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City of Ames

Water & Pollution Control Department

300 East 5th Street
Building 1
Ames, Iowa 50010

Phone:
(515) 239-5150

FAX:
(515) 239-5251

 

Water and Pollution Control Department

Water Quality Data for July  2010

Information  |  Staff   |  Rates  |  History   Quality   |   Security
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(Taken from the Monthly Operating Report submitted to
the Iowa Department of Natural Resources)
This information is usually updated around the 20th of
the following month.

Wastewater Flow Rates

Influent Flows

 

 

 

Average Day, million gallons per day

7.23

Maximum Day, million gallons per day

9.01

Minimum Day, million gallons per day

5.91

Total Effluent Flow to Skunk River, million gallons

224.16

Equalization Diversion to River, million gallons

 

Average Influent/Effluent Values (mg/L)

Parameter

Influent

Effluent

Effluent Permit Limit

CBOD5

     
 

Monthly Average
Concentration (mg/L)

115

4.0

20

Maximum Weekly Average
Concentration (mg/L)

NA

6

30

Monthly Average
Mass (lb/day)

6,816

242

2,795

Maximum Weekly Average
Mass (lb/day)

NA

304

1,853

Average % Removal

NA

96

>85

TSS

     
 

Monthly Average
Concentration (mg/L)

173

11.0

30

Maximum Weekly Average
Concentration (mg/L)

NA

13

45

Monthly Average
Mass (lb/day)

10,320

681

4,540

Maximum Weekly Average
Mass (lb/day)

NA

734

3,027

Average % Removal

NA

93

>85

NH3

     
 

Monthly Average
Concentration (mg/L)

12.5

0.13

5.7 (Nov-Mar)
2.3 (Apr-Oct)

Maximum Weekly Average
Concentration (mg/L)

NA

0.14

8.6 (Nov-Mar)
3.5 (Apr-Oct)

Monthly Average
Mass (lb/day)

966

7.7

551 (Nov-Mar)
224 (Apr-Oct)

Maximum Weekly Average
Mass (lb/day)

NA

8.3

827 (Nov-Mar)
336 (Apr-Oct)

DO

     
 

Minimum Weekly Average
Concentration (mg/L)

NA

8.2

>6.0 (Mar-Dec)
>5.0 (Jan-Feb)

pH

     
 

Daily Maximum

7.4

8.2

9.0

Daily Minimum

7.0

7.9

6.0

WET

     
 

Pass/Fail*

NA

Not Tested

No Acute Toxicity

* = Whole Effluent Toxicity analysis required once per 12 months.