0442-920100 info@wasaokara.gop.pk

Sewerage System

Sewerage System

Efficient Sewerage Management

The system of sewers in Okara started establishing since the city's early development, and multiple phases of the scheme have been constructed and operated since then. WASA Okara is committed to providing an efficient and environmentally responsible sewerage system.

Sewerage System

Our Sewerage Infrastructure

WASA Okara manages a comprehensive sewerage network that collects and treats wastewater from residential, commercial, and industrial areas. Our infrastructure includes:

Collection Network
  • 450+ km of sewer lines
  • 25,000+ manholes
  • 12 main trunk sewers
  • Regular maintenance program
Pumping Stations
  • 18 sewage pumping stations
  • Modern pumping equipment
  • 24/7 monitoring systems
  • Emergency backup power
Treatment Plants
  • 3 sewage treatment plants
  • Combined capacity of 35 MGD
  • Advanced treatment processes
  • Environmental compliance
Maintenance Fleet
  • 15 jetting machines
  • 8 suction units
  • 5 desilting machines
  • Specialized maintenance tools

Sewage Treatment Process

Our sewage treatment plants employ a multi-stage process to treat wastewater before it is safely discharged into the environment:

Preliminary Treatment

The first stage of treatment involves removing large objects and grit from the wastewater:

  • Screening to remove large debris like plastic, paper, and rags
  • Grit chambers to remove sand, gravel, and other heavy materials
  • Flow equalization to manage varying inflow rates

This stage protects downstream equipment and improves the efficiency of subsequent treatment processes.

Primary Treatment

Primary treatment involves physical processes to remove suspended solids:

  • Primary sedimentation tanks where solids settle to the bottom
  • Removal of floating materials like oil and grease
  • Typically removes 50-60% of suspended solids and 30-40% of BOD

The settled solids, known as primary sludge, are collected for further treatment, while the liquid portion moves to secondary treatment.

Secondary Treatment

Secondary treatment uses biological processes to remove dissolved organic matter:

  • Activated sludge process with microorganisms to consume organic matter
  • Aeration tanks where oxygen is supplied to support biological activity
  • Secondary clarifiers to separate treated water from biological solids

This stage typically removes 85-95% of the original BOD and suspended solids from the wastewater.

Tertiary Treatment

Advanced treatment to further improve water quality:

  • Filtration through sand or membrane filters
  • Nutrient removal (nitrogen and phosphorus)
  • Advanced oxidation processes for persistent contaminants

Tertiary treatment is applied at our newer facilities and is being gradually implemented across all treatment plants to meet stricter environmental standards.

Disinfection

Disinfection eliminates harmful pathogens before discharge:

  • Chlorination to kill bacteria, viruses, and other microorganisms
  • UV disinfection at newer facilities as an environmentally friendly alternative
  • Dechlorination where necessary to remove residual chlorine

After disinfection, the treated water meets regulatory standards and is safe for discharge into receiving water bodies.

Sludge Treatment

Treatment of solids removed during the wastewater treatment process:

  • Thickening to reduce water content
  • Digestion (aerobic or anaerobic) to stabilize organic matter
  • Dewatering to further reduce volume
  • Beneficial reuse as fertilizer or soil conditioner where possible

Our sludge management practices focus on environmental sustainability and resource recovery.

Environmental Compliance

Environmental Compliance

At WASA Okara, we are committed to protecting the environment through responsible wastewater management. Our environmental compliance program includes:

We strictly adhere to all national and provincial environmental regulations governing wastewater treatment and discharge. Our facilities are regularly inspected by environmental authorities to ensure compliance.

We conduct comprehensive monitoring of treated wastewater to ensure it meets or exceeds discharge standards. Our laboratory performs regular testing for parameters such as BOD, COD, suspended solids, nutrients, and pathogens.

We implement various odor control measures at our facilities, including covered processes, biofilters, and chemical scrubbers to minimize odor impacts on surrounding communities.

We are implementing energy-efficient technologies and practices across our facilities to reduce our carbon footprint. This includes energy-efficient pumps, motors, and aeration systems, as well as exploring renewable energy options.

We are exploring opportunities for resource recovery from wastewater, including biogas generation from anaerobic digestion, nutrient recovery for fertilizer production, and water reuse for non-potable applications.

New Sewerage Connection Process

How to Apply for a New Connection

  1. Download and Fill Application Form
    Download the application form from our website or collect it from our office.
  2. Submit Required Documents
    Submit the completed form along with property documents, ID proof, and other required documents.
  3. Pay Application Fee
    Pay the application processing fee at our office or through online payment.
  4. Site Inspection
    Our technical team will visit your property to assess feasibility and requirements.
  5. Approval and Payment
    Upon approval, pay the connection charges as per the category of your property.
  6. Connection Installation
    Our team will install the connection within 7-10 working days after payment.
Download Connection Form

Connection Charges

Property Type Connection Size Charges (PKR)
Residential (Small) 4 inch 20,000
Residential (Medium) 6 inch 30,000
Residential (Large) 8 inch 45,000
Commercial (Small) 4 inch 35,000
Commercial (Medium) 6 inch 55,000
Commercial (Large) 8 inch 85,000
Industrial 8-12 inch Contact for Quote
Additional charges may apply based on distance from main line, road cutting permissions, and special requirements.

Responsible Disposal Tips

Help us maintain an efficient sewerage system by following these responsible disposal practices:

Never Flush These Items

  • Wet wipes (even if labeled "flushable")
  • Sanitary products
  • Cotton buds/swabs
  • Diapers
  • Dental floss
  • Medications
  • Cooking oil or grease
  • Paint or chemicals

Kitchen Practices

  • Collect cooking oil in containers for proper disposal
  • Wipe greasy pans with paper towels before washing
  • Use sink strainers to catch food particles
  • Compost food waste instead of using garbage disposal
  • Dispose of coffee grounds in trash or compost
  • Never pour sauces, dairy products, or fats down the drain

Proper Disposal Methods

  • Use designated collection points for hazardous waste
  • Return unused medications to pharmacies
  • Dispose of solid waste in trash bins
  • Use recycling facilities for appropriate materials
  • Contact WASA for guidance on disposing of unusual waste
  • Report illegal dumping into sewers or drains

Having Issues with Sewerage System?

If you're experiencing issues such as blockages, overflows, or odors, please contact our customer service department immediately.

Helpline: +92-XXX-XXXXXXX

Email: sewerage@wasaokara.gop.pk

Report an Issue