Rivers and Streams 4.2 miles
Coginchaug River_05 CT4607-00_05 From Strictland Road, Middlefield, Us To Meeting House Road, Durham. Rivers and Streams 4.7 miles
Coginchaug River_06 CT4607-00_06 From Meeting House Road, Durham, Us To Headwaters, Near Bluff Head, North Guilford. Rivers and Streams 3.1 miles
Connecticut River Estuary-02 CT4000-E_02 North From Saybrook Point, Just Above South Cove, Old Saybrook (West Bank Only), And Entire Ct River From North Side Of Railroad Crossing (Above Mouth Of Lieutenant River, East Bank) Us To Outlet Of Chapmans Pond, East Haddam. Estuary 9.28 square miles TMDL needed
Connecticut River-01 CT4000-00_01 From Head Of Estuary At Chapman Pond Outlet, East Haddam, Us To Northern Most Boundary Of Hurd State Park, East Hampton. River 10.27 miles TMDL needed
Connecticut River-01 CT4000-00_01 From Head Of Estuary At Chapman Pond Outlet, East Haddam, Us To Northern Most Boundary Of Hurd State Park, East Hampton. Rivers and Streams 9 miles TMDL needed
Connecticut River-02 CT4000-00_02 From Northern Most Boundary Of Hurd State Park, East Hampton, Us To Confluence With Reservoir Brook (Adjacent To Gildersleeve Island), Portland. River 10.49 miles TMDL needed
Connecticut River-02 CT4000-00_02 From Northern Most Boundary Of Hurd State Park, East Hampton, Us To Confluence With Reservoir Brook (Adjacent To Gildersleeve Island), Portland. Rivers and Streams 11.1 miles TMDL needed
Connecticut River-03 CT4000-00_03 From Reservoir Brook Confluence (Adjacent To Gildersleeve Island), Portland, Us To Ma Border. Rivers and Streams 34.5 miles TMDL needed
Connecticut River-03 CT4000-00_03 From Reservoir Brook Confluence (Adjacent To Gildersleeve Island), Portland, Us To Ma Border. River 35.26 miles TMDL needed
Crystal Lake (Middletown) CT4013-05-1-L1_01 South Of Randolph Road, Middletown. Freshwater Lake 30.96 acres TMDL needed
Crystal Lake (Middletown) CT4013-05-1-L1_01 South Of Randolph Road, Middletown. Lakes, Reservoirs, and Ponds acres TMDL needed
Hockanum River-01 CT4500-00_01 From Mouth At Connecticut River, East Hartford, Us To Cellu Company Dam, The First Dam At Scotland Impoundment (Two Dams Just Ds Of This Dam), Includes Impounded Water Behind East Hartford Town Hall. River 4.26 miles TMDL needed
Hockanum River-01 CT4500-00_01 From Mouth At Connecticut River, East Hartford, Us To Cellu Company Dam, The First Dam At Scotland Impoundment (Two Dams Just Ds Of This Dam), Includes Impounded Water Behind East Hartford Town Hall. Rivers and Streams 3.7 miles TMDL needed
Hockanum River-02 CT4500-00_02 From Cellu Company Dam (First Dam At Scotland Impoundment), Us To Confluence With South Fork Hockanum (Aka Hop) River, Just Us Of "Laurel Lake", Manchester. River 3.6 miles TMDL needed
Hockanum River-02 CT4500-00_02 From Cellu Company Dam (First Dam At Scotland Impoundment), Us To Confluence With South Fork Hockanum (Aka Hop) River, Just Us Of "Laurel Lake", Manchester. Rivers and Streams 3.4 miles TMDL needed
Hockanum River-03 CT4500-00_03 From Confluence With South Fork Hockanum (Aka Hop) River (Just Us Of "Laurel Lake"), Us To Union Pond Outlet Dam, Manchester. Rivers and Streams 3.6 miles TMDL needed
Hockanum River-03 CT4500-00_03 From Confluence With South Fork Hockanum (Aka Hop) River (Just Us Of "Laurel Lake"), Us To Union Pond Outlet Dam, Manchester. River 3.42 miles TMDL needed
