School: Rock Valley Community School in Rock Valley, Iowa
Date: Time: 2/3/00
Water Conditions: ice on surface with clear water
Weather Conditions: sunny, windy and mild
Air Temperature: degrees centigrade 3.0 degrees centrigrade
Flow rate: meters/second
River/Stream: Rock River
River Mile Marker:
Location: Rock Valley, Iowa
Latitude deg. min. sec.
Longitude deg. min. sec.
Site: Van Zees
Site Location or Address: West Side of Rock Valley
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Test 1
Dissolved Oxygen
DOday1 mg/L 7
% Sat 55
Q-Value 50
Weighing Factor 0.17
Total % 8.5
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Test 2
Fecal Coliform did not do
colonies/
Q-Value
Weighing factor 0.16
Total %
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Test 3
PH
units 7.6
Q-Value 92
Weighing factor 0.11
Total % 10.12
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Test 4
BOD Did not do.
DOdays mg/L DOday1-DOday5 mg/L
Q-Value
Weighing factor 0.11
Total %
Test 5
Temperature Change 1 degrees centigrade
Temp (site1) degrees centigrade 0.3
Temp (site 2) degrees centigrade 1.3
T= degrees centigrade
Q-Value 91
Weighing Factor 0.10
Total % 9.1
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Test 6
Phosphate
mg/L .14
Q-Value 96
Weighing Factor 0.10
Total % 9.6
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Test 7
Nitrate
mg/L 11.6
Q-Value 49
Weighilng Factor 0.10
Total % 4.9
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Test 8
Turbidity
meters feet 5 feet
Q-Value 97
Weighing Factor 0.08
Total % 7.76
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Test 9
Total Solids
mg/L 200
Q-Value 72
Weighting Factor 0.07
Total % 5.04
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OVERALL WATER QUALITY INDEX %55.02 without BOD Test and Fecal
Coliform
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Overall Water Quality Index Quality of Water
90% - 100% Excellent
70% - 90% Good
50% - 70% Medium
25% - 50% Bad
0% - 25% Very bad