17.2 Budgets, Water Rates & Financial Management
Key Takeaways
- Water Rates and Administer Compliance and Budgets are named sub-topics in the SWRCB distribution Regulations, Management and Safety category.
- 23 CCR 3701(c)(4) makes budget development and control explicit Grade IV wastewater exam content.
- Operating budgets cover recurring costs while capital budgets fund assets with multi-year lives, and the two are funded differently.
- A cost-of-service rate study allocates costs to customer classes and produces the fixed and volumetric rate components.
- Proposition 218 requires a written notice to every affected parcel, a public hearing at least 45 days later, and prohibits adoption if written protests come from a majority of affected parcels.
Two Budgets, Two Purposes
| Operating budget | Capital budget | |
|---|---|---|
| Covers | Recurring annual costs | Assets with a multi-year life |
| Examples | Salaries and benefits, chemicals, power, laboratory, parts, contracted services, insurance, administration | Main replacement, tank rehabilitation, a new well, treatment plant upgrade, SCADA replacement, vehicles |
| Funded by | Rate revenue | Rate revenue transferred to capital, reserves, debt (revenue bonds, State Revolving Fund loans), grants, connection/capacity fees |
| Horizon | One or two years | A 5- to 20-year capital improvement plan |
California utilities have two major low-cost capital funding sources, both administered by the State Water Board's Division of Financial Assistance: the Drinking Water State Revolving Fund (DWSRF) and the Clean Water State Revolving Fund (CWSRF), with additional grant and principal-forgiveness programs for disadvantaged communities.
Operating Cost Structure at a Typical Plant
| Category | Typical share |
|---|---|
| Salaries, wages, and benefits | 40-55 percent - the largest single category at nearly every utility |
| Power | 10-25 percent, higher at plants that pump a lot or aerate |
| Chemicals | 5-15 percent |
| Maintenance, parts, and contracted services | 8-15 percent |
| Laboratory and monitoring | 2-6 percent |
| Insurance, administration, regulatory fees | 5-10 percent |
| Debt service | Highly variable; often 15-30 percent where recent capital work was financed |
Fixed versus variable is the distinction that matters for rate design: roughly 75 to 85 percent of a water utility's costs are fixed - they do not fall when customers use less water. That is why a drought that cuts sales 25 percent can create a revenue crisis even though production costs fell.
Cost-of-Service Rate Studies
A rate study answers: what does it cost to serve each class of customer, and how should the rate structure recover that?
- Determine the revenue requirement - operating costs, debt service, capital funded from rates, and reserve contributions.
- Functionalize costs - source, treatment, transmission, distribution, storage, meters and services, customer service, administration.
- Classify costs by the cost driver they respond to - base (average day) costs, maximum day (extra capacity) costs, maximum hour costs, meter and service costs, customer costs, and fire protection costs.
- Allocate to customer classes by each class's contribution to those drivers.
- Design rates that recover each class's allocated cost.
Rate Components
| Component | Recovers | Conservation effect |
|---|---|---|
| Fixed (service/readiness-to-serve) charge, usually scaled by meter size | Customer and meter costs, and some capacity cost | None - the customer pays it regardless of use |
| Volumetric (commodity) charge per unit of water | Base and extra-capacity costs | Direct - the customer saves by using less |
The tension is structural: a high fixed charge gives revenue stability but weakens the conservation price signal, while a high volumetric charge strengthens conservation but exposes the utility to revenue swings.
Rate Structures
| Structure | Description |
|---|---|
| Uniform | One price per unit, all usage |
| Increasing block (tiered) | Price rises with consumption; the standard California conservation structure |
| Decreasing block | Price falls with consumption; largely abandoned for potable water |
| Seasonal | Higher summer rates reflecting peak capacity costs |
| Budget-based (water budget) | Each customer gets an efficient allocation based on household size, irrigated area, and evapotranspiration; use above it is priced at penalty tiers |
| Drought surcharge | Temporary rates that recover fixed costs when sales fall |
[!IMPORTANT] Tiered rates in California must be cost-justified. Following appellate decisions applying Proposition 218, a public agency must be able to demonstrate that the price in each tier reflects the cost of providing service at that level of use - a tier structure adopted purely to punish high use, without a cost basis, is legally vulnerable. This is why budget-based structures are built on documented efficiency standards and why rate studies now carry detailed tier cost derivations.
Proposition 218
Article XIII D of the California Constitution governs property-related fees, including water and sewer rates.
| Requirement | Detail |
|---|---|
| Written notice | Mailed to the record owner of each identified parcel and to each tenant directly liable for payment, stating the proposed fee, the basis of the calculation, the reason for it, and the date, time, and place of the hearing |
| Notice period | At least 45 days before the public hearing |
| Public hearing | The agency must consider all protests |
| Majority protest | If written protests are submitted by a majority of the owners of the identified parcels before the close of the hearing, the agency may not impose the fee |
| Substantive limits | Revenue may not exceed the funds required to provide the service; may not be used for any other purpose; may not exceed the proportional cost of service attributable to the parcel; may not be charged for a service not actually used by or immediately available to the parcel; and may not fund general governmental services |
Practical management consequences: a rate increase takes months to execute, so rate planning must lead the need by at least a year; multi-year rate schedules adopted at one hearing are common because they avoid an annual protest cycle; and a utility that defers rate increases until it is in crisis discovers it cannot fix the problem quickly.
Reserves and Debt
| Reserve | Purpose | Typical target |
|---|---|---|
| Operating reserve | Cash flow smoothing | 90-180 days of operating expense |
| Capital replacement (R&R) reserve | Fund renewal without borrowing | Set from the asset management plan |
| Emergency reserve | Respond to a main break, an earthquake, a source loss | Policy-set |
| Rate stabilization reserve | Absorb drought revenue shortfalls | Policy-set |
| Debt service reserve | Required by bond covenants | Usually one year of debt service |
Debt service coverage ratio is the key covenant metric:
Bond covenants commonly require 1.25 or higher. A utility that lets DSCR slip toward 1.0 loses access to affordable capital exactly when it needs to fund replacement.
Worked example. A district has annual revenue of $8.4 million, operating expenses of $5.9 million, and annual debt service of $1.7 million. Net revenue = 8.4 − 5.9 = $2.5 million DSCR = 2.5 / 1.7 = 1.47 - comfortably above a 1.25 covenant.
Why This Is a Regulatory Issue
California evaluates a public water system's technical, managerial, and financial (TMF) capacity as a condition of its domestic water supply permit. Financial capacity means revenue sufficiency, creditworthiness, and fiscal controls. A system whose rates do not fund operation, maintenance, monitoring, certified staffing, and asset renewal is a system with a permit deficiency, not merely a budgeting problem - and chronic financial incapacity is one of the pathways by which a struggling California system ends up consolidated with a larger one under the state's water system consolidation authority.
A water district proposes a rate increase. Written protests are received from the owners of 51 percent of the identified parcels before the close of the public hearing. What must the district do?
A utility has annual revenue of $6.0 million, operating expenses of $4.2 million, and annual debt service of $1.2 million. What is the debt service coverage ratio?
During a severe drought a utility's water sales fall 25 percent, yet it faces a revenue shortfall rather than a matching cost reduction. Why?