• Groundwater

    GSI's hydrogeologists are experts at finding groundwater, determining the extent and capacity of aquifers, and helping our clients in Oregon, Washington, and California develop this valuable resource. GSI specializes in aquifer storage and recovery (ASR), an innovative technology that uses the natural storage capacity of an aquifer to store treated water underground.

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  • Environmental

    GSI's technical expertise, experience, and excellent relationships with regulatory agencies help our clients to effectively address their environmental challenges. GSI has a wide variety of environmental project management and permitting experience, including working on several Superfund sites involving contaminated soil and groundwater.

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  • Water Rights

    GSI's experts understand the complexities of water rights and have experience working with multiple state agencies, attorneys, and other organizations involved in water rights issues. We help our clients develop water rights management strategies to address their water needs.

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Latest News

GSI is Gold-Certified!

We’re proud to announce that we’ve earned our gold Sustainability at Work certification from the City of Portland! This is truly ...

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Prineville Wins Conservation Award

Congratulations to the City of Prineville for winning the Best Water Management and Conservation Plan (WMCP) award from the Oregon ...

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New: Mobile Data Collection

GSI recently implemented tablet-based field data collection and sampling that allows for real-time mapping and faster data collection. Using an iPad ...

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See you at AWWA

Are you headed to the PNWS AWWA Conference in Kennewick, Washington? We hope to see you there! Here’s where you can find ...

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