Hobbs Water Hardness & Quality Report (2026)

Hobbs, New Mexico, the Lea County seat — a major southeast New Mexico oil and gas city (Hobbs and Lea County are at the heart of the Permian Basin's New Mexico extension — one of the most productive oil and natural gas producing regions in the Western Hemisphere), a major petrochemical community in the Permian Basin, a rapidly growing energy sector city adjacent to the Texas border and Odessa–Midland, and a diverse Lea County community with a large Mexican-American and oilfield worker population — draws its municipal water supply from the Ogallala Aquifer and Capitan Aquifer via the City of Hobbs Water Division. Water hardness in Hobbs measures 391.5 mg/L — classified as extremely hard.

Hobbs's extremely hard supply — among the hardest in New Mexico — reflects the Permian Basin and southern High Plains aquifer's extreme calcareous evaporite geology. The Ogallala Aquifer and Capitan Aquifer at Hobbs–Lea County draw from: the Permian Capitan Formation (the Capitan Reef Complex — a Permian calcareous limestone reef complex, one of the most calcareous aquifer formations in the western US, running through Lea County); Permian Yates, Tansill, and Seven Rivers Formations (highly calcareous Permian evaporite carbonate of the Delaware Basin); and the Ogallala Formation (calcareous caliche-rich southern High Plains sand). The extreme Permian evaporite geology produces the extreme 391.5 mg/L.

At 391.5 mg/L, Hobbs residents face severe hard water challenges. Water softeners are essentially mandatory. City of Hobbs Water Division consistently delivers water meeting all New Mexico NMED and EPA Safe Drinking Water Act requirements.