Water Quality Index - Iowa River, Belle Plaine, Iowa, 4-23-98

School: Belle Plaine High School
Date: Time: 4-23-98 11:00 a.m.
Water Conditions: cold, muddy
Weather Conditions: sunny, warm
Air Temperature: degrees centigrade 15.5 Flow rate: meters/second 1.5
River/Stream: Iowa River
River Mile Marker:
Location: South of Belle Plaine at the Highway 21 Bridge Latitude deg. min.sec. 41.8952675
Longitude deg. min. sec. -92.2773285
Site:
Site Location or Address:

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Test 1
Dissolved Oxygen
DOday1 mg/L 6
% Sat 55
Q-Value 45
Weighing Factor 0.17
Total % 7.65
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Test 2
Fecal Coliform
colonies/100mL 589
Q-Value 30
Weighing factor 0.16
Total % 4.8
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Test 3
pH
units 7
Q-Value 99
Weighing factor 0.11
Total % 10.89
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Test 4
BOD
DOdays mg/L DOday1-DOday5 mg/L : 6 mg/L - 6 mg/L Q-Value 0
Weighing factor 0.11
Total % 0

Test 5
Temperature Change
Temp (site1) degrees centigrade 11
Temp (site 2) degrees centigrade 12
T= degrees centigrade 1
Q-Value 92
Weighing Factor 0.10
Total % 92
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Test 6
Phosphate
mg/L .1
Q-Value 100
Weighing Factor 0.10
Total % 10
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Test 7
Nitrate
mg/L 10
Q-Value 51
Weighilng Factor 0.10
Total % 5.1
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Test 8
Turbidity
meters feet 1/2 feet
Q-Value 56
Weighing Factor 0.08
Total % 44
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Test 9
Total Solids
mg/L 70 mg/L
Q-Value 87
Weighilng Factor 0.07
Total % 6.09
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OVERALL WATER QUALITY INDEX % 58.21

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