Watershed Quality Assessment Report | WATERS

Assessment Summary
Causes of Impairment
Probable Sources Contributing to Impairment
TMDL Alternatives by Cause of Impairment
Cumulative TMDLs by Pollutant

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Massachusetts, Merrimack. Massachusetts, New Hampshire. Watershed

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Assessment Summary for Reporting Year 2010
Massachusetts, Merrimack. Massachusetts, New Hampshire. Watershed

Description of this table
Click here to list Threatened and Impaired Waters Only

Waterbody Name	Waterbody ID	Location	Map	Waterbody Type	Size	Units	Status	State TMDL Development Status
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Ames Pond	MA83001	Tewksbury	Waterbody Map	Freshwater Lake	76.5	Acres	Impaired	TMDL needed
Back River	MA84A-16	New Hampshire State Line, Amesbury To Inlet Clarks Pond, Amesbury.	Waterbody Map	River	2.7	Miles	Impaired	TMDL needed
Bailey Pond	MA84003	Amesbury	Waterbody Map	Freshwater Lake	13.0	Acres	Not_Assessed
Bakers Meadow Pond	MA83002	Andover	Waterbody Map	Freshwater Lake	21.2	Acres	Not_Assessed
Ballardvale Impoundment	MA83011	Andover (Lowell Junction Pond)	Waterbody Map	Freshwater Lake	35.3	Acres	Impaired	TMDL needed
Bare Meadow Brook	MA84A-18	Headwaters, Methuen To Confluence With Merrimack River, Methuen.	Waterbody Map	River	3.0	Miles	Impaired	TMDL needed
Beaver Brook	MA84A-11	New Hampshire State Line, Dracut To Confluence With Merrimack River, Lowell.	Waterbody Map	River	4.8	Miles	Impaired	TMDL needed
Beaver Brook	MA84B-02	Outlet Mill Pond, Littleton To Inlet Forge Pond, Westford.	Waterbody Map	River	4.9	Miles	Impaired	TMDL needed
Beaver Brook	MA84B-05	Headwaters, Outlet Of "Wolf Swamp", Boxborough To Inlet Of Mill Pond, Littleton.	Waterbody Map	River	5.5	Miles	Not_Assessed
Black Brook	MA84A-17	Headwaters, Chelmsford To Confluence With Merrimack River, Lowell.	Waterbody Map	River	2.3	Miles	Impaired	TMDL needed
Butterfield Pond	MA83003	Burlington/Lexington	Waterbody Map	Freshwater Lake	3.0	Acres	Impaired	TMDL needed
Chadwicks Pond	MA84006	Haverhill/Boxford	Waterbody Map	Freshwater Lake	173.0	Acres	Impaired	TMDL needed
Cobbler Brook	MA84A-22	Headwaters, Merrimac To Confluence With Merrimack River, Merrimac.	Waterbody Map	River	4.4	Miles	Impaired	TMDL needed
Content Brook	MA83-09	Outlet Richardson Pond, Billerica, To Confluence With Shawsheen River, Tewksbury.	Waterbody Map	River	2.4	Miles	Good
Crystal Lake	MA84010	Haverhill	Waterbody Map	Freshwater Lake	161.0	Acres	Impaired	TMDL needed
Deep Brook	MA84A-21	Headwaters East Of Everett Turnpike, Tyngsborough To Confluence With Merrimack River, Chelmsford.	Waterbody Map	River	2.9	Miles	Impaired	TMDL needed
Elm Brook	MA83-05	Headwaters, Lincoln To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	5.0	Miles	Impaired	TMDL needed
Fawn Lake	MA83004	Bedford	Waterbody Map	Freshwater Lake	11.8	Acres	Not_Assessed
Flint Pond	MA84012	Tyngsborough	Waterbody Map	Freshwater Lake	72.0	Acres	Impaired	TMDL needed
Forest Lake	MA84014	Methuen	Waterbody Map	Freshwater Lake	48.0	Acres	Impaired	TMDL needed
Forge Pond	MA84015	Westford/Littleton	Waterbody Map	Freshwater Lake	203.0	Acres	Impaired	TMDL completed
