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State: Massachusetts
Waterbody ID: MA73-04
Location: Milton Lower Falls Dam, Milton/Boston to mouth at Dorchester Bay, Boston/Quincy.
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .661293
Units: square miles
Watershed Name: Charles
On This Page
- Water Quality Assessment Status
- Causes of Impairment
- Probable Sources Contributing to Impairments
- TMDLs That Apply to This Waterbody
- Previous Causes of Impairment Now Attaining All Uses
State: Massachusetts
Waterbody ID: MA73-04
Location: Milton Lower Falls Dam, Milton/Boston to mouth at Dorchester Bay, Boston/Quincy.
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .661293
Units: square miles
Watershed Name: Charles
Data are also available for these years: 2006 2004 2002 1998
2010 Waterbody Report for Neponset River
Click on the waterbody for an interactive map
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Water Quality Assessment Status for Reporting Year 2010
The overall status of this waterbody is Impaired.
Description of this table
| Designated Use | Designated Use Group | Status |
|---|---|---|
| Aesthetic | Aesthetic Value | Impaired |
| Fish Consumption | Aquatic Life Harvesting | Impaired |
| Fish, Other Aquatic Life And Wildlife | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Primary Contact Recreation | Recreation | Impaired |
| Secondary Contact Recreation | Recreation | Impaired |
| Shellfish Harvesting | Aquatic Life Harvesting | Impaired |
Causes of Impairment for Reporting Year 2010
Description of this table
| Cause of Impairment | Cause of Impairment Group | Designated Use(s) | State TMDL Development Status |
|---|---|---|---|
| Debris/Floatables/Trash | Trash | Aesthetic | Non-pollutant impairment |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | Fish, Other Aquatic Life And Wildlife | TMDL needed |
| Fecal Coliform | Pathogens | Primary Contact Recreation, Secondary Contact Recreation, Shellfish Harvesting | TMDL completed |
| Other Cause | Other Cause | Fish Consumption | TMDL needed |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | Fish Consumption | TMDL needed |
| Turbidity | Turbidity | Aesthetic | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2010
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Combined Sewer Overflows | Municipal Discharges/Sewage | Dissolved Oxygen; Fecal Coliform; Turbidity |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | Dissolved Oxygen; Fecal Coliform; Turbidity |
| Source Unknown | Unknown | Other Cause; PCB(s) in Fish Tissue |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | Debris/Floatables/Trash; Dissolved Oxygen; Fecal Coliform; Turbidity |
TMDLs That Apply to this waterbody
Description of this table
| TMDL Document Name | TMDL Date | TMDL Pollutant Description | TMDL Pollutant Source Type | Cause(s) of Impairment Addressed |
|---|---|---|---|---|
| Neponset River | Jun-21-2002 | Fecal Coliform | Nonpoint Source | Fecal Coliform; Pathogens |
Previous Causes of Impairments Now Attaining All Uses
No causes of impairment are recorded as attaining all uses for this waterbody.