ARRO is a full-service water and wastewater engineering firm, providing innovative and economical solutions to our public and private sector clients. Our capabilities range from feasibility studies complete engineering, design, construction management and testing assistance for water and wastewater facilities.


Lewisberry Area Joint Authority

ARRO began operating and maintaining this 100,000-gallon per day activated sludge wastewater treatment plant in Jan...

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Contract Operations & Maintenance Services

Since May 2002, ARRO has been responsible for the normal operation and maintenance of the Conewago Township Sewer A...

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Wastewater Treatment Plant Upgrade Design & Bid

A food processing facility located in Lancaster County contracted ARRO to complete design and bidding services for ...

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Guest Farm Village Sewer Authority Wastewater Treatment Plant Upgrade

ARRO regularly completes applications for funding water, stormwater, and wastewater projects for our clients. In th...

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John F. Martin WWTP

ARRO began the project with a feasibility study, including a full examination of which processes and what equipment...

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