Fairfield Reservoir 1 IA 03-SKU-909

Alternate name(s) for this segment: Bonnifield Lake | Fairfield Municipal Reservoir 1

Jefferson County S13&24T72NR10W near Fairfield

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

1994

Result Period

1990 - 1992

Designations

Assessment Type

Monitored

Integrated Report

Category 0

Trophic

Eutrophic

Trend

Stable

Legacy ADBCode

IA 03-SKU-00950-L_0

Overall Use Support

Threatened

Aquatic Life Use Support

Not assessed

Fish Consumption

Not assessed

Drinking Water

Threatened

Documentation

Assessment Comments

Basis for Assessment

Reservoir was sampled at upper end on March 30, 1993, for 7 ag herbicides in water and sediment. Levels of atrazine (0.79 ug/l) and cyanazine (0.77 ug/l) were detected in water; no pesticides were detected in sediment. Compared to the other 14 reservoirs, levels of atrazine were relatively high. Additional study is needed to determine levels of herbicides during summer. Based on info for Corydon Reservoir (Kalkhoff 1993), the relatively high level of atrazine in winter at Fairfield Res (1) suggests the possiblity of levels > MCL during summer. However, levels in water were < 1/2 MCL; thus assess as FST. More monitoring is needed.