Hockanum River-05 CT4500-00_05 From Marsh Exit (Approximatly One Mile Ds Of Dart Hill Road Crossing, Parallel To Route 83, Near Neak Road), Vernon, Us To Vernon Potw (Just Ds Of Route 74 Crossing). River 2.48 miles TMDL needed
Hockanum River-05 CT4500-00_05 From Marsh Exit (Approximatly One Mile Ds Of Dart Hill Road Crossing, Parallel To Route 83, Near Neak Road), Vernon, Us To Vernon Potw (Just Ds Of Route 74 Crossing). Rivers and Streams 2.4 miles TMDL needed
Hockanum River-08 CT4500-00_08 From Paper Mill Pond Outlet Dam, Rockville, Us To Shenipsit Lake Outlet Dam. River .59 miles TMDL needed
Hockanum River-08 CT4500-00_08 From Paper Mill Pond Outlet Dam, Rockville, Us To Shenipsit Lake Outlet Dam. Rivers and Streams miles TMDL needed
Hockanum River_04 CT4500-00_04 From Inlet To Union Pond, Manchester Us To One Mile Ds Of Dart Hill Road, Vernon (~ 1.5 Mi Us Of Confl W/ Tankerhoosen). Union Pond Treated As Separate Waterbody. Rivers and Streams 2.5 miles
Hockanum River_06 CT4500-00_06 From Vernon Potw Us To Vernon Ave, Rockville. Rivers and Streams 3.6 miles
Lientenant River Estuary-01 CT4020-E_01 From Mouth At Northern End Of Great Island, On Connecticut River, Us To Rte 156 Crossing, Old Lyme. Estuary .05 square miles TMDL needed
Lientenant River Estuary-02 CT4020-E_02 Lieutenant River, From Rt 156 Crossing North To Saunders Hollow Road And Mill Lane Area (Fall Line) , And Duck River From Railroad Crossing North To Library Lane, Old Lyme. Estuary .09 square miles TMDL needed
Little Brook_01 CT4600-07_01 From Mouth At Mattabasset River Us To Source Near Trinity Rd, Rocky Hill. Rivers and Streams 1.9 miles
Long Hill Brook-01 CT4013-08_01 From Mouth At Sumner Brook, Us To Pameacha Pond Outlet Dam, Just Us Of Pamecha Avenue Crossing, Middletown. Rivers and Streams .4 miles TMDL needed
Long Hill Brook-01 CT4013-08_01 From Mouth At Sumner Brook, Us To Pameacha Pond Outlet Dam, Just Us Of Pamecha Avenue Crossing, Middletown. River .45 miles TMDL needed
Mattabesset River-02 CT4600-00_02 From Route 3 Crossing, Cromwell And Middletown Townline, Us To High Pond Dam (Just Us Of Berlin Street Crossing), East Berlin. River 3.65 miles TMDL needed
Mattabesset River-02 CT4600-00_02 From Route 3 Crossing, Cromwell And Middletown Townline, Us To High Pond Dam (Just Us Of Berlin Street Crossing), East Berlin. Rivers and Streams 3.8 miles TMDL needed
Mattabesset River-03 CT4600-00_03 From High Pond Dam Just Us Of Berlin Street Crossing, East Berlin, Us To Confluence With Willow Brook. River 3.6 miles TMDL needed
Mattabesset River-03 CT4600-00_03 From High Pond Dam Just Us Of Berlin Street Crossing, East Berlin, Us To Confluence With Willow Brook. Rivers and Streams 3.8 miles TMDL needed
Mattabesset River-04 CT4600-00_04 From Confluence With Willow Brook, Us To Kensington Dam At Outlet Of Railroad Pond (Just Us Of Kensington Road Crossing), Berlin. River 2.83 miles TMDL needed
Mattabesset River-04 CT4600-00_04 From Confluence With Willow Brook, Us To Kensington Dam At Outlet Of Railroad Pond (Just Us Of Kensington Road Crossing), Berlin. Rivers and Streams 1.8 miles TMDL needed
Mattabesset River-05 CT4600-00_05 From Kensington Dam At Outlet Of Railroad Pond (Just Us Of Kensington Road Crossing), Berlin, Us To Inlet Of Paper Goods Pond (Segment Includes Both Ponds). Rivers and Streams 1 miles TMDL needed
