Council reduces threshold but rejects steeper cuts urged by residents
The Tucson City Council voted 4-3 on Tuesday to reduce the monthly threshold that triggers review under the city's large-quantity water user ordinance from 7 million gallons to 6.4 million gallons. The action falls short of calls from residents and environmental groups who urged sharper reductions — down to under 2 million gallons per month — and sets a timetable for additional public hearings on conservation conditions.
The ordinance, passed more than a year ago, requires developments that plan to use very large volumes of water to meet conservation requirements. Because the original 7 million-gallon benchmark is high, council members and Tucson Water officials have not had an application that crossed it, leaving the policy largely untested.
What the new thresholds mean
Under the council’s action, an applicant that proposes to use more than 6.4 million gallons per month would need approval from the mayor and City Council. The council also directed staff to prepare conservation terms for a secondary tier for users drawing between 3.7 and 6.4 million gallons per month, with those conditions to be applied at Tucson Water’s discretion. A public hearing to discuss specific conservation requirements is scheduled within three months.
| Monthly use | Approval or review |
|---|---|
| > 6.4 million gallons | Mayor & City Council approval required |
| 3.7–6.4 million gallons | Conservation terms set by Tucson Water (discretionary) |
| < 3.7 million gallons | Standard review |
Competing priorities: conservation advocates vs. economic concerns
Speakers at the council meeting framed the debate as one about community values and long-term protection of the desert and water supplies. Ivy Schwartz, a Tucson resident who addressed the council, highlighted the scale of the original threshold by comparing it to household use.
"The large water user ordinance is really about data centers. I mean, we know that right? And this discussion is actually about values," Schwartz said. "Values that we hold dear in this community. We want to protect this land. We want to protect the desert. We want to protect the water here."
Environmental organizations and several members of the public urged a much lower threshold — some advocating for a quarter of the original 7 million-gallon trigger — and strict replacement or mitigation requirements. One proposal mentioned during the meeting was a strict 2-to-1 replacement policy for water used by large developments.
Council members expressed concern about the potential economic impact of sharply lowering thresholds. Councilmember Kevin Dahl noted that the high original threshold had the practical effect of deterring large, high-water users, such as data centers, from siting in Tucson. He also said lowering the limit further could affect other industries and complicate efforts to attract jobs.
Next steps and local implications
With the 4-3 vote, the council set a near-term process for defining conservation obligations. Over the next three months, staff will draft the specific terms that would apply at the 6.4 million-gallon ceiling and for the secondary 3.7 million-gallon tier. Those proposals will be the subject of a public hearing before final adoption.
- Residents and environmental groups: pressing for stricter limits and strong replacement or mitigation policies.
- City Council and Tucson Water: balancing conservation goals with economic and development considerations.
- Potential large water users: will face clearer oversight if their monthly use exceeds the new tiers.
The council’s decision narrows but does not resolve the debate over how aggressively Tucson should insulate its limited water resources from large industrial and commercial demand. The forthcoming public hearing will provide an opportunity for residents, advocates and business representatives to weigh in on the concrete conservation measures that would accompany the revised thresholds.
