Buying Land in Mills County, Texas

Water: no confirmed district, not a 14-county one

This page previously described Mills County's groundwater as managed by the Central Texas Groundwater Conservation District (CTGCD), reasoning from Groundwater Management Area 8's joint-planning roster (San Saba, Burnet, Llano, Blanco, Gillespie in full, plus partial reach into Hays, Williamson, Travis, Bastrop, Fayette, Wharton, Colorado, and Matagorda). That reasoning doesn't hold up: GMA 8's planning roster is not the same thing as CTGCD's actual regulatory jurisdiction. CTGCD's own governing statute, Special District Local Laws Code Chapter 8810, defines the district's boundary as coextensive with Burnet County alone, and its board is elected only by Burnet County voters -- an error identical in shape to one already caught and corrected on the Hamilton County hub this pass. This research could not confirm that any groundwater conservation district actually covers Mills County. If none does, wells here are governed by the unmodified rule of capture rather than district permitting, spacing, or registration rules. A landowner planning a new well should confirm this directly with the Texas Water Development Board or the Texas Alliance of Groundwater Districts before assuming either that a district applies or that none does.

Septic, subdivision rules, and agricultural valuation specifics

On septic, this research turned up no indication that Mills County holds TCEQ OSSF authorized-agent status, which points toward TCEQ's Region 9 office in Waco as the likely permitting authority for on-site sewage facilities on unincorporated county land -- confirm that directly, since authorized-agent status can change and this research did not find a definitive current list entry either way. On subdivision, Mills County is not coasting on an old ordinance: its Subdivision Regulations & County Road Standards were amended as recently as November 25, 2024, following a prior amendment in November 2023, which suggests active county attention to plat and road-standard requirements -- get the current version before platting or re-platting any tract.

For working land, the Mills Central Appraisal District publishes its own agricultural manual along with specific beekeeping guidelines and minimum-acreage requirements for a wildlife-management valuation -- concrete, locally administered detail on how open-space agricultural (1-d-1) valuation actually gets qualified and reviewed in this county, beyond the general statewide five-of-seven-years use test. That beekeeping route matters in a county this size: it lets a smaller tract that would never support a viable cattle or hay operation still qualify for the same open-space tax treatment as larger working ranches nearby, provided the appraisal district's minimum-acreage and management standards are actually met and documented. If you're counting on a seller's existing ag or wildlife valuation carrying over, confirm current acreage and management-plan documentation requirements with the appraisal district directly, since a change in ownership or use can trigger a review -- and converting agricultural land to another use can trigger a rollback tax recapturing prior tax savings.