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Operations & Maintenance
Water Leak Map 
Specialized in maintaining GWA’s standards for quality and service. Select a team or unit below to learn about their role at GWA.

GWA Operations Department

Under the direction of the Assistant General Manager for Operations, Water Operations and Maintenance is composed of Utility Services Division Operations, Water Distribution, Water Production, Wastewater Collections and Wastewater Treatment. The Operations Department provides water and wastewater services in a safe, reliable, responsible and cost effective manner.

  • Utility Services Division OperationsOpen or Close
    The Utility Services Division Operations delivers service through dispatch, meter maintenance, asset management, and meter reading and acts as the centralized administrative support for water and wastewater.

    Administrative Support Unit

    Responsible for the tracking divisional budget balances and expenses, processing and posting of JDE Work Orders and daily well status reports, employee time keeping, payroll and performance evaluations, Inter-office communication and coordination with Private Management Contractor on wastewater and water personnel related issues. Creating, routing and maintaining records of memos and correspondences, and advising assigned employees of HR policies and procedures. This office serves to support Water and Wastewater Operations Department by delivering service both internally and externally on all procurement needs and capital improvement project support in areas of work order management and job costing to create an atmosphere of accountability.

    Dispatch Office

    Receive customer phone inquiries, complaints, water and wastewater emergency reports of outages and provide information to the public regarding the status of operations and services.

    Meter Maintenance

    Responsible for meter testing and maintenance to avoid revenue loss from under-registration of meters.

    Asset Management

    Responsible in the preventive maintenance of GWA’s over a thousand water and wastewater assets.

    Meter Reading Unit

    The Meter Reading Unit read over 41,000 water meters both electronically and manually. GWA currently operates two AMR read systems (Metron Farnier & Badger Read Center). Meter Readers also manually read all Sensus meters as well as report various water related incidents such as service line leakages, meter leaks, valve leaks, flooded meter sites, illegal connections, etc. Currently, this team does double duty by reading meters and assisting the Small Meter Task Force to change out meters.

  • Water DistributionOpen or Close
    Anthony Chargualaf
    Operations & Maintenance Manager 
    Phone300-6342
    Email apcharg@guamwaterworks.org
    GWA Water Distribution supplies each customer with a sufficient volume of water at adequate pressure and that it delivers safe water that satisfies the quality expectations of 41,000 customers.

    Pressure Line Unit

    Pressure Line Unit performs repair on water mains and service line leaks, replacement and maintenance of main and service lines, control valves, pressure regulating valves and fire hydrants This unit is currently assisting in the meter installation project to address meter failures as mandated by 2011 Court Order. This meter installation team is composed of Small Meter Task Force to change out ¾ meters and Large Meter Task Force to address large meter failures for meters 1” and above. This meter task force team will be dissolved with the completion of the islandwide meter change outs. Pressure Line Unit is also managing Gravity Section, who is responsible for managing sewer network with over 275 miles of gravity. Work includes water jetting of sewer lines to perform CCTV inspections of 55 unique miles per year and Hot Spot flushing in accordance with the current stipulated order requirements.

    GIAA

    Guam Waterworks Authority operates GIAA’s entire water system. The specific areas included are the well and transmission lines, the granular activated carbon (GAC) filter system, the reservoir, the chlorination system, the booster pump and fire pumps and the distribution system.

    Ugum

    The Ugum WTP is the primary sources of drinking water for the Southern Public Water System and the only surface water treatment plant owned and operated by GWA. Ugum provides approximately 2.5 MGD to 3.2MGD to the southern residences of Guam.

    Booster Stations

    To maintain adequate pressure and deliver adequate flow to satisfy customer demands.

    Operations Department – Water Production

    Water Treatment/Production Unit is responsible for the maintenance and replacement of wells civil, mechanical and hydraulic systems components, the well vulnerability assessment and action program, well head protection program, and grounds maintenance and security at all wells, operating or not.

    Deepwell

    The Deep Well and Disinfection section of the Production Division is responsible for the extraction of Guam’s groundwater sources, ensuring that it meets established environmental quality standards, to meet daily consumption demand of our water customers. This is accomplished through professional, reliable, and certified operators of Guam Waterworks Authority.

