In this episode of 21st Century Water, we sit down with Glenn Marzluf, CEO and General Manager of Del-Co Water, to explore the growth, innovation, and strategic leadership shaping one of Ohio's fastest-growing water utilities. With roots in civil engineering and a unique journey through municipal roles in Florida and Ohio, Glenn shares how intentional career steps and a deep sense of purpose led him to his current role.

We trace Del-Co's origins from a rural cooperative founded in the 1970s to an expansive utility covering 830 square miles across eight counties. Glenn explains how Del-Co’s growth has been fueled by regional consolidation and a commitment to member-focused service, supported by a nimble governance model. This structure allows for flexible, proactive planning—like pre-engineering transmission lines for anticipated industrial users—and innovation in rate design. Glenn highlights their recent shift to an inclining block rate to encourage water conservation, a rare move in the Midwest, aimed at reducing peak-day demand and extending infrastructure lifespan.

On infrastructure, Glenn outlines the utility’s deliberate investments: four treatment plants, several new elevated tanks, and significant capacity at their flagship Olentangy plant. Water quality is a priority, with upgrades like ultraviolet disinfection and an upcoming granular activated carbon retrofit to combat PFAS, disinfection byproducts, and taste/odor issues. Distribution strategies focus on resiliency and redundancy, ensuring the system remains robust and future-proof.

Del-Co’s remarkable source water resiliency stems from 2.6 billion gallons of upground reservoir storage, allowing operational flexibility and water quality control unmatched by many peers. Their partnership with the City of Columbus on the Doutt Reservoir further strengthens supply.

Technology adoption is another pillar. From IBM Maximo for asset management to Esri GIS and Oracle’s cloud-based customer system, Del-Co emphasizes scalable, cloud-based platforms. Glenn even discusses canine-led leak detection, a novel tool for maintaining low water loss in a modern, distributed network.

Community engagement is intentional and deep-rooted. Del-Co has grown from an inward-facing utility to a community pillar, earning corporate citizenship honors and serving as a statewide training hub with its Wolf Water Center. Annual member meetings have evolved into educational open houses, reflecting a broader commitment to transparency and trust.

As we look ahead, Glenn defines his legacy around securing sustainable source water, leveraging data and conservation to manage peak demand, and developing the next generation of leaders. Del-Co Water, under his guidance, is a case study in how cooperatives can drive 21st and 22nd century water excellence in both growth and governance.

Del-Co Water Website: https://delcowater.org/

Aquasight Website: https://aquasight.io/