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- Assessment Summary
- Causes of Impairment
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Connecticut State Report
Other states that contain this watershed:
Rhode Island, Quinebaug Watershed
Massachusetts, Quinebaug Watershed
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Connecticut, Quinebaug Watershed
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Assessment Summary for Reporting Year 2010
Connecticut, Quinebaug Watershed
Description of this table
Click here to list Threatened and Impaired Waters Only
Click here to list Threatened and Impaired Waters Only
| NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report. | ||||||||
| Waterbody Name | Waterbody ID | Location | Map | Waterbody Type | Size | Units | Status | State TMDL Development Status |
|---|---|---|---|---|---|---|---|---|
| Alexander Lake (Killingly) | CT3700-23-1-L1_01 | Dayville Section Of Killingly. | Waterbody Map | Freshwater Lake | 189.6 | Acres | Good | |
| Anderson Pond (North Stonington) | CT3605-01-1-L1_01 | North Central North Stonington | Waterbody Map | Freshwater Lake | 49.2 | Acres | Good | |
| Aspinook Pond (Canterbury/Griswold/Lisbon) | CT3700-00-5+L4_01 | Impoundment Of Quinebaug River, Parts In Canterbury, Griswold, & Lisbon (Ds Of Segment 02 In Quinebaug River) | Waterbody Map | Freshwater Lake | 308.9 | Acres | Impaired | TMDL needed |
| Beach Pond (Voluntown/Rhode Island) | CT3600-00-1-L1_01 | Eastern Border Of Voluntown With Ri. | Waterbody Map | Freshwater Lake | 407.6 | Acres | Good | |
| Beachdale Pond (Voluntown) | CT3600-00-3-L3_01 | Impoundment Of Pachaug River, Voluntown; Us Of Glasgo And Ds Of Beach Ponds. | Waterbody Map | Freshwater Lake | 37.3 | Acres | Good | |
| Billings Lake (North Stonington) | CT3605-00-1-L1_01 | North Central North Stonington. | Waterbody Map | Freshwater Lake | 94.9 | Acres | Good | |
| Blackwell Brook-01 | CT3711-00_01 | From Mouth At Confluence With Quinebaug River In Northeast Corner Of Canterbury, Us To Headwaters At Small Pond Just Us Of Fay Road Crossing, Pomfret. | Waterbody Map | River | 13.8 | Miles | Good | |
| Broad Brook (Preston)-01 | CT3716-00_01 | From Mouth At Confluence With Quinnebaug River (Ds Of Old Jewett City Road Crossing), At The Preston/Lisbon/Griswold Borders, Us To Lewis Pond Outlet Dam (North Side Of Route 165, Near Intersection With Lewis Road), Preston. | Waterbody Map | River | 4.7 | Miles | Impaired | TMDL needed |
| Crooked Brook (Griswold)-01 | CT3600-05_01 | From Mouth At Confluence With Patchaug River (Just Ds Of Campbell Road Crossing), Us To Crooked Brook Pond Dam At Outlet Of Welsh Pond, Griswold. | Waterbody Map | River | 1.9 | Miles | Good | |
| Doaneville Pond (Griswold/Voluntown) | CT3600-00-3-L5_01 | Eastern Border Of Griswold Just Overlapping Voluntown Border, North Of Rte 165 And East Of Sheldon Rd. Pond Formerly Considered Part Of Glasgo Pond; Separated From Glasgo Pond By Sheldon Rd. | Waterbody Map | Freshwater Lake | 68.4 | Acres | Good | |
| Ekonk Brook-01 | CT3503-00_01 | From Mouth At Confluence With Moosup River (Ds Of River Street Crossing), Us To Headwaters At Lockes Meadow Pond Outlet Dam, Plainfield. | Waterbody Map | River | 4.5 | Miles | Impaired | TMDL needed |
| Fivemile River (Killingly)-01 | CT3400-00_01 | From Mouth At Confluence With Quinebaug River (Just Ds Of Route 6 Crossing), Danielson, Us Through Fivemile Pond To River Entrance At Northwest Portion. | Waterbody Map | River | 1.0 | Miles | Good | |