    Electrical

    This section is in charge of trouble shooting, repair and installation of pumps, motor and control at water and wastewater pumps stations. Instruments allow GWA operators to monitor and control flow rates, pressures, levels, and other important parameters from all parts of the distribution network.

    Disinfection

    Unit in charge of maintaining the chlorine system for 120 wells on island. They are responsible in chlorine repairs, overhaul chlorine equipment, preventive and corrective maintenance.

  • Wastewater TreatmentOpen or Close
    This unit is responsible to ensure that all wastewater is treated and disposed in a manner compliant with the requirements of the GUAM EPA and US Federal Clean Water Act. The unit operates six (6) wastewater treatment plants (WWTP’s) ranging from 0.1 MGD to 12 MGD capacity and two ocean outfalls. GWA’s largest wastewater treatment plant at Agana will be upgraded from primary to Chemically Enhanced Primary Treatment in 2013 and 2014.

    NDWWTP

    Chemical Enhanced Primary Treatment Facility in charge in the proper operation and maintenance to comply with NPDES permit. This facility treats at average daily flow of 5.5 mgd and disposes of all solids generated at the Layon Landfill.

    AWWTP

    Primary Treatment Facility with Chemical Enhanced Primary Treatment Facility Upgrade Project scheduled for completion Dec. 2013. The primary role of the staff is the proper operation and maintenance of this facility to comply with NPDES permit. This facility treats at average daily flow of 5.8 mgd and disposes of all solids generated at the Layon Landfill.

    Southern WWTP

    Consists of 5 wastewater treatment facilities which include Agat, Umatac, Inarajan, Baza Garden and Pago Socio. Presently has an operating staff of 5 employees. The primary role of the staff is the proper operation and maintenance of this facility to comply with NPDES permits.
    ? Agat – Secondary Treatment facility with average daily flow of 800,000 gpd
    ? Umatac – Lagoon facility with average daily flow of of 200,000 gpd
    ? Baza Gardens – Secondary Treatment facility with average daily flow of 100,000 gpd
    ? Inarajan – Lagoon facility with average daily flow of of 60,000 gpd
    ? Pago Socio – Small package plant with future plans to convert to pump station

  • Wastewater CollectionsOpen or Close
    This unit is responsible to ensure that all wastewater is treated and disposed in a manner compliant with the requirements of the Guam EPA and US Federal Clean Water Act. The unit operates six (6) wastewater treatment plants (WWTPs) ranging from 0.1 MGD to 12 MGD capacity and two ocean outfalls. GWA’s largest wastewater treatment plant at Agana will be upgraded from primary to Chemically Enhanced Primary Treatment in 2013 and 2014.

    Pump Stations

    This section is responsible for the daily operations of 77 pump stations and responding to wastewater trouble calls such as SSOs. This section is divided into 3 districts, North, Central, & South relative to the island. The Northern district manages 22 pump stations that flow both to the NWWTP and The HWWTP. The Central district manages 27 pump stations which all flow to the HWWTP. Finally the Southern district manages 28 pump stations which contribute flow to the 4 Southern WWTPs.

    Maintenance

    Responsible for all corrective and preventive maintenance activities for 77 sewer pump stations and 7 wastewater treatment plants island wide. Maintenance activities include all buildings, pumps, electrical components and panels, generators, and appurtenances. Furthermore the maintenance section also handles the repair and rehabilitation of sewer forcemains and gravity sewer lines.

  • Facility Maintenance Equipment ServicesOpen or Close
    This unit is in charge of providing technical support with regards to over 300 Fleet Maintenance, Facility Maintenance , Heavy Equipment and Support of Water and Wastewater Operations.

    Fleet Maintenance

    Unit responsible in the corrective and preventive maintenance of over 250 GWA vehicles and tracking fuel consumptions.

    Generator Maintenance

    Unit responsible in the corrective and preventive maintenance of 89 generators servicing GWA’s deepwell and pump stations.

    Heavy Equipment and Facility

    Unit responsible in the maintenance of GWA’s facilities and all of its more than 15 heavy equipments.

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