SB 1855 seeks to enhance the oversight and long-term planning related to groundwater resources in Texas by modifying existing plat approval requirements for land subdivisions. Under current law, a subdivision relying on groundwater must submit documentation certifying the availability of that groundwater. SB 1855 updates Sections 212.0101 and 232.0032 of the Local Government Code to mandate that such documentation also conforms to formalized rules adopted by the Texas Commission on Environmental Quality (TCEQ).
Specifically, the bill requires that any plat application for a subdivision using on-site groundwater must include a certified statement—prepared by a Texas-licensed engineer or geoscientist—verifying that adequate groundwater is available and that the certification complies with new TCEQ standards. If an application lacks this documentation, municipalities and county commissioner courts are required to deny the plat. Additionally, the bill amends Section 35.019 of the Water Code to authorize counties within priority groundwater management areas to adopt water availability requirements to prevent over-extraction of groundwater resources.
To ensure regulatory uniformity, the bill directs TCEQ to adopt implementing rules by January 1, 2026. These rules will establish both the acceptable format for groundwater certifications and the criteria for credible evidence of groundwater availability. This legislation applies prospectively to plat applications submitted on or after the effective date.
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The Committee Substitute for SB 1855 introduces several meaningful differences from the originally filed version, focusing on streamlining the plat approval process and limiting local discretion. One of the most notable changes is the removal of language that previously allowed municipal authorities and commissioners courts to deny a plat based on their own assessment of whether groundwater is adequately available. The original version provided two bases for denial: either the application failed to meet the documentary requirements or the local entity determined that water availability was insufficient. In contrast, the substitute version narrows this authority, mandating disapproval only if the required groundwater certification is not provided or is noncompliant with Texas Commission on Environmental Quality (TCEQ) rules.
This shift represents a substantive policy change. By focusing enforcement on procedural compliance rather than substantive water sufficiency judgments, the substitute version centralizes the role of TCEQ in determining what constitutes credible groundwater availability. This limits the variability of decision-making at the local level and creates a more predictable regulatory framework for developers and local governments alike.
Additionally, the Committee Substitute omits new language proposed in the original bill that would have allowed commissioners courts in priority groundwater management areas to independently determine whether a developer had failed to show adequate water supply, as part of their authority under Section 35.019 of the Water Code. Instead, the substitute integrates these concerns more cleanly within the broader legislative structure, avoiding duplicative or potentially conflicting standards.
Overall, the substitute version of SB 1855 reflects a policy preference for regulatory consistency and centralized rulemaking authority over discretionary local enforcement, simplifying implementation and aligning the plat review more directly with statewide environmental standards.