House committee advances series of water bills including ‘Ag‑to‑Urban’ conversion; several measures pass, one held

The Arizona House Natural Resources, Energy & Water Committee on Feb. 19 advanced a package of water‑policy measures, voting to pass multiple bills with amendments and holding at least one for further stakeholder work.

The most heavily debated bill, House Bill 2298 — the so‑called “Ag‑to‑Urban” bill — moved out of committee as amended with a due‑pass recommendation after extensive testimony from irrigators, cities, developers, tribes, environmental groups and the Arizona Department of Water Resources. Supporters said converting historically irrigated farmland to urban uses can reduce per‑acre water use and create a replenishment obligation that did not previously exist; opponents warned the change could harden certain patterns of groundwater pumping, increase legal and administrative complexity, and risk unintended impacts to aquifers and downstream flows.

Committee members also advanced a set of related and separate measures: proposals to allow limited groundwater transfers within the Big Chino sub‑basin (held for further stakeholder work), to create a county water authority mechanism for La Paz County, to allow certain municipal providers in Pinal County to assume replenishment obligations for member service lands, and a concurrent memorial urging congressional action on the San Carlos Irrigation Project’s power system. Lawmakers debated a technical remediation contractor credentialing bill and a broader alternative framework for “subsequent” AMAs (active management areas) as a potential tool for rural basins.

Why it matters: These bills touch the core of Arizona’s groundwater governance — the Groundwater Management Act, Assured Water Supply program and related ADWR rulemaking — at a time of deepening Colorado River cuts, continued growth on Arizona’s periphery, and pressure for housing. Changes to how irrigated acres, “grandfathered” irrigation rights and replenishment obligations are treated can affect aquifer health, municipal rates and who pays for replenishment.

Key details and debate highlights

- House Bill 2298 (Ag‑to‑Urban): The sponsor and several municipal and development interests argued that converting irrigated farmland to residential development uses substantially less water per acre and that the bill creates a replenishment obligation and other guardrails. John Raider (City of Buckeye) said the bill would affect roughly 33,000 acres in Buckeye and estimated the concept could save roughly 100,000 acre‑feet per year in the Phoenix AMA (statement came from testimony and stakeholder estimates). Opponents including the Gila River Indian Community, Sierra Club, and agricultural advocates urged additional analysis, raised concerns about portability of credits (moving water rights up to a mile) and about impacts to AMA modeling and ‘unmet demand’ determinations. ADWR staff described ongoing informal rulemaking and asked that key policy choices (eligibility look‑back period, replenishment percentage, portability limits) be resolved with stakeholder input. The committee adopted a 14‑page strike‑everything Griffin amendment and passed the bill as amended with a due‑pass recommendation (committee reported vote announced as: 5 ayes, 3 nays, 2 absent). The committee record shows proponents, opponents and ADWR in a continuing stakeholder process.

- House Bill 27 31 (Big Chino/Verde River headwaters): The sponsor said the bill’s narrow purpose is to allow some groundwater withdrawals tied to municipal legal rights while advancing mitigation to protect Verde River flows. The sponsor asked the committee to hold the bill for further stakeholder work; the committee agreed to hold it.

- House Bill 27 27 (La Paz County water authority): Testimony from La Paz County leadership requested authority to form a county water authority to manage the county’s statutory 10% groundwater allocation made available by prior legislation (Senate Bill 1242). The committee adopted a strike‑all amendment and passed the bill as amended (vote recorded in committee minutes as 8 ayes, 0 nays, 2 absent).

- House Bill 27 53 (Pinal AMA: municipal provider assume replenishment obligations): Sponsor and municipal water providers described this as a technical, affordability‑focused change to allow municipal providers applying for designated status to assume replenishment responsibilities for member lands. Home‑builder interests pressed an amendment to protect homeowners from bearing an extra 25% “backfill” cost tied to commercial/industrial/rental historical pumping; sponsors said they were negotiating amendments and would offer changes on the floor. The committee passed the bill with a due‑pass recommendation.

