For 75 years, ARRO has been a cornerstone of the wastewater industry in the mid-Atlantic region. Our clients can feel confident that they are in good hands, thanks to our comprehensive capabilities, innovative solutions, and extensive knowledge of ever-changing regulations. We are uniquely positioned to provide our public and private sector clients with solutions to their wastewater needs. From making sure your residents have clean water, 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 Facilities
  • 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 & Staffing 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
  • On-Lot Disposal Systems (OLDS)
  • Nutrient Credit Trading
  • Asset Management
  • O & M Manuals & Standard Operating Procedures
  • Capital Planning
  • GIS & Geospatial Services
  • Grant Writing & Assistance

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