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State: New Hampshire
Waterbody ID: NHEST600031001-05
Location: 010600031001, BACK CHANNEL, PROHIBITED/SAFETY ZONE, CLOSED, 421.64, ACRES
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .649103
Units: square miles
Watershed Name: Piscataqua-Salmon Falls
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: New Hampshire
Waterbody ID: NHEST600031001-05
Location: 010600031001, BACK CHANNEL, PROHIBITED/SAFETY ZONE, CLOSED, 421.64, ACRES
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .649103
Units: square miles
Watershed Name: Piscataqua-Salmon Falls
Data are also available for these years: 2008 2006 2004 2002
2010 Waterbody Report for BACK CHANNEL
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 |
|---|---|---|
| Aquatic Life | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Drinking Water Supply | Public Water Supply | Good |
| Fish Consumption | Aquatic Life Harvesting | Impaired |
| Primary Contact Recreation | Recreation | Good |
| Secondary Contact Recreation | Recreation | Good |
| Shellfish Consumption | Aquatic Life Harvesting | Impaired |
| Wildlife | Fish, Shellfish, And Wildlife Protection And Propagation | Not Assessed |
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 |
|---|---|---|---|
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | Shellfish Consumption | TMDL needed |
| Estuarine Bioassessments | Cause Unknown - Impaired Biota | Aquatic Life | TMDL needed |
| Light Attenuation Coefficient | Turbidity | Aquatic Life | TMDL needed |
| Mercury | Mercury | Fish Consumption, Shellfish Consumption | TMDL needed |
| Nitrogen, Total | Nutrients | Aquatic Life | TMDL needed |
| Polychlorinated Biphenyls (PCBs) | Polychlorinated Biphenyls (PCBs) | Shellfish Consumption, Fish Consumption | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2010
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | Mercury |
| Source Unknown | Unknown | Dioxin (Including 2,3,7,8-TCDD); Estuarine Bioassessments; Light Attenuation Coefficient; Mercury; Nitrogen, Total; Polychlorinated Biphenyls (PCBs) |
TMDLs That Apply to this waterbody
No TMDL data have been recorded by EPA for this waterbody.
Previous Causes of Impairments Now Attaining All Uses
Description of this table
| Cause of Impairment | Cycles Listed | WQS Attainment Date | WQS Attainment Reason | WQS Attainment Comments |
|---|---|---|---|---|
| Enterococcus Bacteria | 2002, 2004, 2006 | Sep-30-2009 | Applicable WQS attained; reason for recovery unspecified. | |
| Enterococcus Bacteria | 2002, 2004, 2006 | Sep-30-2009 | Applicable WQS attained; reason for recovery unspecified. | |
| Enterococcus Bacteria | 2002, 2004, 2006 | Sep-30-2009 | Applicable WQS attained; reason for recovery unspecified. |