Fosters Pond	MA83005	Andover/Wilmington	Waterbody Map	Freshwater Lake	109.4	Acres	Impaired	TMDL needed
Gravel Pit Pond	MA83007	Andover (Hussey Brook Pond East)	Waterbody Map	Freshwater Lake	4.6	Acres	Impaired	Non-pollutant impairment
Haggetts Pond	MA84022	Andover	Waterbody Map	Freshwater Lake	211.0	Acres	Impaired	TMDL needed
Hoveys Pond	MA84025	Boxford	Waterbody Map	Freshwater Lake	36.0	Acres	Impaired	TMDL needed
Hussey Pond	MA83009	Andover	Waterbody Map	Freshwater Lake	1.4	Acres	Impaired	TMDL needed
Johnson Creek	MA84A-15	Headwaters, Groveland (Excluding Intermittent Portion) To Confluence With Merrimack River, Groveland/Haverhill.	Waterbody Map	River	1.1	Miles	Not_Assessed
Johnsons Pond	MA84027	Groveland/Boxford	Waterbody Map	Freshwater Lake	194.0	Acres	Impaired	TMDL needed
Kenoza Lake	MA84028	Haverhill	Waterbody Map	Freshwater Lake	240.0	Acres	Impaired	TMDL needed
Kiln Brook	MA83-10	Outlet Unnamed Pond (In Pine Meadows Country Club), Lexington, To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	1.5	Miles	Impaired	TMDL completed
Knops Pond/Lost Lake	MA84084	Groton	Waterbody Map	Freshwater Lake	187.0	Acres	Impaired	TMDL completed
Lake Attitash	MA84002	Amesbury/Merrimac	Waterbody Map	Freshwater Lake	369.0	Acres	Impaired	TMDL needed
Lake Cochichewick	MA84008	North Andover	Waterbody Map	Freshwater Lake	575.0	Acres	Impaired	TMDL needed
Lake Mascuppic	MA84037	Tyngsborough/Dracut	Waterbody Map	Freshwater Lake	210.0	Acres	Not_Assessed
Lake Pentucket	MA84051	Haverhill	Waterbody Map	Freshwater Lake	38.0	Acres	Impaired	TMDL needed
Lake Saltonstall	MA84059	Haverhill	Waterbody Map	Freshwater Lake	44.0	Acres	Impaired	TMDL needed
Lawrence Brook	MA84A-20	Headwaters, Tyngsborough (Excluding Intermittent Portion) To Confluence With Merrimack River, Tyngsborough.	Waterbody Map	River	2.0	Miles	Not_Assessed
Little River	MA84A-09	New Hampshire State Line, Haverhill To Confluence With Merrimack River, Haverhill.	Waterbody Map	River	4.6	Miles	Impaired	TMDL needed
Locust Pond	MA84031	Tyngsborough	Waterbody Map	Freshwater Lake	16.0	Acres	Impaired	TMDL completed
Long Pond	MA83010	Tewksbury	Waterbody Map	Freshwater Lake	42.5	Acres	Impaired	TMDL needed
Long Pond	MA84032	Dracut/Tyngsborough (Size Indicates Portion In Massachusetts)	Waterbody Map	Freshwater Lake	137.0	Acres	Impaired	TMDL needed
Martins Pond Brook	MA84A-19	Outlet Martins Pond, Groton To Inlet Lost Lake, Groton.	Waterbody Map	River	2.3	Miles	Impaired	TMDL needed
Massapoag Pond	MA84087	Dunstable/Groton/Tyngsborough	Waterbody Map	Freshwater Lake	111.0	Acres	Impaired	TMDL needed
Meadow Brook	MA83-12	Outlet Ames Pond, Tewksbury, To Confluence With Strong Water Brook, Tewksbury.	Waterbody Map	River	1.7	Miles	Good
Merrimack River	MA84A-01	State Line At Hudson, Nh/Tyngsborough, Ma To Pawtucket Dam, Lowell.	Waterbody Map	River	9.0	Miles	Impaired	TMDL needed
Merrimack River	MA84A-02	Pawtucket Dam, Lowell To Lowell Regional Wastewater Utilities Outfall At Duck Island, Lowell.	Waterbody Map	River	3.2	Miles	Impaired	TMDL needed
Merrimack River	MA84A-03	Lowell Regional Wastewater Utilities Outfall At Duck Island, Lowell To Essex Dam, Lawrence.	Waterbody Map	River	8.8	Miles	Impaired	TMDL needed
