School: Rock Valley Community School in Rock Valley, Iowa
Date: Time: 10/25/99
Water Conditions: Low and Fairly Clear
Weather Conditions: Fair and Breezy
Air Temperature: degrees centigrade 14.7 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: Boat Ramp
Site Location or Address: North Edge of Rock Valley
- - - - - - - - - - - - - - - - - -
Test 1
Dissolved Oxygen
DOday1 mg/L 15
% Sat 115
Q-Value 93
Weighing Factor 0.17
Total % 15.81
- - - - - - - - - - - - - - - - - -
Test 2
Fecal Coliform
colonies/100mL 62
Q-Value 52
Weighing factor 0.16
Total % 8.32
- - - - - - - - - - - - - - - - - -
Test 3
pH
units 7.6
Q-Value 92
Weighing factor 0.11
Total % 10.12
- - - - - - - - - - - - - - - - - -
Test 4
BOD Did not do.
DOdays mg/L DOday1-DOday5 mg/L
Q-Value
Weighing factor 0.11
Total %
Test 5
Temperature Change 2.03 degrees centigrade
Temp (site1) degrees centigrade 5.83
Temp (site 2) degrees centigrade 7.86
T= degrees centigrade
Q-Value 85
Weighing Factor 0.10
Total % 8.5
- - - - - - - - - - - - - - - - -
Test 6
Phosphate
mg/L .1
Q-Value 98
Weighing Factor 0.10
Total % 9.8
- - - - - - - - - - - - - - - - -
Test 7
Nitrate
mg/L 4.4
Q-Value 70
Weighilng Factor 0.10
Total % 7.0
- - - - - - - - - - - - - - - - -
Test 8
Turbidity
meters feet 3 feet
Q-Value 76
Weighing Factor 0.08
Total % 6.0
- - - - - - - - - - - - - - - - -
Test 9
Total Solids
mg/L 250
Q-Value 66
Weighting Factor 0.07
Total % 4.62
- - - - - - - - - - - - - - - - -
OVERALL WATER QUALITY INDEX % 70.17 without BOD Test
************************************************
Overall Water Quality Index Quality of Water
90% - 100% Excellent
70% - 90% Good
50% - 70% Medium
25% - 50% Bad
0% - 25% Very bad