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State: Minnesota
Waterbody ID: MN27-0042-01
Location: Hennepin County, at Crystal, MN
State Waterbody Type: Freshwater Lake
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 116
Units: acres
Watershed Name: Twin Cities
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: Minnesota
Waterbody ID: MN27-0042-01
Location: Hennepin County, at Crystal, MN
State Waterbody Type: Freshwater Lake
EPA Waterbody Type: Lakes, Reservoirs, and Ponds
Water Size: 116
Units: acres
Watershed Name: Twin Cities
2008 Waterbody Report for Upper Twin
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 |
|---|---|---|
| Class 2b Aquatic Recreation | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Class 2b Warm Water Aquatic Consumption | Aquatic Life Harvesting | Impaired |
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 |
|---|---|---|---|
| Mercury in Fish Tissue | Mercury | Class 2b Warm Water Aquatic Consumption | TMDL completed |
| Nutrient/Eutrophication Biological Indicators | Nutrients | Class 2b Aquatic Recreation | TMDL completed |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | Class 2b Warm Water Aquatic Consumption | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2008
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | Mercury in Fish Tissue |
| Non-Point Source | Unspecified Nonpoint Source | Nutrient/Eutrophication Biological Indicators |
| Urban Runoff/Storm Sewers | Urban-Related Runoff/Stormwater | Nutrient/Eutrophication Biological Indicators |
| Yard Maintenance | Urban-Related Runoff/Stormwater | Nutrient/Eutrophication Biological Indicators |
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 |
|---|---|---|---|---|
| North Twin Lake (27-0042-01) | Nov-09-2007 | Phosphorus | Point/Nonpoint Source | Nutrients |
Previous Causes of Impairments Now Attaining All Uses
No causes of impairment are recorded as attaining all uses for this waterbody.