Merrimack River	MA84A-04	Essex Dam, Lawrence To Confluence With Little River, Haverhill.	Waterbody Map	River	10.0	Miles	Impaired	TMDL needed
Merrimack River	MA84A-05	Confluence Little River, Haverhill To Confluence Indian River, West Newbury/Amesbury.	Waterbody Map	Estuary	1.8	Square Miles	Impaired	TMDL needed
Merrimack River	MA84A-06	Confluence Indian River, West Newbury/Amesbury To Mouth At Atlantic Ocean, Newburyport/Salisbury (Includes Back River, Salisbury).	Waterbody Map	Estuary	4.5	Square Miles	Impaired	TMDL needed
Mill Pond	MA84038	[North Basin] Littleton	Waterbody Map	Freshwater Lake	30.0	Acres	Impaired	TMDL needed
Mill Pond	MA84039	West Newbury	Waterbody Map	Freshwater Lake	18.0	Acres	Not_Assessed
Mill Pond	MA84081	[South Basin] Littleton	Waterbody Map	Freshwater Lake	12.0	Acres	Impaired	TMDL needed
Millvale Reservoir	MA84041	Haverhill	Waterbody Map	Freshwater Lake	44.0	Acres	Impaired	TMDL needed
Newfield Pond	MA84046	Chelmsford	Waterbody Map	Freshwater Lake	77.0	Acres	Impaired	TMDL needed
Plum Island River	MA84A-27	From Chaces Island, Merimack River Estuary, To The "High Sandy" Sand Bar Just North Of The Confluence With Pine Island Creek, Newbury (Formerly Encompassed In Ma84a-23).	Waterbody Map	Estuary	.1	Square Miles	Impaired	TMDL needed
Pomps Pond	MA83014	Andover	Waterbody Map	Freshwater Lake	24.6	Acres	Impaired	TMDL needed
Pond Street Pond	MA83021	Billerica (Unnamed Pond West Of Pond Street)	Waterbody Map	Freshwater Lake	3.6	Acres	Not_Assessed
Powwow River	MA84A-08	Tidal Portion, Just Downstream Of Main Street, Amesbury To Confluence With Merrimack River, Amesbury.	Waterbody Map	Estuary	.1	Square Miles	Impaired	TMDL needed
Powwow River	MA84A-25	Outlet Of Lake Gardner, Amesbury To Tidal Portion, Just Downstream Of Main Street, Amesbury.	Waterbody Map	River	.6	Miles	Impaired	TMDL needed
Powwow River	MA84A-28	Headwaters, Outlet Tuxbury Pond, Amesbury To New Hampshire State Line, Amesbury.	Waterbody Map	River	2.9	Miles	Impaired	TMDL needed
Richardson Brook	MA84A-12	Headwaters, Dracut (Excluding Intermittent Portion) To Confluence With Merrimack River, Dracut.	Waterbody Map	River	1.9	Miles	Impaired	Non-pollutant impairment
Richardson Pond North	MA83020	Billerica/Tewksbury (Richardson Pond North)	Waterbody Map	Freshwater Lake	45.8	Acres	Not_Assessed
Rogers Brook	MA83-04	From Outlet Of Unnamed Impoundment Upstream Of Morton Street, Andover (Prior To 1997 Cycle Listed As "Headwaters Billerica...") To Confluence With Shawsheen River, Andover.	Waterbody Map	River	1.3	Miles	Impaired	TMDL needed
Round Pond	MA83018	Tewksbury	Waterbody Map	Freshwater Lake	24.9	Acres	Not_Assessed
Sandy Brook	MA83-13	Headwaters North Of Bedford Street And East Of Fairfax Street To Confluence With Vine Brook, Burlington.	Waterbody Map	River	1.2	Miles	Impaired	TMDL completed
Shawsheen River	MA83-01	Summer Street (Historcally Listed As Maguire Road) To Confluence With Spring Brook, Bedford.	Waterbody Map	River	1.6	Miles	Impaired	TMDL needed
Shawsheen River	MA83-08	Headwater, North Of Folly Pond And North Great Road, Lincoln To Summer Street, Bedford.	Waterbody Map	River	2.1	Miles	Impaired	TMDL needed
