ARRO has enjoyed a reputation for excellence in the water and wastewater industry for more than half a century. Our comprehensive capabilities, innovate solutions and extensive knowledge of ever-changing regulations, ensure your project is in the right hands. We are uniquely positioned to provide our public and private sector clients with creative, cost-conscious, and environmentally-sound solutions to their water and wastewater needs. From ensuring clean water for residents, to protecting the environment in which we live and work, we are committed to providing services that make our communities better.

Wastewater Capabilities

  • Wastewater treatment
  • Process evaluation/modeling/engineering
  • Solids handling facility design
  • Act 537 sewage facility planning
  • Pumping stations
  • Collection and conveyance systems
  • Permitting and regulatory compliance
  • Construction management and observation
  • Odor control
  • Flow metering
  • Management studies
  • Infiltration and inflow (I/I) investigations
  • Contract operations
  • Biological nutrient removal (BNR
  • Enhanced nutrient removal (ENR)
  • Tapping fee calculations
  • Rate and utility valuation studies
  • Industrial pretreatment and compliance

Hydraulic Modeling

  • Wastewater collection systems
  • Water distribution systems
  • Stormwater systems

Engineering Services

  • Electrical
    • Power distribution
    • Standby/emergency power systems
    • Energy conservation/management
    • Interior/exterior lighting
    • Process instrumentation and controls
    • Telemetry control systems
    • Security/alarm systems
    • SCADA layout
  • Structural
    • Building analysis and design
    • Foundation analysis and design
    • Existing structure evaluations
  • Mechanical
    • HVAC
    • Plumbing
  • Stormwater and erosion/sediment control



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