School: Rock Valley High School
Date: Time: 2/19/01 11:30 A.M.
Water Conditions: frozen over
Weather Conditions: cloudy and cold
Air Temperature: degrees centigrade - 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:
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Test 1
Dissolved Oxygen
DOday1 mg/L 11
% Sat 70
Q-Value 75
Weighing Factor 0.17
Total %12.75
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Test 2
Fecal Coliform
colonies/100mL 0 colonies
Q-Value 99
Weighing factor 0.16
Total % 15.84
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Test 3
pH
units 7.19
Q-Value 92
Weighing factor 0.11
Total % 10.12
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Test 4
BOD
DO 5 days DO Day 1 - 11mg/L - DO day5 7 mg/L
Q-Value 61
Weighing factor 0.11
Total % 6.71
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Test 5
Temperature Change 0 degrees centigrade
Temp (site1) degrees centigrade -.17
Temp (site 2) degrees centigrade -.17
T= degrees centigrade
Q-Value 93
Weighing Factor 0.10
Total % 9.3
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Test 6
Phosphate
mg/L .7
Q-Value 50
Weighing Factor 0.10
Total % 5
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Test 7
Nitrate
mg/L 5
Q-Value 37
Weighilng Factor 0.10
Total % 3.7
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Test 8
Turbidity
meters feet 5 ft.
Q-Value 98
Weighing Factor 0.08
Total % 5.82
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Test 9
Total Solids
mg/L .19
Q-Value 78
Weighting Factor 0.07
Total % 5.46
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OVERALL WATER QUALITY INDEX % 74.7
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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
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