- House Concurrent Memorial 2009 (San Carlos Irrigation Project power system): Representative Martinez described repeated outages and infrastructure problems at SCIP (San Carlos Irrigation Project), and testified that tribal community members and local residents suffer extended outages and high procurement costs because of federal procurement limitations. Utilities, co‑ops and tribal representatives described the historic federal framework and explained why divestiture or infrastructure investment will require congressional action. The committee passed the memorial with a due‑pass recommendation.

- House Bill 27 37 (remediation contractor credentialing): Sponsor presented a narrow amendment to require companies performing certain water/soil remediation work to be EPA‑credentialed (or equivalent oversight), citing cases where noncredentialed firms caused harm. The committee passed the bill as amended with a due‑pass recommendation.

- House Bill 25 72 (subsequent AMAs / alternative framework): This measure and its lengthy strike‑all amendment would create statutory options for landowners and water users in basins designated as “subsequent” AMAs (rural basins that lack CAP/CAP‑accessible supplies) to move or substitute irrigated acres under constrained rules while preserving historical volumetric limits. Proponents (irrigation districts, Farm Bureau) said the AMA framework is too rigid for many rural basins; opponents (Sierra Club and some legislators) warned that removing or weakening AMA protections reduces consumer protection and aquifer safeguards. ADWR expressed concern that some changes would take away key tools in the Assured Water Supply program that provide consumer protection and conservation incentives. The committee adopted the amendment and passed the bill as amended out of committee.

- House Bill 22 71 (supply and demand assessments): The bill would require additional information in ADWR’s groundwater supply‑and‑demand assessments (requested metrics included average static water level, maximum bedrock depth, index‑well counts and recharge project volumes). ADWR testified it is neutral but noted some data requests could require modeling work or additional resources and that isolated data items could be misinterpreted absent broader context. The committee passed the bill with a due‑pass recommendation.

Votes at a glance (committee outcomes)

- HB 2298 (Ag‑to‑Urban, Griffin amendment adopted): Passed out of committee as amended; committee announced result 5 ayes, 3 nays, 2 absent (due‑pass recommendation). - HB 27 31 (Big Chino / Verde mitigation): Held for further stakeholder work at sponsor’s request. - HB 27 27 (La Paz County water authority, Griffin amendment adopted): Passed out of committee as amended (committee announced 8 ayes, 0 nays, 2 absent). - HCR 20 51 (statement on Arizona rights to Colorado River water, Griffin amendment adopted): Passed out of committee as amended (committee announced 5 ayes, 3 nays, 2 absent). - HB 27 53 (Pinal AMA: municipal providers assume replenishment for member lands): Passed out of committee (committee announced 5 ayes, 2 nays, 1 present, 2 absent) with due‑pass recommendation; sponsor signaled additional technical/affordability amendment pending on the House floor. - HCM 2009 (San Carlos Irrigation Project power systems — memorial to Congress): Passed out of committee (committee announced 7 ayes, 0 nays, 1 present, 2 absent) with due‑pass recommendation. - HB 27 37 (remediation credentialing, Griffin amendment adopted): Passed out of committee as amended (committee announced 5 ayes, 3 nays, 2 absent). - HB 25 72 (subsequent AMAs alternative framework, Griffin amendment adopted): Passed out of committee as amended (committee announced 4 ayes, 3 nays, 3 absent). - HB 22 71 (ADWR supply & demand assessment information): Passed out of committee (committee announced 4 ayes, 3 nays, 3 absent).

What to watch next

• Floor amendments: sponsors repeatedly noted additional technical amendments are likely on the House floor (notably HB 27 53 and HB 22 71). Committee members asked for more time on stakeholder items (HB 27 31) or additional modeling inputs (HB 22 71). • ADWR rulemaking: ADWR repeatedly reminded the committee that it is conducting informal rulemaking and stakeholder meetings tied to Ag‑to‑Urban concepts; committee action will interact with that ongoing process. • Tribal engagement: the Gila River Indian Community and San Carlos Apache representatives emphasized continuing consultation; several speakers asked for more time or changes to address tribal concerns before bills advance further.

Ending: Committee chair Rep. Griffin closed the hearing after rolling votes and told members there are no committee meetings next week. The bills that passed will be eligible for floor consideration subject to additional amendments and stakeholder refinements.