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Sanitary Services
Division

 

Home
 

History
 

Collection
 

Infiltration and Inflow
 

Industrial
Pretreatment
 

Southwest Treatment Plant

 

Northwest Treatment Plant
 

•Treatment
 

Statistics

 

•Charts
 

•Improvements
 

Phosphorus
 

Biosolids

icon, green arrow Northwest Wastewater Treatment Plant Statistics

 

Design Criteria
 

Max. Month Average Daily

Wet Weather
Peak Daily

FLOW

9.5 mgd

17 MGD

BOD

19,015 lbs/day

34,027 lbs/day

SS

19,,015 lbs/day

34,027 lbs/day

NH3

1,268 lbs/day

2,268 lbs/day

mgd=Million Gallons per Day
BOD=Biochemical Oxygen Demand
SS=Suspended Solids
NH3=Ammonia Nitrogen

Effluent Requirements

BOD

<20 mg/l

SS

<20 mg/l

NH3

<2 mg/l

pH

6-9

Fecal Coliform

<400/100 ml

Chlorine

NONE

DO

>6 mg/l

DO=Dissolved Oxygen

Average Effluent Water Quality for 2004 through 2007

BOD

<3 mg/l

SS

<2 mg/l

NH3

<.5 mg/l

pH

7.10

Fecal Coliform

<10/100 ml

Whole Effluent
Toxicity Test

Passed

DO

8-10 mg/l

 

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