Shawsheen River	MA83-17	Confluence With Spring Brook, Bedford To The Burlington Water Department'S Surface Water Intake, Billerica. (Formerly Part Of Segment Ma83-02, Changed For 2004 Cycle)	Waterbody Map	River	5.7	Miles	Impaired	TMDL needed
Shawsheen River	MA83-18	Burlington Water Department'S Surface Water Intake, Billerica To The Ballardvale Impoundment Dam, Andover. (Formerly Part Of Segment Ma83-02, Changed For 2004 Cycle)	Waterbody Map	River	10.1	Miles	Impaired	TMDL needed
Shawsheen River	MA83-19	Outlet Of Ballardvale Impoundment, Andover To The Confluence With The Merrimack River, Lawrence. (Formerly Part Of Segment Ma83-02 And All Of Ma83-03, Changed For 2004 Cycle)	Waterbody Map	River	8.4	Miles	Impaired	TMDL needed
Spectacle Pond	MA84089	Littleton/Ayer	Waterbody Map	Freshwater Lake	79.0	Acres	Impaired	TMDL needed
Spicket River	MA84A-10	New Hampshire State Line, Methuen To Confluence With Merrimack River, Lawrence.	Waterbody Map	River	5.8	Miles	Impaired	TMDL needed
Spring Brook	MA83-14	Wetland Northeast Of Route 3 Billerica, To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	2.5	Miles	Impaired	TMDL completed
Stevens Pond	MA84064	North Andover	Waterbody Map	Freshwater Lake	23.0	Acres	Impaired	TMDL needed
Stony Brook	MA84B-03	Outlet Forge Pond, Westford To Brookside Road, Westford.	Waterbody Map	River	6.5	Miles	Impaired	TMDL needed
Stony Brook	MA84B-04	Brookside Road, Westford To Confluence With Merrimack River, Chelmsford.	Waterbody Map	River	3.4	Miles	Impaired	TMDL needed
Strong Water Brook	MA83-07	Headwaters Northeast Of Long Pond, Tewksbury To Confluence With Shawsheen River, Tewksbury.	Waterbody Map	River	4.9	Miles	Impaired	TMDL completed
Trout Brook	MA84A-13	Headwaters, Dracut To Confluence With Richardson Brook, Dracut.	Waterbody Map	River	2.6	Miles	Not_Assessed
Trull Brook	MA84A-14	Source, Tewksbury (Excluding Intermittent Portion) To Confluence With Merrimack River, Tewksbury.	Waterbody Map	River	2.1	Miles	Not_Assessed
Unnamed Tributary	MA83-15	Unnamed Tributary To Meadow Brook, Also Known As "Pinnacle Brook" - From Small Wetland East Of Route 93, Andover, To Confluence With Meadow Brook, Tewksbury (Includes Intermittent Portion).	Waterbody Map	River	2.1	Miles	Impaired	TMDL needed
Unnamed Tributary	MA83-16	Also Known As "Fosters Brook" - Outlet Fosters Pond, Andover Through River Street Pond To Confluence With Shawsheen River At Lowell Junction Pond, Andover.	Waterbody Map	River	1.0	Miles	Good
Unnamed Tributary	MA84B-01	(Locally Known As Reedy Meadow Brook) Headwaters, Outlet Of Small Unnamed Impoundment Upstream Of Bruce Street, Littleton To Inlet Mill Pond, Littleton.	Waterbody Map	River	1.5	Miles	Impaired	TMDL needed
Uptons Pond	MA84075	Tyngsborough	Waterbody Map	Freshwater Lake	6.0	Acres	Not_Assessed
Vine Brook	MA83-06	Headwaters (Southeast Of Granny Hill) Near Grant Street, Lexington To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	6.8	Miles	Impaired	TMDL completed
Ward Pond	MA84096	Palis Id Changed From 35094 To 84096 On October 10, 1997. (Wbid From Ma35094 To Ma84096) Ashburnham	Waterbody Map	Freshwater Lake	54.0	Acres	Impaired	TMDL needed

