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State: New Hampshire
Waterbody ID: NHIMP700020203-01
Location: 010700020203, Knowles Pond - Tr Williams Brook, Imp# 180.02, 55 Acres, 11 Feet High, Cls-A
State Waterbody Type: Impoundment
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 55
Units: acres
Watershed Name: Merrimack
On This Page
- Causes of Impairment
- TMDLs That Apply to This Waterbody
- Previous Causes of Impairment Now Attaining All Uses
State: New Hampshire
Waterbody ID: NHIMP700020203-01
Location: 010700020203, Knowles Pond - Tr Williams Brook, Imp# 180.02, 55 Acres, 11 Feet High, Cls-A
State Waterbody Type: Impoundment
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 55
Units: acres
Watershed Name: Merrimack
2010 Waterbody Report for Knowles Pond - Tr Williams Brook
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
Causes of Impairment for Reporting Year 2010
Description of this table
| Cause of Impairment | Cause of Impairment Group | State TMDL Development Status |
|---|---|---|
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | TMDL needed |
| Dissolved Oxygen Saturation | Organic Enrichment/Oxygen Depletion | TMDL needed |
| Mercury | Mercury | TMDL completed |
| pH | pH/Acidity/Caustic Conditions | TMDL completed |
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 |
|---|---|---|---|---|
| Knowles Pond | Sep-24-2004 | 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.