School: Rock Valley High School
Date: Time: 3/20/01 11:30 A.M.
Water Conditions: Much open water and rising water due to snow
melt
Weather Conditions: Partly Cloudy and Warmer
Air Temperature: degrees centigrade 8.3
Flow rate: meters/second
River/Stream: Rock River
River Mile Marker:
Location: Rock Valley IA
Latitude deg. min. sec.
Longitude deg. min. sec.
Site: Van Zee's Block and Tile
Site Location or Address:
- - - - - - - - - - - - - - - - - -
Test 1
Dissolved Oxygen
DOday1 mg/L 6
% Sat 35
Q-Value 18
Weighing Factor 0.17
Total %3.06
- - - - - - - - - - - - - - - - - -
Test 2
Fecal Coliform
colonies/100mL 100 colonies
Q-Value 44
Weighing factor 0.16
Total % 7.04
- - - - - - - - - - - - - - - - - -
Test 3
pH
units 7.21
Q-Value 92
Weighing factor 0.11
Total % 10.12
- - - - - - - - - - - - - - - - - -
Test 4
BOD
DO 5 days DO Day 1 - 6mg/L - DO day5 1 mg/L
Q-Value 55
Weighing factor 0.11
Total % 6.05
- - - - - - - - - - - - - - - - - -
Test 5
Temperature Change -.33 degrees centigrade
Temp (site1) degrees centigrade .56
Temp (site 2) degrees centigrade .23
T= degrees centigrade
Q-Value 91
Weighing Factor 0.10
Total % 9.1
- - - - - - - - - - - - - - - - -
Test 6
Phosphate
mg/L .86
Q-Value 43
Weighing Factor 0.10
Total % 4.3
- - - - - - - - - - - - - - - - -
Test 7
Nitrate
mg/L 17.6
Q-Value 41
Weighilng Factor 0.10
Total % 4.1
- - - - - - - - - - - - - - - - -
Test 8
Turbidity
meters feet 6"
Q-Value 38
Weighing Factor 0.08
Total % 3.04
- - - - - - - - - - - - - - - - -
Test 9
Total Solids
mg/L 1.64
Q-Value 83
Weighting Factor 0.07
Total % 5.81
- - - - - - - - - - - - - - - - -
OVERALL WATER QUALITY INDEX % 52.62
************************************************
Overall Water Quality Index Quality of Water
90% - 100% Excellent
70% - 90% Good
50% - 70% Medium
25% - 50% Bad
0% - 25% Very bad
Return to Water Quality Data page