Description of this table
Click here to list All Assessed Waters

Waterbody Name	Waterbody ID	Location	Map	Waterbody Type	Size	Units	Status	State TMDL Development Status
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Ames Pond	MA83001	Tewksbury	Waterbody Map	Freshwater Lake	76.5	Acres	Impaired	TMDL needed
Back River	MA84A-16	New Hampshire State Line, Amesbury To Inlet Clarks Pond, Amesbury.	Waterbody Map	River	2.7	Miles	Impaired	TMDL needed
Ballardvale Impoundment	MA83011	Andover (Lowell Junction Pond)	Waterbody Map	Freshwater Lake	35.3	Acres	Impaired	TMDL needed
Bare Meadow Brook	MA84A-18	Headwaters, Methuen To Confluence With Merrimack River, Methuen.	Waterbody Map	River	3.0	Miles	Impaired	TMDL needed
Beaver Brook	MA84A-11	New Hampshire State Line, Dracut To Confluence With Merrimack River, Lowell.	Waterbody Map	River	4.8	Miles	Impaired	TMDL needed
Beaver Brook	MA84B-02	Outlet Mill Pond, Littleton To Inlet Forge Pond, Westford.	Waterbody Map	River	4.9	Miles	Impaired	TMDL needed
Black Brook	MA84A-17	Headwaters, Chelmsford To Confluence With Merrimack River, Lowell.	Waterbody Map	River	2.3	Miles	Impaired	TMDL needed
Butterfield Pond	MA83003	Burlington/Lexington	Waterbody Map	Freshwater Lake	3.0	Acres	Impaired	TMDL needed
Chadwicks Pond	MA84006	Haverhill/Boxford	Waterbody Map	Freshwater Lake	173.0	Acres	Impaired	TMDL needed
Cobbler Brook	MA84A-22	Headwaters, Merrimac To Confluence With Merrimack River, Merrimac.	Waterbody Map	River	4.4	Miles	Impaired	TMDL needed
Crystal Lake	MA84010	Haverhill	Waterbody Map	Freshwater Lake	161.0	Acres	Impaired	TMDL needed
Deep Brook	MA84A-21	Headwaters East Of Everett Turnpike, Tyngsborough To Confluence With Merrimack River, Chelmsford.	Waterbody Map	River	2.9	Miles	Impaired	TMDL needed
Elm Brook	MA83-05	Headwaters, Lincoln To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	5.0	Miles	Impaired	TMDL needed
Flint Pond	MA84012	Tyngsborough	Waterbody Map	Freshwater Lake	72.0	Acres	Impaired	TMDL needed
Forest Lake	MA84014	Methuen	Waterbody Map	Freshwater Lake	48.0	Acres	Impaired	TMDL needed
Forge Pond	MA84015	Westford/Littleton	Waterbody Map	Freshwater Lake	203.0	Acres	Impaired	TMDL completed
Fosters Pond	MA83005	Andover/Wilmington	Waterbody Map	Freshwater Lake	109.4	Acres	Impaired	TMDL needed
Gravel Pit Pond	MA83007	Andover (Hussey Brook Pond East)	Waterbody Map	Freshwater Lake	4.6	Acres	Impaired	Non-pollutant impairment
Haggetts Pond	MA84022	Andover	Waterbody Map	Freshwater Lake	211.0	Acres	Impaired	TMDL needed
Hoveys Pond	MA84025	Boxford	Waterbody Map	Freshwater Lake	36.0	Acres	Impaired	TMDL needed
Hussey Pond	MA83009	Andover	Waterbody Map	Freshwater Lake	1.4	Acres	Impaired	TMDL needed
Johnsons Pond	MA84027	Groveland/Boxford	Waterbody Map	Freshwater Lake	194.0	Acres	Impaired	TMDL needed
Kenoza Lake	MA84028	Haverhill	Waterbody Map	Freshwater Lake	240.0	Acres	Impaired	TMDL needed
Kiln Brook	MA83-10	Outlet Unnamed Pond (In Pine Meadows Country Club), Lexington, To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	1.5	Miles	Impaired	TMDL completed
Knops Pond/Lost Lake	MA84084	Groton	Waterbody Map	Freshwater Lake	187.0	Acres	Impaired	TMDL completed
Lake Attitash	MA84002	Amesbury/Merrimac	Waterbody Map	Freshwater Lake	369.0	Acres	Impaired	TMDL needed
Lake Cochichewick	MA84008	North Andover	Waterbody Map	Freshwater Lake	575.0	Acres	Impaired	TMDL needed
