A water utility's largest costs are set by the system it operates: pipe, treatment, pumping, and the debt that financed them. Its revenue is set by how much water customers take through the meter. In a normal year those two streams are close enough that the rate schedule holds. In a drought the streams separate, and the rate schedule is where the difference is absorbed, deferred, or passed to customers.
Water Finance and Management reported that Denver Water is raising water and drought rates for 2027 as the utility, which serves 1.5 million people, deals with "historic drought and ongoing inflation." The summary states that Denver's Board of Water Commissioners voted unanimously on October 28, 2026, to approve the increased 2027 rates. It does not give the percentage change, the block structure, or the revenue target behind the vote, so those details belong in the adopted schedule and the board record. The Water Finance and Management account of the Denver Water increase is a useful starting point for the sequence of events, but it does not carry the schedule itself.
Why the Fixed Share Does Not Move With Demand
Most of a utility's annual revenue requirement is set before the year begins. It covers operating expense, debt service, capital work already underway, and whatever reserve target the board has adopted. None of those items is sized to the volume that will actually be sold. When sales come in below the forecast, the requirement stays where it was, and the rate has to rise per unit sold to meet it, unless the utility draws on reserves or has a mechanism that adjusts revenue for the shortfall.
The arithmetic is simple, which is why it deserves a careful look. If a system recovers the same total from fewer units, the price per unit rises. If part of the recovery comes through a fixed charge billed regardless of use, the rise is spread across all accounts instead of concentrated on those still using water. The balance between fixed and volumetric recovery therefore decides who feels a drought most directly. That balance is a choice made in rate design, not a fact of hydrology.
What the Forecast Has to Carry
The sales forecast is the hidden input in every rate schedule. A forecast built on a normal year assumes the meter reads what it read before. A forecast built after a drought has to decide how much of the reduction is temporary, how much reflects lasting conservation, and how much reflects customers who have left or changed their use. Each assumption moves the required rate, and none of them can be checked until the year closes.
For a professional reader, this makes the forecast the first document to request. Ask which year type the forecast assumes, whether it is adjusted for conditions, and how the utility measured its variance against the prior year. If the forecast is optimistic, the shortfall returns in a later rate case. If it is conservative, the surplus shows up as reserves, which may or may not be returned to the rate base. The summary of the Denver item does not say which assumptions the board adopted, so any claim about them needs the board documents.
Reading a Schedule for the Fixed Share
Four questions sort a rate change quickly. First, what share of the revenue requirement is recovered through fixed charges, and how has that share changed over the last several cycles. Second, is the drought component tied to a defined trigger that expires when the trigger clears, or is it folded into the base rate. Third, what volume does the schedule assume, and is that figure stated in the adopted record. Fourth, what review point, if any, will test the forecast before the next budget year.
These questions do not settle whether a rate is fair. They establish what the rate is recovering and what it assumes. A utility that answers all four in writing has made its tradeoffs visible, and a reader who cannot find the answers should treat the headline percentage as incomplete. The increase may be the right response to a real revenue gap. The schedule is the document that shows whether it is.