Mattabesset River-05 CT4600-00_05 From Kensington Dam At Outlet Of Railroad Pond (Just Us Of Kensington Road Crossing), Berlin, Us To Inlet Of Paper Goods Pond (Segment Includes Both Ponds). River 1.01 miles TMDL needed
Mattabesset River-06 CT4600-00_06 From Inlet To Paper Goods Pond, Us To Lower Hart Pond Outlet Dam (Both Lower And Upper Hart Ponds Are Not In Segment). Rivers and Streams 1.3 miles TMDL needed
Mattabesset River-06 CT4600-00_06 From Inlet To Paper Goods Pond, Us To Lower Hart Pond Outlet Dam (Both Lower And Upper Hart Ponds Are Not In Segment). River 1.32 miles TMDL needed
Miner Brook_01 CT4600-26_01 From Mouth At Mattabasset Us To Source Just South Of Westfield St, Middletown. Rivers and Streams 2.9 miles
Muddy Brook (Suffield)-01 CT4101-00_01 From Mouth At Stony Brook, Suffield, Us To Confluence With Philo Brook. River 2.23 miles TMDL needed
Muddy Brook (Suffield)-01 CT4101-00_01 From Mouth At Stony Brook, Suffield, Us To Confluence With Philo Brook. Rivers and Streams 1.8 miles TMDL needed
North Branch Park River-01 CT4404-00_01 From Mouth At Confluence With Park River Just Ds Of I84 Crossing, Us To Entrance Of Conduit (Entire Segment In Pipe) Near Farmingotn Avenue, Hartford. River .51 miles TMDL completed
North Branch Park River-01 CT4404-00_01 From Mouth At Confluence With Park River Just Ds Of I84 Crossing, Us To Entrance Of Conduit (Entire Segment In Pipe) Near Farmingotn Avenue, Hartford. Rivers and Streams .5 miles TMDL completed
North Branch Park River-02 CT4404-00_02 From Ds Side Of Farmington Avenue (At Entrance Of Conduit), Us To Confluence With Wash Brook (Just Ds Of Confluence Of Wash Brook And Beamans Brook), Bloomfield. Rivers and Streams 4.3 miles TMDL needed
North Branch Park River-02 CT4404-00_02 From Ds Side Of Farmington Avenue (At Entrance Of Conduit), Us To Confluence With Wash Brook (Just Ds Of Confluence Of Wash Brook And Beamans Brook), Bloomfield. River 5.39 miles TMDL needed
Park River_01 CT-4400(a) From Mouth At Connecticut River Us To Confluence With North Branch. Rivers and Streams 6 miles
Park River_01 CT-4400(a) From Mouth At Connecticut River Us To Confluence With North Branch. Rivers and Streams 6 miles
Piper Brook-02 CT4402-00_02 From Conduit Entrance (Segment-01) Us Side Of New Britain Avenue, West Hartford, Us Into St. Marys Cemetary (Just Us Of Railroad Crossing And Parallel With Route 9) Where Pipe Emerges From Ground, New Britain. River 5.81 miles TMDL needed
Piper Brook-02 CT4402-00_02 From Conduit Entrance (Segment-01) Us Side Of New Britain Avenue, West Hartford, Us Into St. Marys Cemetary (Just Us Of Railroad Crossing And Parallel With Route 9) Where Pipe Emerges From Ground, New Britain. Rivers and Streams 4.8 miles TMDL needed
Pocotopaug Creek-02 CT4709-04_02 From Old Chestnut Hill Road Crossing, East Hamption, Us To Pocotopaug Lake Outlet Dam (Just Us Of Route 66 Crossing). River 2.66 miles TMDL needed
Pocotopaug Creek-02 CT4709-04_02 From Old Chestnut Hill Road Crossing, East Hamption, Us To Pocotopaug Lake Outlet Dam (Just Us Of Route 66 Crossing). Rivers and Streams 2.1 miles TMDL needed
Quinnipiac River-07 CT5200-00_07 From Hamlin Pond Inlet (Northeast Corner, Just South Of Route 72 And I84 Connection And Railroad), Plainville, Us To Headwaters At Dead Wood Swamp (West Side Of I84, Near Exit 37, Just South Of Route 6), Farmington. Rivers and Streams 3.5 miles TMDL needed