Lake Pentucket	MA84051	Haverhill	Waterbody Map	Freshwater Lake	38.0	Acres	Impaired	TMDL needed
Lake Saltonstall	MA84059	Haverhill	Waterbody Map	Freshwater Lake	44.0	Acres	Impaired	TMDL needed
Little River	MA84A-09	New Hampshire State Line, Haverhill To Confluence With Merrimack River, Haverhill.	Waterbody Map	River	4.6	Miles	Impaired	TMDL needed
Locust Pond	MA84031	Tyngsborough	Waterbody Map	Freshwater Lake	16.0	Acres	Impaired	TMDL completed
Long Pond	MA83010	Tewksbury	Waterbody Map	Freshwater Lake	42.5	Acres	Impaired	TMDL needed
Long Pond	MA84032	Dracut/Tyngsborough (Size Indicates Portion In Massachusetts)	Waterbody Map	Freshwater Lake	137.0	Acres	Impaired	TMDL needed
Martins Pond Brook	MA84A-19	Outlet Martins Pond, Groton To Inlet Lost Lake, Groton.	Waterbody Map	River	2.3	Miles	Impaired	TMDL needed
Massapoag Pond	MA84087	Dunstable/Groton/Tyngsborough	Waterbody Map	Freshwater Lake	111.0	Acres	Impaired	TMDL needed
Merrimack River	MA84A-01	State Line At Hudson, Nh/Tyngsborough, Ma To Pawtucket Dam, Lowell.	Waterbody Map	River	9.0	Miles	Impaired	TMDL needed
Merrimack River	MA84A-02	Pawtucket Dam, Lowell To Lowell Regional Wastewater Utilities Outfall At Duck Island, Lowell.	Waterbody Map	River	3.2	Miles	Impaired	TMDL needed
Merrimack River	MA84A-03	Lowell Regional Wastewater Utilities Outfall At Duck Island, Lowell To Essex Dam, Lawrence.	Waterbody Map	River	8.8	Miles	Impaired	TMDL needed
Merrimack River	MA84A-04	Essex Dam, Lawrence To Confluence With Little River, Haverhill.	Waterbody Map	River	10.0	Miles	Impaired	TMDL needed
Merrimack River	MA84A-05	Confluence Little River, Haverhill To Confluence Indian River, West Newbury/Amesbury.	Waterbody Map	Estuary	1.8	Square Miles	Impaired	TMDL needed
Merrimack River	MA84A-06	Confluence Indian River, West Newbury/Amesbury To Mouth At Atlantic Ocean, Newburyport/Salisbury (Includes Back River, Salisbury).	Waterbody Map	Estuary	4.5	Square Miles	Impaired	TMDL needed
Mill Pond	MA84038	[North Basin] Littleton	Waterbody Map	Freshwater Lake	30.0	Acres	Impaired	TMDL needed
Mill Pond	MA84081	[South Basin] Littleton	Waterbody Map	Freshwater Lake	12.0	Acres	Impaired	TMDL needed
Millvale Reservoir	MA84041	Haverhill	Waterbody Map	Freshwater Lake	44.0	Acres	Impaired	TMDL needed
Newfield Pond	MA84046	Chelmsford	Waterbody Map	Freshwater Lake	77.0	Acres	Impaired	TMDL needed
Plum Island River	MA84A-27	From Chaces Island, Merimack River Estuary, To The "High Sandy" Sand Bar Just North Of The Confluence With Pine Island Creek, Newbury (Formerly Encompassed In Ma84a-23).	Waterbody Map	Estuary	.1	Square Miles	Impaired	TMDL needed
Pomps Pond	MA83014	Andover	Waterbody Map	Freshwater Lake	24.6	Acres	Impaired	TMDL needed
Powwow River	MA84A-08	Tidal Portion, Just Downstream Of Main Street, Amesbury To Confluence With Merrimack River, Amesbury.	Waterbody Map	Estuary	.1	Square Miles	Impaired	TMDL needed
Powwow River	MA84A-25	Outlet Of Lake Gardner, Amesbury To Tidal Portion, Just Downstream Of Main Street, Amesbury.	Waterbody Map	River	.6	Miles	Impaired	TMDL needed
Powwow River	MA84A-28	Headwaters, Outlet Tuxbury Pond, Amesbury To New Hampshire State Line, Amesbury.	Waterbody Map	River	2.9	Miles	Impaired	TMDL needed
Richardson Brook	MA84A-12	Headwaters, Dracut (Excluding Intermittent Portion) To Confluence With Merrimack River, Dracut.	Waterbody Map	River	1.9	Miles	Impaired	Non-pollutant impairment
