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State: New Hampshire
Waterbody ID: NHLAK700060402-03
Location: 010700060402, HALFMOON LAKE, ALTON, WARM Water Fishery, 102.3891HA
State Waterbody Type: Freshwater Lake
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 253
Units: acres
Watershed Name: Merrimack. Massachusetts, New Hampshire.
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: NHLAK700060402-03
Location: 010700060402, HALFMOON LAKE, ALTON, WARM Water Fishery, 102.3891HA
State Waterbody Type: Freshwater Lake
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 253
Units: acres
Watershed Name: Merrimack. Massachusetts, New Hampshire.
Data are also available for these years: 2010 2006 2004 2002
2008 Waterbody Report for HALFMOON LAKE, ALTON, WWF
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 2008
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 After Adequate Treatment | Public Water Supply | Good |
| Fish Consumption | Aquatic Life Harvesting | Impaired |
| Primary Contact Recreation | Recreation | Impaired |
| Secondary Contact Recreation | Recreation | Good |
| Wildlife | Fish, Shellfish, And Wildlife Protection And Propagation | Not Assessed |
Causes of Impairment for Reporting Year 2008
Description of this table
| Cause of Impairment | Cause of Impairment Group | Designated Use(s) | State TMDL Development Status |
|---|---|---|---|
| Cyanobacteria Hepatotoxic Microcystins | Biotoxins | Primary Contact Recreation | TMDL needed |
| Dissolved Oxygen Saturation | Organic Enrichment/Oxygen Depletion | Aquatic Life | TMDL needed |
| Mercury | Mercury | Fish Consumption | TMDL completed |
| Non-Native Aquatic Plants | Nuisance Exotic Species | Aquatic Life | Non-pollutant impairment |
| pH | pH/Acidity/Caustic Conditions | Aquatic Life | TMDL completed |
Probable Sources Contributing to Impairment for Reporting Year 2008
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Atmospheric Deposition - Acidity | Atmospheric Deposition | pH |
| Atmospheric Deposition - Toxics | Atmospheric Deposition | Mercury |
| Source Unknown | Unknown | Cyanobacteria Hepatotoxic Microcystins; Dissolved Oxygen Saturation; Non-Native Aquatic Plants |
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 |
|---|---|---|---|---|
| 158 Acid Ponds | Sep-20-2007 | pH | Nonpoint Source | pH |
| Ne Regional Mercury Tmdl | Dec-20-2007 | Mercury | Nonpoint Source | Mercury |
Previous Causes of Impairments Now Attaining All Uses
No causes of impairment are recorded as attaining all uses for this waterbody.