Quinnipiac River-07 CT5200-00_07 From Hamlin Pond Inlet (Northeast Corner, Just South Of Route 72 And I84 Connection And Railroad), Plainville, Us To Headwaters At Dead Wood Swamp (West Side Of I84, Near Exit 37, Just South Of Route 6), Farmington. River 3.5 miles TMDL needed
Sawmill Brook_01 CT4604-00_01 From Mouth At Mattabasset River Us To Source At Atkin Street Pond (Highland Pond) Middletown. Rivers and Streams 3 miles
Scantic River_01 CT-4200 From Mouth Us To Confluence With Broad Brook, East Windsor. Rivers and Streams miles
Scantic River_01 CT-4200 From Mouth Us To Confluence With Broad Brook, East Windsor. Rivers and Streams miles
Silver Lake CT-4601 Southeast Corner Of Berlin, Extending Slightly Into Northeast Meriden. Lakes, Reservoirs, and Ponds acres
Silver Lake CT-4601 Southeast Corner Of Berlin, Extending Slightly Into Northeast Meriden. Lakes, Reservoirs, and Ponds acres
South Branch Park River-01 CT4400-01_01 From Mouth At Confluence With Park River, Us To Enterance Of Conduit (Entire Segment In Pipe Underground). River .32 miles TMDL needed
South Branch Park River-01 CT4400-01_01 From Mouth At Confluence With Park River, Us To Enterance Of Conduit (Entire Segment In Pipe Underground). Rivers and Streams .2 miles TMDL needed
South Branch Park River-02 CT4400-01_02 From Entrance Of Conduit (Segment-01), Us To Confluence With Piper And Trout Brooks, Between Railroad Tracks And Route 173 (New Britian Avenue). River 2.62 miles TMDL needed
South Branch Park River-02 CT4400-01_02 From Entrance Of Conduit (Segment-01), Us To Confluence With Piper And Trout Brooks, Between Railroad Tracks And Route 173 (New Britian Avenue). Rivers and Streams 2.7 miles TMDL needed
Spruce Brook_01 CT4600-13_01 From Mouth At Mattabasset River Us To Source At Lamentation Mountain. Rivers and Streams 5.1 miles
Stony Brook (Suffield)-03 CT4100-00_03 From Confluence With Degrayes Brook (Just Northwest Of Airport), Us To Headwaters (The Confluence Of Rocky Gutter Brook And Rattlesnake Brook), Suffield. River 4.27 miles TMDL needed
Stony Brook (Suffield)-03 CT4100-00_03 From Confluence With Degrayes Brook (Just Northwest Of Airport), Us To Headwaters (The Confluence Of Rocky Gutter Brook And Rattlesnake Brook), Suffield. Rivers and Streams 3.6 miles TMDL needed
Sumner Brook-01 CT4013-00_01 From Mouth At Connecticut River, Middletown, Us To Confuence With Long Hill Brook. River .97 miles TMDL needed
Sumner Brook-01 CT4013-00_01 From Mouth At Connecticut River, Middletown, Us To Confuence With Long Hill Brook. Rivers and Streams .8 miles TMDL needed
Tankerhoosen River-01 CT4503-00_01 From Mouth At Hockanum River, Vernon (Ds Of Route 83/03 Crossing Near Manchester Border ), Us To Tankerhoosen Lake Outlet Dam, Vernon. River 1.51 miles TMDL needed
Tankerhoosen River-01 CT4503-00_01 From Mouth At Hockanum River, Vernon (Ds Of Route 83/03 Crossing Near Manchester Border ), Us To Tankerhoosen Lake Outlet Dam, Vernon. Rivers and Streams 1.7 miles TMDL needed
Trout Brook-01 CT4403-00_01 From Mouth At Confluence With Piper Brook, Above South Branch Park River (Just Ds Of Railroad Crossing, Near New Britian Avenue), West Hartford, Us Under Route 84 Exit 42 (Trout Brook Drive) Ramp. River 1.07 miles TMDL needed
