Morris Lake IA 04-LDM-1071
Lucas County S26T72NR21W approx 3 mi E of Chariton.
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
1996
Result Period
1992 - 1994
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 04-LDM-02294-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Not assessed
Fish Consumption
Not assessed
Drinking Water
Threatened
Documentation
Assessment Comments
Assessment is based on results of lake monitoring.
Basis for Assessment
Used results of sampling for eight common agricultural herbicides at the lake inlet and near the dam on January 30, 1995, as part of a study of 19 Iowa water supply reservoirs (Miller and Kennedy 1995) to assess support of the Class C (drinking water) uses as FST due to (1) detection of atrazine at levels (0.57 and to 0.67 ug/l, dam and inlet) at less than the average reportable concentration for the 19 lakes sampled (0.84 ug/l), (2) detection of cyanazine at levels (0.46 and 0.58 ug/l, dam and inlet) at about one-half the average reportable concentration (1.03 ug/l), and (3) no levels above the MCL for atrazine.
Monitoring and Methods
Assessment Key Dates
| 1/30/1995 | One-time Chemical Monitoring |
Methods
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |