School: Rock Valley Community School in Rock Valley, Iowa
Date: Time: 4\25\00
Water Conditions: slightly rising fairly clear
Weather Conditions: cloudy and pleasant
Air Temperature: degrees centigrade 15.2degrees 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
- - - - - - - - - - - - - - - - - -
Test 1
Dissolved Oxygen
DOday1 mg/L 14
% Sat 15.3
Q-Value 120
Weighing Factor 0.17
Total % 15.3
- - - - - - - - - - - - - - - - - -
Test 2
Fecal Coliform did positive/negative test, results were positive
colonies/
Q-Value
Weighing factor 0.16
Total %
- - - - - - - - - - - - - - - - - -
Test 3
PH
units 8.4
Q-Value 72
Weighing factor 0.11
Total % 7.92
- - - - - - - - - - - - - - - - - -
Test 4
BOD Did not do.
DOdays mg/L DOday1-DOday5 mg/L
Q-Value
Weighing factor 0.11
Total %
- - - - - - - - - - - - - - - - - -
Test 5
Temperature Change .4 degrees centigrade
Temp (site1) degrees centigrade 13.9
Temp (site 2) degrees centigrade 14.3
T= degrees centigrade
Q-Value 93
Weighing Factor 0.10
Total % 9.3
- - - - - - - - - - - - - - - - -
Test 6
Phosphate
mg/L 5
Q-Value 95
Weighing Factor 0.10
Total % 9.5
- - - - - - - - - - - - - - - - -
Test 7
Nitrate
mg/L 57.2
Q-Value 8
Weighilng Factor 0.10
Total % .8
- - - - - - - - - - - - - - - - -
Test 8
Turbidity
Feet 1.5 feet
Q-Value 64
Weighing Factor 0.08
Total % 5.12
- - - - - - - - - - - - - - - - -
Test 9
Total Solids
mg/L 350
Q-Value 53
Weighting Factor 0.07
Total % 3.71
- - - - - - - - - - - - - - - - -
OVERALL WATER QUALITY INDEX %51.65 without BOD Test and Fecal
Coliform
************************************************
Overall Water Quality Index Quality of Water
90% - 100% Excellent
70% - 90% Good
50% - 70% Medium
25% - 50% Bad
0% - 25% Very bad