Rogers Brook	MA83-04	From Outlet Of Unnamed Impoundment Upstream Of Morton Street, Andover (Prior To 1997 Cycle Listed As "Headwaters Billerica...") To Confluence With Shawsheen River, Andover.	Waterbody Map	River	1.3	Miles	Impaired	TMDL needed
Sandy Brook	MA83-13	Headwaters North Of Bedford Street And East Of Fairfax Street To Confluence With Vine Brook, Burlington.	Waterbody Map	River	1.2	Miles	Impaired	TMDL completed
Shawsheen River	MA83-01	Summer Street (Historcally Listed As Maguire Road) To Confluence With Spring Brook, Bedford.	Waterbody Map	River	1.6	Miles	Impaired	TMDL needed
Shawsheen River	MA83-08	Headwater, North Of Folly Pond And North Great Road, Lincoln To Summer Street, Bedford.	Waterbody Map	River	2.1	Miles	Impaired	TMDL needed
Shawsheen River	MA83-17	Confluence With Spring Brook, Bedford To The Burlington Water Department'S Surface Water Intake, Billerica. (Formerly Part Of Segment Ma83-02, Changed For 2004 Cycle)	Waterbody Map	River	5.7	Miles	Impaired	TMDL needed
Shawsheen River	MA83-18	Burlington Water Department'S Surface Water Intake, Billerica To The Ballardvale Impoundment Dam, Andover. (Formerly Part Of Segment Ma83-02, Changed For 2004 Cycle)	Waterbody Map	River	10.1	Miles	Impaired	TMDL needed
Shawsheen River	MA83-19	Outlet Of Ballardvale Impoundment, Andover To The Confluence With The Merrimack River, Lawrence. (Formerly Part Of Segment Ma83-02 And All Of Ma83-03, Changed For 2004 Cycle)	Waterbody Map	River	8.4	Miles	Impaired	TMDL needed
Spectacle Pond	MA84089	Littleton/Ayer	Waterbody Map	Freshwater Lake	79.0	Acres	Impaired	TMDL needed
Spicket River	MA84A-10	New Hampshire State Line, Methuen To Confluence With Merrimack River, Lawrence.	Waterbody Map	River	5.8	Miles	Impaired	TMDL needed
Spring Brook	MA83-14	Wetland Northeast Of Route 3 Billerica, To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	2.5	Miles	Impaired	TMDL completed
Stevens Pond	MA84064	North Andover	Waterbody Map	Freshwater Lake	23.0	Acres	Impaired	TMDL needed
Stony Brook	MA84B-03	Outlet Forge Pond, Westford To Brookside Road, Westford.	Waterbody Map	River	6.5	Miles	Impaired	TMDL needed
Stony Brook	MA84B-04	Brookside Road, Westford To Confluence With Merrimack River, Chelmsford.	Waterbody Map	River	3.4	Miles	Impaired	TMDL needed
Strong Water Brook	MA83-07	Headwaters Northeast Of Long Pond, Tewksbury To Confluence With Shawsheen River, Tewksbury.	Waterbody Map	River	4.9	Miles	Impaired	TMDL completed
Unnamed Tributary	MA83-15	Unnamed Tributary To Meadow Brook, Also Known As "Pinnacle Brook" - From Small Wetland East Of Route 93, Andover, To Confluence With Meadow Brook, Tewksbury (Includes Intermittent Portion).	Waterbody Map	River	2.1	Miles	Impaired	TMDL needed
Unnamed Tributary	MA84B-01	(Locally Known As Reedy Meadow Brook) Headwaters, Outlet Of Small Unnamed Impoundment Upstream Of Bruce Street, Littleton To Inlet Mill Pond, Littleton.	Waterbody Map	River	1.5	Miles	Impaired	TMDL needed
Vine Brook	MA83-06	Headwaters (Southeast Of Granny Hill) Near Grant Street, Lexington To Confluence With Shawsheen River, Bedford.	Waterbody Map	River	6.8	Miles	Impaired	TMDL completed
Ward Pond	MA84096	Palis Id Changed From 35094 To 84096 On October 10, 1997. (Wbid From Ma35094 To Ma84096) Ashburnham	Waterbody Map	Freshwater Lake	54.0	Acres	Impaired	TMDL needed

