LITTLE POTLATCH CREEK, LATAH COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1979
Description:
Little Potlatch Creek (17060306) is a second order tributary to the Potlatch River in north-central Idaho. Beneficial uses were identified as agricultural water supply, contact recreation, anadromous fish habitat, and cold water biota. This study sampled 5 sites during the springs of 1986-1987. The water quality of the stream has been heavily impacted by nonoint sources. Suspended sediments and inorganic nitrogen pose the greatest threat to beneficial uses. Bacterial contamination by livestock, phosphorus, and organic nitrogen loading are of lesser concern, but may lead to the degradation and cultural eutrophication of the stream and its receiving waters, the Potlatch River. The major sediment and nutrient loadings occurred during rains on snow or frozen ground, and with runoff from rains on bare fields in the spring.
Latham, R. 1987. Water Quality Status Report No. 76. Idaho Department of Health and Welfare, Division of Environment, Boise, ID. 44 pp.
Record Details:
Record Type:DOCUMENT
Product Published Date:11/07/1997
Record Last Revised:12/10/2002
Record ID:
5976
Keywords:
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Geographic Areas:
Title
:LITTLE POTLATCH CREEK, LATAH COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1979
Version
:1.0
State
:ID
County
:LATAH
Title
:LITTLE POTLATCH CREEK, LATAH COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1979
Version
:1.0
State
:ID
Quality Assurance:
Title
:LITTLE POTLATCH CREEK, LATAH COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1979
Data Use & Constraints
:A comparison of the mean percent recoveries for the 1986 survey and a previous survey, as presented in Bauers Pilot Study of Quality Assurance, shows less than a 3% difference between the respective values for suspended sediment, total phosphorus, and nitrite and nitrate. TKN recoveries had the greatest downward shift of 13.1%. The average relative range for total ammonia indicates an ongoing problem with replicating results. Precision estimates for the other parameters had relative ranges of 5.2% for total phosphorus, 10.2% for orthophosphate, 6.2% for nitrite and nitrate, and 1.6% for TKN. A slight decrease in precision was experienced with the suspended sediments.