School: Cedar Valley Christian School
Date: November 9, 1999 Time: 10:30 am
Water Conditions: greenish, cold, 11 degrees Celsius
Weather Conditions: sunny, clear, warm
Air Temperature: 24 degrees Celsius
Flow rate: less than 0.3 meters/second
River/Stream: Indian Creek
River Mile Marker: N/A
Location: 2 miles N of County Home Road, Marion
Latitude: 42 deg., 6.963 min.
Longitude: 91 deg., 34.031 min.
Site: Birmingham farm
Site Location or Address: 3514 Coffey Ln., Marion IA
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Test 1
Dissolved Oxygen
DOday1 10.3 mg/L
93% Sat
Q-Value 98
Weighing Factor 0.17
Total 16.66%
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Test 2
Fecal Coliform
10100 colonies/100mL
Q-Value 10
Weighing factor 0.16
Total 1.6%
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Test 3
pH 8
Q-Value 84
Weighing factor 0.11
Total 9.24%
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Test 4
BOD
(DOday1) 10.3 - (DOday5) 8.6
= 1.7 mg/L
Q-Value 81
Weighing factor 0.11
Total 8.91%
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Test 5
Temperature Change
Temp (site 1) 11 degrees Celsius
Temp (site 2) 11
degrees Celsius
D T = 0 degrees Celsius
Q-Value 93
Weighing Factor 0.10
Total 9.3%
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Test 6
Phosphate
0.78 mg/L
Q-Value 48
Weighing Factor 0.10
Total 4.8%
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Test 7
Nitrate
2.3 mg/L
Q-Value 93
Weighing Factor 0.10
Total 9.3%
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Test 8
Turbidity
11.6 NTU
Q-Value 74
Weighing Factor 0.08
Total 5.92%
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Test 9
Total Solids
0.34 mg/L
Q-Value 80
Weighing Factor 0.07
Total 5.6%
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OVERALL WATER
QUALITY INDEX
71.33% Good
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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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