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Causes of Impairment for Reporting Year 2010

Massachusetts, Merrimack. Massachusetts, New Hampshire.

Description of this table

Cause of Impairment	Size of Assessed Waters with Listed Causes of Impairment
NOTE: Click on the underlined "Cause of Impairment" value to see a listing of those waters with that cause of impairment.
Cause of Impairment	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)	Bays and Estuaries (Square Miles)
Low Flow Alterations	3.2
Mercury in Water Column	5.8
Non-Native Aquatic Plants		699.9
Physical Substrate Habitat Alterations	27.2
Aquatic Macroinvertebrate Bioassessments	30.1
Chlorophyll-A		42.5
Other Cause	5.8
Secchi Disk Transparency		42.5
Turbidity	31.4	3.0
Chloride	2.1
Excess Algal Growth		43.9
Fecal Coliform	130.3		6.5
pH, Low	4.9
Phosphorus, Total	22.0	42.5
Copper	5.8
Dissolved Oxygen	38.9	666.9
Aquatic Plants (Macrophytes)		448.3
Taste and Odor	4.8
Total Suspended Solids (TSS)	8.4
Debris/Floatables/Trash	15.0
Eurasian Water Milfoil, Myriophyllum Spicatum		77.0
Mercury in Fish Tissue	31.1	3,204.8
PCB(s) in Fish Tissue	18.8		6.3
Sedimentation/Siltation	14.8

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Probable Sources Contributing to Impairments for Reporting Year 2010

Massachusetts, Merrimack. Massachusetts, New Hampshire. Watershed

Description of this table

Probable Source	Size of Assessed Waters with Probable Sources of Impairments
Probable Source	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)	Bays and Estuaries (Square Miles)
Agriculture	2.3
Animal Feeding Operations (Nps)	2.1
Atmospheric Deposition - Toxics	21.0	3,169.5
Channel Erosion/Incision From Upstream Hydromodifications	3.2
Channelization	18.8
Combined Sewer Overflows	46.2		1.8
Discharges From Municipal Separate Storm Sewer Systems (Ms4)	24.2
Golf Courses	2.3
Habitat Modification - Other Than Hydromodification	4.8
Highway/Road/Bridge Runoff (Non-Construction Related)	2.1
Illicit Connections/Hook-Ups To Storm Sewers	9.7
Inappropriate Waste Disposal	9.2
Industrial Point Source Discharge	6.5
Industrial/Commercial Site Stormwater Discharge (Permitted)	7.1
Introduction Of Non-Native Organisms (Accidental Or Intentional)		699.9
Landfills	2.3
Loss Of Riparian Habitat	5.8
Municipal Point Source Discharges	29.4
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	4.0
Source Unknown	106.9	1,005.5	6.5
Unspecified Urban Stormwater	82.2		1.8
Upstream/Downstream Source	18.8