Mariposa Lake IA 03-NSK-867
Jasper County S32T81NR18W 6 mi. NE of Newton.
Assessment Comments
Assessment is based on results of water quality monitoring and surveys by IDNR Fisheries Bureau.
Basis for Assessment
SUMMARY: The Class A (primary contact recreation) uses were considered "not assessed." The Class B(LW) aquatic life uses were assessed as "partially supported." Fish consumption uses were "not assessed." EXPLANATION: The Class A uses were considered "not assessed" due to lack of information on levels of indicator bacteria at this lake. Based on the recommendation of the DNR Fisheries Bureau, the Class B(LW) uses remained assessed as "partially supported." The water quality trend for this lake was changed from "declining" to "stable." According to the DNR Fisheries Bureau, this lake experienced severe blooms of algae in 1999. The fish consumption use remain "not assessed" due to lack of fish tissue monitoring at this lake.
Assessment Key Dates
Methods
| 340 | Primary producer surveys (phytoplankton/periphyton/macrophyton) |
| 120 | Surveys of fish and game biologists/other professionals |
| 222 | Non-fixed-station monitoring (conventional during key seasons and flows) |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 2 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Algal Grwth/Chlorophyll a | Overall Use Support | Moderate |
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| Algal Grwth/Chlorophyll a | Aquatic Life Support | Moderate |
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| Algal Grwth/Chlorophyll a | Primary Contact Recreation | Moderate |
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| Siltation | Overall Use Support | Moderate |
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| Siltation | Aquatic Life Support | Moderate |
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| Nutrients | Overall Use Support | Slight |
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| Nutrients | Aquatic Life Support | Slight |
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| Nutrients | Primary Contact Recreation | Slight |
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