Trout Brook-01 CT4403-00_01 From Mouth At Confluence With Piper Brook, Above South Branch Park River (Just Ds Of Railroad Crossing, Near New Britian Avenue), West Hartford, Us Under Route 84 Exit 42 (Trout Brook Drive) Ramp. Rivers and Streams 1.1 miles TMDL needed
Trout Brook-02 CT4403-00_02 From Us Side Of Route 84 Exit 42 (Trout Brook) Ramp, West Hartford, Us To Park Road Crossing (Entire Segment Flows Through Concrete Channel). Rivers and Streams .9 miles TMDL needed
Trout Brook-02 CT4403-00_02 From Us Side Of Route 84 Exit 42 (Trout Brook) Ramp, West Hartford, Us To Park Road Crossing (Entire Segment Flows Through Concrete Channel). River .88 miles TMDL needed
Trout Brook-03 CT4403-00_03 From Park Road Crossing (Just Ds Of Boulevard Road Crossing), Us To Woodbridge Lake Outlet Dam, West Hartford. River 5.95 miles TMDL needed
Trout Brook-03 CT4403-00_03 From Park Road Crossing (Just Ds Of Boulevard Road Crossing), Us To Woodbridge Lake Outlet Dam, West Hartford. Rivers and Streams 3.4 miles TMDL needed
Union Pond (Manchester) CT4500-00-3-L3_01 Impoundment Of Hockanum River In Manchester At Union Street. Lakes, Reservoirs, and Ponds 50 acres TMDL needed
Union Pond (Manchester) CT4500-00-3-L3_01 Impoundment Of Hockanum River In Manchester At Union Street. Freshwater Lake 49.9 acres TMDL needed
Wadsworth Falls Park Pond CT4607-13-0-L1_01 Small Pond Within Wadsworth Falls State Park, Between Mouths Of Laurel And Wadsworth Brooks, Middlefield. Lakes, Reservoirs, and Ponds acres
Webster Brook-01 CT4603-00_01 From Mouth At Mattabasset River, Us To Headwaters Between Railroad Track And Stamm Road, Just Us Of Route 174 Crossing, Newington. River 3.42 miles TMDL needed
Webster Brook-01 CT4603-00_01 From Mouth At Mattabasset River, Us To Headwaters Between Railroad Track And Stamm Road, Just Us Of Route 174 Crossing, Newington. Rivers and Streams 3.4 miles TMDL needed
Willow Brook (Cromwell)_01 CT4600-27_01 From Mouth At Mattabasset Us To Headwaters Near Junctinof Coles Road And Willow Brook Road, Cromwell. Rivers and Streams 1.4 miles
Willow Brook (New Britain)-01 CT4602-00_01 From Mouth At Mattabasset River, Us To Outlet Of Conduit Under Buell Street, Near Intersection With Route 71a (Kensington Ave, East Of Hart Park), New Britain. Rivers and Streams 3.6 miles TMDL needed
Willow Brook (New Britain)-01 CT4602-00_01 From Mouth At Mattabasset River, Us To Outlet Of Conduit Under Buell Street, Near Intersection With Route 71a (Kensington Ave, East Of Hart Park), New Britain. River 3.37 miles TMDL needed

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Causes of Impairment for Reporting Year 2004

Connecticut, Lower Connecticut

Description of this table
Bacteria 41
Cause Unknown 27
Polychlorinated Biphenyls (PCBs) 4
Algal Growth/Chlorophyll A 2
Mercury 1
Nutrients 1
Organic Enrichment/Low Dissolved Oxygen 1
Pesticides 1

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Cumulative TMDLs by Pollutant

Connecticut, Lower Connecticut Watershed

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Number of TMDLs Completed" value to see a listing of those approved TMDLs for the pollutant.
Number of Causes of
Impairment Addressed
Escherichia Coli (E. Coli) color.gif 44 44
Nitrogen, Total color.gif 2 2
Algal Growth color.gif 1 1
Chlorophyll-A color.gif 1 1
Phosphorus, Total color.gif 1 1

Total: 49 TMDLs; 0 Causes of Impairment



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