School: Rock Valley Community School in Rock Valley, Iowa
Date: Time: 5/8/00
Water Conditions: low fairly clear
Weather Conditions: cloudy, pleasant, and windy
Air Temperature: degrees centigrade 16 degrees celcius
Flow rate: meters/second
River/Stream: Rock River
River Mile Marker:
Location: Rock Valley, Iowa
Latitude deg. min. sec.
Longitude deg. min. sec.
Site: boat ramp
Site Location or Address: north Side of Rock Valley
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Test 1
Dissolved Oxygen
DOday1 mg/L 12
% Sat 110
Q-Value 95
Weighing Factor 0.17
Total % 16.15
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Test 2
Fecal Coliform did positive/negative test, results were positive
colonies/
Q-Value
Weighing factor 0.16
Total %
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Test 3
PH
units 8.7
Q-Value 56
Weighing factor 0.11
Total % 6.16
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Test 4
BOD Did not do.
DOdays mg/L DOday1-DOday5 mg/L
Q-Value
Weighing factor 0.11
Total %
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Test 5
Temperature Change -.3 degrees centigrade
Temp (site1) degrees centigrade 17.7
Temp (site 2) degrees centigrade 17.4
T= degrees centigrade
Q-Value 91
Weighing Factor 0.10
Total % 9.1
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Test 6
Phosphate
mg/L .16
Q-Value 95
Weighing Factor 0.10
Total % 9.5
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Test 7
Nitrate
mg/L 13.2
Q-Value 49
Weighilng Factor 0.10
Total % 4.9
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Test 8
Turbidity
Feet 1.5 feet
Q-Value 64
Weighing Factor 0.08
Total % 5.12
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Test 9
Total Solids
mg/L 350
Q-Value 53
Weighting Factor 0.07
Total % 3.71
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OVERALL WATER QUALITY INDEX %54.64 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