Colorado River Cuts Signed: Arizona Loses 760,000 Acre-Feet

On 2026-08-21 the US Department of the Interior signed the 2027-2028 Colorado River operating guidelines and Record of Decision, cutting Lower Basin deliveries by 1.25 million acre-feet in each of the next two years while paying for at least 700,000 acre-feet of voluntary conservation [1].

Interior's allocation of the cut is Arizona 760,000 acre-feet, California 440,000 and Nevada 50,000 [1]. Upper Basin states take no mandatory reduction and will instead sign an agreement with Interior to operate reservoirs in a way that protects Glen Canyon Dam [1]. Sarah Porter of Arizona State University's Kyl Center for Water Policy put the effect at about a 27% reduction for Arizona overall, and roughly 50% for water users served by the Central Arizona Project [2].

What a senior Colorado River water right is, and why it can be sold

An acre-foot is the standard water unit in the American West: one acre covered one foot deep, about 1,233 cubic metres. A US household uses roughly 0.5 to 1 acre-foot a year.

Colorado River water is not allocated by need but by seniority. Inside Arizona, the Central Arizona Project (CAP) is the canal that lifts river water toward Phoenix and Tucson, and its priority is junior — so the state's reduction falls first on CAP agricultural and low-priority users, and only then on the senior on-river farms sitting beside the river itself [1][2].

A second mechanism has existed for years: paying farmers not to farm. Reclamation and CAP pay holders of senior rights a conservation fee, and the saved water stays in the reservoirs or is transferred to cities. The prevailing price in earlier rounds has been about $400 per acre-foot [3].

A signed cut turns "not farming" into a priced business

First, the reduction moves from negotiable to computable. The 2027 delivery number is now fixed, so any user needing replacement supply has to contract against a date rather than a scenario [1].

Second, replacement water now has a published price. The Central Arizona Irrigation and Drainage District signed a memorandum of understanding with Cadiz in July 2026 for up to 10,000 acre-feet a year from its Mojave groundwater bank at $850 per acre-foot in 2025 dollars over an initial 50-year term [4].

Third, a spread opens between the two prices. Conservation pays about $400 per acre-foot; replacement water costs $850. For a farm holding senior on-river rights, saving the water and selling it can be worth more than growing the crop, which argues for switching to low-water crops or fallowing and booking the payment [3][4]. That payment lands in near-100%-margin other operating income and land-and-water asset sales, not in crop revenue.

Fourth, one link runs the other way. New development along the Phoenix corridor can no longer use CAP to demonstrate a 100-year assured water supply, which makes agricultural groundwater rights converted to municipal use, plus 100% effluent reuse, the marginal supply a developer has to buy.

Companies that may be affected

Limoneira (LMNR) — a California lemon and avocado grower that owns 1,300 acres in Yuma, Arizona carrying Class 3 Colorado River riparian water rights [5]. It has already enrolled 581 of those acres in a fallowing program that pays about $1.32m a year, and has decided to stop farming a further 600 acres of lemons in favour of low-water crops in order to free up water [3][6]. What could benefit is near-full-margin water leasing and sales income: on its December 2025 call the company said the Class 3 rights plus Santa Paula Basin conserved pumping rights represent $50m to $70m of realisable value through FY2027, against FY2024 EBITDA of $21.6m and a current market capitalisation of about $251m [5][7]. In June 2026 the CFO said a long-term lease depended on what the federal government did after the on-river reservoir contracts expire on 2026-12-31 [6] — which is what was signed this week.

Global Water Resources (GWRS) — an Arizona regulated water and wastewater utility whose entire revenue, $55.8m in FY2025, comes from the Phoenix, Pinal and Tucson Active Management Areas [8]. Its supply does not come from the Colorado River; it converts a share of historical agricultural pumping rights into municipal supply and adds 100% effluent reuse [9]. A CAP cut could make that supply the scarce input, and the line it would show up in is the infrastructure coordination and financing agreement fees developers pay — $2.1m of the $17.8m of second-quarter revenue already came from that item [10]. Phoenix housing is the caveat: local single-family permits fell 4.7% year over year in the second quarter [10].

What would confirm or break this

The nearest read is Limoneira's FY2026 Q3 call on 2026-09-08: whether management converts "more opportunity" into a named agreement, whether the Yuma fallowing payments continue past the 2026-12-31 expiry, and whether the $50-70m water-value guidance is raised [6].

Next are Reclamation's award notices for water year 2027 conservation agreements: the price actually paid per acre-foot and the volume Yuma Mesa Irrigation and Drainage District enrols. A price above the historical $400 would reprice this class of senior rights [3].

Third, whether Cadiz (CDZI) converts the memorandum into a definitive water purchase agreement and finances the $403.3m Northern Pipeline [4]; without that, the $850 replacement price has no delivery mechanism. Global Water's read is its Q3 report on 2026-11-11 — coordination and financing fee recognition and connection growth [10].

Four things would break the chain. Arizona sues and a court stays the decision: the state's water department sent Reclamation seven objections on 2026-08-14, and on 2026-08-18 warned it could sue over an alleged 1922 Compact violation [11][12]. The voluntary conservation turns out to be unfunded, so a senior right holder receives an obligation rather than a cheque. Reclamation merely extends existing fallowing contracts, leaving Limoneira at about $1.32m a year [3]. Or the whole reduction is taken on junior CAP priority, so on-river Class 3 rights are never asked to conserve.

This is only a map of transmission chains you may have missed — it is not a stock recommendation.

Sources

[1] US Department of the Interior · 2026-08-21 · Press release (2027-2028 guidelines and Record of Decision) · https://www.doi.gov/pressreleases/interior-department-finalizes-plans-2027-2028-colorado-river-operations [2] CNN, as recorded by Drillr news search · 2026-08-21 · News (Kyl Center on the size of the cuts) · https://us.cnn.com/2026/08/21/climate/colorado-river-water-cuts-drought-arizona-california-nevada [3] Agriculture Dive · 2023-10-06 · Industry reporting (581-acre fallowing payment; $400/acre-foot) · https://www.agriculturedive.com/news/colorado-river-farm-agriculture-drought-conservation/695862/ [4] PR Newswire · 2026-07-02 and 2026-07-28 · Company announcements (CAIDD-Cadiz MOU; Northern Pipeline cost) · https://www.prnewswire.com/news-releases/central-arizona-irrigation-and-drainage-district-secures-up-to-10-000-acre-feet-per-year-of-new-water-supply-from-mojave-groundwater-bank-302817115.html [5] Drillr · 2025-12-23 · Limoneira FY2025 Q4 earnings call summary [6] Drillr · 2026-06-09 · Limoneira FY2026 Q2 earnings call summary [7] Drillr · 2026-08-21 · Financial and market data (financial_statements, company_snapshot) [8] Drillr · 2026-08-21 · Financial data (Global Water Resources FY2025) [9] Drillr · 2025-11-13 · Global Water Resources Q3 2025 earnings call summary [10] Drillr · 2026-08-13 · Global Water Resources Q2 2026 earnings call summary [11] KJZZ · 2026-08-14 · News (ADWR letter to Reclamation) · https://www.kjzz.org/politics/2026-08-14/arizona-pushes-back-on-a-new-colorado-river-plan-that-could-bring-catastrophic-harm [12] Los Angeles Times · 2026-08-18 · News (Arizona 1922 Compact suit warning) · https://www.latimes.com/environment/story/2026-08-18/colorado-river-legal-fight