Otero County, New Mexico: drinking water report. Otero County spans from the Tularosa Basin to the Sacramento Mountains, encompassing Alamogordo, Holloman…
Otero County spans from the Tularosa Basin to the Sacramento Mountains, encompassing Alamogordo, Holloman Air Force Base, Cloudcroft, and Tularosa. Most residents depend on groundwater from the Tularosa Basin aquifer, though mountain communities tap higher-elevation sources. The region's water supply faces pressure from military operations, agricultural demands, and the closed hydrologic basin that prevents natural groundwater recharge from external sources.
The Tularosa Basin presents unique contamination challenges tied to decades of military activity. Holloman Air Force Base has documented groundwater plumes containing trichloroethylene (TCE) and other solvents from historical aircraft maintenance operations. Off-base wells in areas near the facility have shown detectable levels of these industrial compounds. The Department of Defense continues monitoring efforts, but many private wells in the region fall outside routine testing programs that cover municipal systems.
PFAS contamination remains a concern throughout areas near current and former military sites. Aqueous film-forming foam (AFFF) used in fire training exercises contains persistent fluorinated chemicals that move readily through sandy soils characteristic of the basin. While EPA's UCMR5 testing targets larger water systems, smaller community supplies and individual wells in proximity to military facilities face higher exposure risks. The closed nature of the Tularosa Basin means contaminants that enter the aquifer remain trapped rather than flushing downstream.
Naturally occurring contaminants add another layer of risk. Arsenic appears in basin groundwater at levels that occasionally exceed EPA standards, a pattern common across New Mexico's arid regions where volcanic geology and evaporative concentration elevate mineral content. Fluoride levels also run high in some wells. Mountain communities drawing from different formations typically see lower mineral content but must address seasonal variation and limited recharge during drought periods. Lead exposure remains primarily a building-specific issue tied to older plumbing in homes and schools rather than source water contamination.
Private well owners should test annually for both regulated contaminants and emerging concerns like PFAS, particularly if located within five miles of military installations. Municipal customers can request consumer confidence reports from their suppliers, though these annual summaries may not capture month-to-month variation or compounds tested infrequently. Check your water for the latest available data on your specific location, review the water filter guide for treatment options matched to your contamination concerns, download a detailed report showing testing results and compliance history, and visit the New Mexico state page for broader context on regional water quality patterns.