Staff present zoning options to address groundwater concerns; commissioners weigh density limits

Scott (planning director) opened a continuing discussion on groundwater quantity and minimum lot sizes, distributing draft amendments to the Unified Zoning Code and a comp-plan language option. He said Kansas regulates municipal public water systems but does not regulate on-site domestic well quantity; county subdivision rules require water quality testing for bacteria and nitrates but do not require quantity testing.

Scott presented four approaches: (1) change the rural residential (RR) minimum lot size from 2 to 5 acres; (2) add a supplementary-use restriction making most residential uses in RR permitted only if served by municipal or rural water; (3) add a similar general provision in the zoning code; and (0.25) adopt a conditional-use framework that would allow single-family homes on less than 2 acres only via conditional use, allow 2–4.95 acres by conditional use, and allow 5+ acres by right. He emphasized trade-offs: uniformity and clarity versus flexibility and appeal-process options (variance or conditional use).

County staff and stakeholders flagged data limitations. Staff showed a USGS groundwater map from 1988; Anthony Seiler of the Sedgwick County Farm Bureau said the Kansas Geological Survey can update maps using newer well records or more expensive field surveys, but that KGS only receives completed well records (not failed attempts), which can understate marginal areas. Seiler and county technical staff explained hydrogeologic differences across the county (saturated sand vs. shale-hosted veins) and shared local anecdotes of wells requiring repeated redrilling or emergency mains after development.

Commissioners debated competing priorities. Some said raising minimum lot sizes could price out buyers and reverse past policy choices that reduced lot-size barriers to homeownership; others said there are parts of the county where urban-scale, well-dependent subdivisions are not sustainable and that a countywide density standard coupled with conditional-use flexibility is a pragmatic first step. One commissioner said they may not support new subdivision zone changes in rural residential areas until staff returns with additional data and recommendations.

Next steps: staff recommended forming a broader stakeholder group (including Farm Bureau, Wichita water utility, rural water districts, WABA and county technical experts), scheduling meetings, and returning a consensus recommendation to the commission; staff suggested a target to report back around budget-adoption time (end of August).