(2004) Total Maximum Daily Load for Algae and Turbidity, North Twin Lake, Calhoun County Iowa, 2004. Natural Resources, Department of
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Abstract
The Federal Clean Water Act requires the Iowa Department of Natural Resources (IDNR) to develop a total maximum daily load (TMDL) for waters that have been identified on the state’s 303(d) list as impaired by a pollutant. North Twin Lake has been identified as impaired by algae and turbidity. The purpose of the TMDL for North Twin Lake is to calculate the maximum allowable nutrient loading for the lake associated with algae and turbidity levels that will meet water quality standards. This document consists of TMDLs for algae and turbidity designed to provide North Twin Lake water quality that fully supports its designated uses. Phosphorus, which is related through the Trophic State Index (TSI) to chlorophyll and Secchi depth, is targeted to address the algae and turbidity impairments.
| Item Type: | Departmental Report |
|---|---|
| Keywords: | TMDL Algae Turbidity North Twin Lake |
| Subjects: | Natural resources and environment > Water resources > Water quality |
| ID Code: | 52399 |
| Deposited By: | Mr Jamie Mootz |
| Deposited On: | 01 Apr 2025 19:05 |
| Last Modified: | 01 Apr 2025 19:05 |
| URI: | https://publications.iowa.gov/id/eprint/52399 |