| Fivemile River (Killingly)-02 | CT3400-00_02 | From Entrance To Fivemile Pond (Northwest Portion), Us To Confluence With Attawaugan Brook, Just West Of Route 395 Crossing. | Waterbody Map | River | 4.5 | Miles | Good | |
| Fivemile River (Killingly-Thompson)-03 | CT3400-00_03 | From Confluence With Attawaugan Brook (Just West Of Route 395 Crossing), Us To Quaddick Reservoir Outlet Dam (Just Us Of Quaddick Road Crossing). Segment Includes Ballouville And Lower Ponds. | Waterbody Map | River | 10.1 | Miles | Good | |
| Fivemile River (Thompson)-04 | CT3400-00_04 | From Inlet To Quaddick Reservoir (Northwest Portion, Also Called Stump Pond), Us To Little (Schoolhouse) Pond Outlet Dam (Just Us Of Jezierski Road Crossing), Thompson. | Waterbody Map | River | 4.5 | Miles | Good | |
| French River-01 | CT3300-00_01 | From Mouth At Confluence With Quinebaug River (Just Ds Of West Thompson Flood Control Dam), Us To North Grosvenordale Pond Outlet Dam (Just Us Of Buckley Hill Road Crossing), Thompson. | Waterbody Map | River | 4.6 | Miles | Impaired | TMDL needed |
| French River-02 | CT3300-00_02 | From Inlet To North Grosvenordale Pond (East Of Route 12, Just Ds Of Langers Pond), Us To Massachusetts State Line. Segment Includes Langers Pond. | Waterbody Map | River | 1.1 | Miles | Good | |
| Glasgo Pond (Griswold/Voluntown) | CT3600-00-3-L6_01 | Impoundment Of Pachaug River, Near Griswold/Voluntown Border, Begining On West Side Of Sheldon Road Crossing, And Ds To East Side Of Route 201 Crossing (Includes Portion South Of Route 165 Crossing). Doaneville Pond Portion Not Included. | Waterbody Map | Freshwater Lake | 104.3 | Acres | Good | |
| Great Meadow Brook-01 | CT3601-00_01 | From Mouth At Confluence With Patchaug River, Us To Mason-Gray Pond Outlet Dam (Just Us Of Campbell Mill Road Crossing), Voluntown. | Waterbody Map | River | 1.1 | Miles | Good | |
| Griggs Pond (Woodstock) | CT3705-00-1-L1_01 | Northwest Corner Of Woodstock. | Waterbody Map | Freshwater Lake | 37.6 | Acres | Good | |
| Hopeville Pond (Griswold) | CT3600-00-3-L8_01 | Impoundment Of Pachaug River, Griswold; Ds Of Pachaug Pond. | Waterbody Map | Freshwater Lake | 106.6 | Acres | Good | |
| Horse Brook-01 | CT3712-02_01 | From Mouth At Confluence With Fry Brook (Parallel To Community Avenue), Us To Headwaters (Just Us Of Route 12 Crossing), Plainfield. | Waterbody Map | River | 3.2 | Miles | Good | |
| Killingly Pond (Killingly/Rhode Island) | CT3404-01-1-L1_01 | Norhteast Corner Of Killingly On Ri Border; A Little Over Half Of The Lake Is Within Ct. | Waterbody Map | Freshwater Lake | 120.5 | Acres | Good | |
| Little (Schoolhouse) Pond (Thompson) | CT3400-00-1-L1_01 | Norhteast Corner Of Thompson, Near Ma Border. Headwaters Of Fivemile River. | Waterbody Map | Freshwater Lake | 65.8 | Acres | Good | |
| Little River (Putnam)-01 | CT3708-00_01 | From Mouth At Confluence With Quinebaug River (Just Ds Of Route 44 Crossing), Putnum, Us To Drinking Water Watershed Boundary (Outlet Of Marsh, Parallel To Peake Brook Road, Ds Of Shepherds Pond), Woodstock (Southeast Corner). | Waterbody Map | River | 2.6 | Miles | Impaired | TMDL needed |
