Sunland Park Water Hardness & Quality Report (2026)

Camino Real Regional Utility Authority supplies water to Sunland Park and Santa Teresa, drawing exclusively from groundwater wells that tap the Mesilla Basin Aquifer. This utility operates without surface water treatment plants. Instead, raw water is directly pumped from numerous wells, disinfected with chlorine at wellheads or booster stations, and then distributed to more than 15,000 connections. These connections span residential, commercial, and industrial areas, including the Santa Teresa Industrial Park. The watershed, part of the Chihuahuan Desert ecoregion, receives limited recharge from the Rio Grande and ephemeral arroyos originating in the Sierra de Cristo Rey and Robledo Mountains.

The groundwater's character is shaped by the local geology. The aquifer is composed of unconsolidated Quaternary sands, gravels, and silts, interbedded with Santa Fe Group sediments like arkosic sandstones. These formations contain abundant calcium and magnesium-bearing minerals, originating from Paleozoic limestone and dolomite outcrops in the Franklin and Organ Mountains. Dissolution of these minerals, along with gypsum from the Permian Castile Formation, occurs as water moves through the ground, resulting in a hard water supply.

This very hard water significantly accelerates scale buildup in appliances like water heaters, dishwashers, and washing machines, potentially reducing their efficiency by up to 50% and shortening their lifespan. Homeowners often find that faucet aerators and showerheads clog quickly, necessitating frequent cleaning. Laundry may feel stiff, requiring extra detergent, and soap scum can form on bathroom tiles and fixtures. To combat these issues, a whole-house water softener is highly recommended. Additionally, consider annual descaling of water heaters and using scale-inhibiting filters. It's also important to note that CRRUA has had past issues with water quality, including arsenic exceedances, though recent reports indicate potability post-disinfection.