Rio Del Oro Wastewater Plant Upgraded, Boosting Capacity to Support Growth

The Rio Del Oro water reclamation facility can now process 320,000 gallons of wastewater per day, up from 200,000, after New Mexico Water Service completed the first phase of a two-phase expansion in mid-March. The 60 percent capacity increase is designed to absorb new residential connections across Rio Communities and neighboring subdivisions, including Meadow Lake, while generating a supply of non-potable recycled water for public use.

That recycled supply has a specific early destination: Las Maravillas Park in Rio Del Oro. As early as this summer, treated effluent from the upgraded facility could be piped to the county-owned park for landscape irrigation, replacing potable water otherwise drawn from groundwater to sustain grass and recreation areas through the driest months of the year.

The facility's membrane bioreactor microfiltration technology produces higher-quality effluent than conventional treatment processes, making it suitable for controlled reuse under state wastewater rules. That treatment tier carries real weight in Valencia County, where both groundwater and surface water supplies are constrained and seasonal runoff varies sharply year to year.

"This improvement will help us provide safe, reliable utility services to existing and future customers and enhance the quality of their lives," the utility's interim general manager said when announcing the completed work.

A second phase, planned for later in 2026, is expected to add roughly 40,000 more gallons of daily capacity through installation of a new effluent station along with upgraded blowers and diffusers. Together, the two phases would bring the plant to approximately 360,000 gallons per day.

The expansion arrives alongside a broader financial reckoning for the service area. New Mexico Water Service has indicated it plans to pursue a general rate case in 2026 before the Public Regulation Commission, a proceeding that could affect connection fees and monthly rates for customers in Rio Del Oro, Rio Communities, and surrounding subdivisions. Property owners considering new residential connections should contact New Mexico Water Service directly to ask about availability, projected timelines, and any fee changes tied to the plant expansion before those filings advance.

For Valencia County, the Las Maravillas irrigation application is the first concrete test of how reclaimed water moves from the plant to a public amenity. County officials will need to finalize operational agreements with New Mexico Water Service covering seasonal restrictions and public-health signage before treated effluent reaches the park. How quickly those coordination steps close will determine whether the upgraded capacity produces measurable water savings before summer heat peaks.