| Little River (Putnam)-02 | CT3708-00_02 | From Drinking Water Watershed Boundary (Outlet Of Marsh, Parallel To Peake Brook Road, Ds Of Shepherds Pond), Woodstock (Southeast Corner), Us To Roseland Lake Outlet Dam (Includes Confluence With Peake Brook And Shepherds Pond). | Waterbody Map | River | 1.8 | Miles | Good | |
| Mashamoquet Brook-01 | CT3710-00_01 | From Mouth At Confluence With Quinebaug River (Parallel To Route 101 On North Side), Us To Confluence With Wolf Den Brook (Us Of Route 101 Crossing), Pomfret. | Waterbody Map | River | 3.1 | Miles | Good | |
| Mashamoquet Brook-02 | CT3710-00_02 | From Confluence With Wolf Den Brook (Just Us Of Route 101 Crossing), Us To Taft Pond Outlet Dam (Us Of Taft Pond Road Crossing), Pomfret. Includes Diversion To Swimming Pond In Mashamoquet State Park. | Waterbody Map | River | 4.4 | Miles | Impaired | TMDL needed |
| Mill Brook (Plainfield)-01 | CT3713-00_01 | From Mouth At Confluence With Quinebaug River (Ds Of Weston Road Crossing), Canterbury, Us To Railroad Crossing, Plainfield. | Waterbody Map | River | 2.0 | Miles | Good | |
| Mill Brook (Plainfield)-02 | CT3713-00_02 | From Railroad Crossing (Ds Of Route 12 Crossing), Plainfield, Us To Headwaters In Large Wetland Area, North Of Rhode Road (East Of I395), Griswold. | Waterbody Map | River | 3.1 | Miles | Good | |
| Moosup Pond (Plainfield) | CT3502-07-1-L1_01 | Northeast Section Of Plainfield. | Waterbody Map | Freshwater Lake | 89.3 | Acres | Good | |
| Moosup River-01 | CT3500-00_01 | From Mouth At Confluence With Quinebaug River, Plainfield, Us To And Including Plainfield North Potw Outfall, Central Village. | Waterbody Map | River | 1.8 | Miles | Good | |
| Moosup River-02 | CT3500-00_02 | From Potw Outfall (Just Ds From Black Hill Road Crossing), Central Village, Us To Brunswick Mill Dam #1(First Impoundment In Almyville, Parallel To Route 14), Plainfield. | Waterbody Map | River | 4.0 | Miles | Good | |
| Moosup River-03 | CT3500-00_03 | From Brunswick Mill Dam #1 (First Impoundment In Almyville, Parallel To Route 14), Plainfield, Us To Rhode Island Border. | Waterbody Map | River | 7.4 | Miles | Impaired | TMDL needed |
| Muddy Brook (Woodstock)-01 | CT3708-01_01 | From Mouth At Inlet To Roseland Lake, Us To Route 197 Crossing, Woodstock. | Waterbody Map | River | 5.4 | Miles | Impaired | TMDL needed |
| Muddy Brook (Woodstock)-02 | CT3708-01_02 | From Route 197 Crossing, Us To Confluence With Moss Brook (Just Ds Of Route 169 Crossing, Sherman Corner Area), Woodstock. | Waterbody Map | River | 2.0 | Miles | Impaired | TMDL needed |
| Muddy Brook (Woodstock)-03 | CT3708-01_03 | From Confluence With Moss Brook (Just Ds Of Route 169 Crossing, Sherman Corner Area), Us To Muddy Pond Outlet, Woodstock. | Waterbody Map | River | 1.8 | Miles | Good | |
| Muddy Pond (Woodstock) | CT3708-01-1-L1_01 | Headwaters Of Muddy Brook, Near Ma Border, Woodstock | Waterbody Map | Freshwater Lake | 38.4 | Acres | Good | |
| Myron Kinney Brook-01 | CT3604-00_01 | From Mouth At Glasgo Pond Inlet (Southeast Side) Near Voluntown/Griswold Border, Us To Headwaters, Parallel To Pandleeton Hill Road (Route 49), North Stonington. | Waterbody Map | River | 4.3 | Miles | Good | |
| North Grosvenordale Pond Impoundment (Thompson) | CT3300-00-3+L3_01 | Impoundment Of French River In North Central Thompson, Near Ma Border. | Waterbody Map | Freshwater Lake | 58.7 | Acres | Good | |
