ARRO Consulting is a leading engineering, environmental, information technology, and management consulting firm headquartered in Lancaster County with six strategically located offices in Pennsylvania and Maryland. For over 75 years, ARRO has worked to become the consulting firm of choice, providing unparalleled results in the following service areas to meet our clients’ technical and financial challenges:

  • Civil Engineering

  • Environmental Compliance

  • GIS

  • Grants and Funding

  • Leak Detection

  • Municipal Consulting

  • Planning

  • RPR/Construction

  • Stormwater/MS4

  • Water

  • Wastewater

  • Zoning

From sustaining water resources, to managing public works and developing parks, ARRO has been strengthening and protecting communities since 1946. Learn more at