| North Running Brook-01 | CT3708-10_01 | From Mouth At Confluence With Muddy Brook, Us To Runoff Ditch From Farm Field (300ft Us Of Farm Road Crossing) (Farm Road Crossing Is 900ft Us Of Muddy Brook Confluence, Farm Road Is Off Of Child Hill Road), Woodstock. | Waterbody Map | River | .2 | Miles | Impaired | TMDL needed |
| North Running Brook-02 | CT3708-10_02 | From Runoff Ditch From Farm Field (300ft Us Of Farm Road Crossing) (Farm Road Crossing Is 900ft Us Of Muddy Brook Confluence, Farm Road Is Off Of Child Hill Road), Us To Headwaters (Parallel To Route 169, Us Of Joy Road Crossing), Woodstock. | Waterbody Map | River | 2.8 | Miles | Good | |
| Pachaug Pond (Griswold) | CT3600-00-3-L7_01 | Impoundment Of Pachaug River, Eastern Griswold. | Waterbody Map | Freshwater Lake | 836.9 | Acres | Good | |
| Pachaug River-01 | CT3600-00_01 | From Mouth At Confluence With Quinebaug River, Griswold, Us To Ashland Pond Outlet (Just Us Of Ashland Street Crossing). | Waterbody Map | River | .8 | Miles | Good | |
| Pachaug River-02 | CT3600-00_02 | From Ashland Pond Inlet (Southeast Portion, Us Of Norman Road Crossing), Us To Hopeville Pond Outlet Dam (Ds Of Edmund Road Crossing), Griswold. | Waterbody Map | River | .9 | Miles | Good | |
| Pachaug River-03 | CT3600-00_03 | From Inlet Of Hopeville Pond At Bitgood Road Crossing, Us To Patchaug Pond Outlet Dam (Us Of Voluntown Road (Route83) Crossing, Griswold. | Waterbody Map | River | 2.0 | Miles | Good | |
| Pachaug River-04 | CT3600-00_04 | From Doanville Pond Inlet (Just Ds Of Lillibridge Avenue Crossing), Griswold, Us To Beachdale Pond Outlet Dam, Voluntown. | Waterbody Map | River | 1.1 | Miles | Good | |
| Pachaug River-05 | CT3600-00_05 | From Inlet To Beachdale Pond (Just Ds From Ekonk Hill Road (Route 49) Crossing), Us To Beach Pond Outlet Dam (Parallel To North Shore Road), Voluntown. | Waterbody Map | River | 2.7 | Miles | Good | |
| Quaddick Reservoir (Thompson) | CT3400-00-2-L11_01 | Southeast Corner Of Thompson; Impoundment Of The Fivemile River. | Waterbody Map | Freshwater Lake | 391.3 | Acres | Good | |
| Quanduck Brook-01 | CT3501-00_01 | From Mouth At Confluence With Moosup River, Us To Rhode Island Border (Parallel With Snake Meadow Hill Road). | Waterbody Map | River | 4.1 | Miles | Good | |
| Quinebaug River-01 | CT3700-00_01 | From Mouth At Confluence With Shetucket River, At Lisbon/Norwich Border, Us To Aspinook Pond Outlet Dam (Us Of River Road (Route 12) Crossing), Lisbon/Griswold Border. | Waterbody Map | River | 7.5 | Miles | Impaired | TMDL needed |
| Quinebaug River-02 | CT3700-00_02 | From Aspinook Pond Inlet (At Butts Bridge Road Crossing), Us To Confuence With Mill Brook, Canterbury. | Waterbody Map | River | 3.0 | Miles | Good | |
| Quinebaug River-03 | CT3700-00_03 | From Confluence With Mill Brook, Near Yawarsky Landfill, Us To Confluence With Moosup River (River Forms Town Boundary For Canterbury And Plainfield). | Waterbody Map | River | 6.3 | Miles | Good | |
| Quinebaug River-04 | CT3700-00_04 | From Confluence With Moosup River (River Forms Town Boundary For Canterbury And Plainfield), Us To Putnum Potw (Parallel To Kennedy Drive Near I-395), Putnam. | Waterbody Map | River | 17.6 | Miles | Impaired | TMDL needed |
| Quinebaug River-05 | CT3700-00_05 | From Just Us Of Putnum Potw (Just Ds Of Railroad Crossing), Us To Confluence With French River, Thompson. | Waterbody Map | River | 3.3 | Miles | Impaired | TMDL needed |
| Quinebaug River-06 | CT3700-00_06 | From Confluence With French River, Us To West Thompson Flood Control Dam Outlet (Thompson Reservoir. | Waterbody Map | River | .2 | Miles | Good | |
| Quinebaug River-07 | CT3700-00_07 | From Inlet To West Thompson Lake (Reservoir) Just Ds Of Blain Road Crossing, Us To Massachusetts Border (Us Of Route 197 Crossing), Thompson. | Waterbody Map | River | 6.4 | Miles | Impaired | TMDL needed |
| Rocky Brook-01 | CT3401-00_01 | From Mouth At Confluence With Fivemile River (Ds Of New Road Crossing), Us To Confluence With Unnamed Tributary Near East Thompson Road (In Marsh), Thompson. | Waterbody Map | River | .7 | Miles | Good | |
| Rocky Brook-02 | CT3401-00_02 | From Confluence With Unnamed Tributary (In Marsh On South Side Of East Thompson Road), Us To Massachusetts Border, Thompson. | Waterbody Map | River | .2 | Miles | Good | |
| Roseland Lake (Woodstock) | CT3708-00-1-L1_01 | Southeast Section Of Woodstock. | Waterbody Map | Freshwater Lake | 96.4 | Acres | Impaired | TMDL needed |
| Wappaquoia Brook-01 | CT3709-00_01 | From Mouth At Confluence With Mashamoquet Brook (East Of Route 169), Us To Hollow Pond Outlet Dam (Just Us Of Brayman Hollow Road (Route 244) Crossing), Pomfret. | Waterbody Map | River | 3.2 | Miles | Good | |
| Wauregan (Quinebuag) Pond (Killingly) | CT3700-28-1-L1_01 | Southwestern Corner Of Killingly. | Waterbody Map | Freshwater Lake | 71.1 | Acres | Good | |
| West Thompson Lake (Thompson) | CT3700-00-2+L1_01 | Impoundment Of Quinebaug River In Thompson. | Waterbody Map | Freshwater Lake | 189.3 | Acres | Impaired | TMDL needed |
| Whetstone Brook-01 | CT3404-00_01 | From Mouth At Confluence With Fivemile River, Us To Bog Meadow Reservoir Outlet Dam, Killingly. | Waterbody Map | River | 4.6 | Miles | Good | |
Causes of Impairment for Reporting Year 2010
Connecticut, Quinebaug
Description of this table| NOTE: Click on the underlined "Cause of Impairment" value to see a listing of those waters with that cause of impairment. | |||||||||||||||
| Cause of Impairment | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Enterococcus Bacteria | 3.3 | ||||||||||||||
| Chlorophyll-A | 498.1 | ||||||||||||||
| Cause Unknown | 35.3 | ||||||||||||||
| Excess Algal Growth | 498.1 | ||||||||||||||
| Nutrient/Eutrophication Biological Indicators | 594.5 | ||||||||||||||
| Escherichia Coli (E. Coli) | 71.4 | ||||||||||||||
Probable Sources Contributing to Impairments for Reporting Year 2010
Connecticut, Quinebaug Watershed
Description of this table| Probable Source | Size of Assessed Waters with Probable Sources of Impairments | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Agriculture | 9.9 | 285.7 | |||||||||||||
| Internal Nutrient Recycling | 189.3 | ||||||||||||||
| Municipal Point Source Discharges | 189.3 | ||||||||||||||
| Non-Irrigated Crop Production | .2 | ||||||||||||||
| Source Unknown | 73.4 | 594.5 | |||||||||||||
| Sources Outside State Jurisdiction Or Borders | 189.3 | ||||||||||||||
| Waterfowl | 96.4 | ||||||||||||||
TMDL Alternatives by Cause of Impairment for Reporting Year 2010
Connecticut, Quinebaug Watershed
No TMDL Alternatives reported.
Cumulative TMDLs by Pollutant
Connecticut, Quinebaug 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. | ||
| Pollutant | Number of TMDLs Completed | Number of Causes of Impairment Addressed |
|---|---|---|
| Escherichia Coli (E. Coli) |  5 |
5 |
Total: 5 TMDLs; 0 Causes of Impairment
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