Conservation-Oriented Residential Rate Design Under New York Public Service Commission Regulation

The preceding chapters establish the policy framework: conservation remains an important public objective, tiered rates can provide a useful price signal, and basic indoor water needs do not arise in identical amounts behind every residential meter. This chapter turns to New York's own regulatory record. That history is especially important because the present Veolia Water New York structure in Rockland did not emerge without discussion of household size, basic indoor demand, cost recovery, and administrative practicality.

The New York Public Service Commission regulates investor-owned water utilities under a broader obligation to establish just and reasonable rates while ensuring safe and adequate service. Conservation therefore operates within rate design rather than outside it. The Commission must consider conservation objectives together with cost recovery, customer impacts, service classifications, and administrative practicality. That broader inquiry provides the regulatory context for the rate-equity question examined in this report: not simply whether a rate applies uniformly, but whether the structure operates reasonably when relevant customer circumstances differ.

The modern Rockland residential block structure was developed in Case 16-W-0130. SUEZ Water New York proposed a year-round three-block inclining structure for single-family residential customers. Its rate witness described the first 5 CCF per month, or approximately 3,750 gallons, as an amount intended to include the basic needs of an average family while excluding discretionary lawn or other outdoor use. The next 7 CCF were associated with moderate summer use, and use above 12 CCF was intended to receive the strongest conservation signal. Black & Veatch's conservation work used a Rockland average household size of 3.07 as part of the tier analysis. It further explained that the second tier 'recognizes the variability in household sizes,' was intended to accommodate most single-family households most of the time, and that third-tier usage should generally reflect discretionary use. Black & Veatch also stated that no single conservation rate structure would work for all households.¹⁹

The 2016 record also identified the limitation that now sits at the center of this report. Rockland County's Amawalk consultants did not reject the concept of a three-tier structure or the 5-CCF first block outright, but they questioned whether the record adequately established that 5 CCF represented basic needs across the County and warned that larger single-family households or customers with special circumstances could exceed 5 CCF even during winter months. In rebuttal, SUEZ's rate witness expressly acknowledged that an inclining-block structure can place a large household's basic-needs usage into the second and third blocks. He described that as part of the difficulty of establishing one rate structure for every customer type and size.

That same rebuttal also shows why the question of who bears more of the utility's required revenue cannot be answered by assumption. Herbert argued that when fixed customer costs are not fully recovered in the monthly customer charge and are instead recovered through volumetric rates, higher-use customers can bear more of those customer costs. He specifically connected that concern to larger households, which require more total usage to meet basic needs. That historical testimony does not establish that larger households currently subsidize smaller households under Veolia's present tariff. It does, however, show that the direction of any cross-subsidy or revenue shift should be determined from current cost-of-service and billing evidence rather than assumed from present bill levels.²⁰

The Commission adopted the conservation-oriented rate design in January 2017. In doing so, it described the design as a purposeful balancing of the interest in encouraging conservation with the type of customers affected, the type of use affected, and administrative practicalities. The Commission declined to require the community-specific anthropological study proposed by one participant, explaining that such a service classification would be unjustifiably difficult to administer. The Order rejected that particular proposed mechanism; it did not state that household size was irrelevant to residential demand or that basic-needs usage could never enter higher blocks.²¹

The 2017 Order also required SUEZ to file a comprehensive service-classification study by February 1, 2019. SUEZ filed the Black & Veatch study on January 31, 2019. The study examined the existing service classifications, including whether multi-family customers should be divided into subclasses so that the inclining-block structure would not produce negative effects based on building type or size. It was therefore a real Commission-required review, but its central unit of analysis was service classification and multi-family building characteristics rather than the number of people living in separately metered single-family households.²²

The study nevertheless contains useful rate-equity evidence. Black & Veatch observed that, all else equal, a master-metered multi-family property with more dwelling units can pay more per gallon because more usage falls into higher-priced blocks. It identified persons per dwelling unit as one of several factors that can affect consumption. At the same time, SUEZ did not systematically track the number of units in multi-family buildings, and Black & Veatch obtained dwelling-unit information for only a limited group of properties. The underlying analysis reported substantial variation and stated that adverse effects from the inclining-block structure could not be conclusively assumed. The Executive Summary used stronger language, stating that the higher per-gallon rate had no adverse impact overall. The revised report treats those formulations as distinct and does not use the 2019 study as though it resolved the separate question of single-family household occupancy.²³

The study also recommended moving two- and three-unit master-metered properties into the single-family classification because their aggregate usage patterns were closer to the existing single-family class. That recommendation is relevant to classification, but aggregate usage similarity is not the same inquiry as whether a fixed conservation threshold treats basic indoor demand equitably across households with different numbers of residents. The distinction matters because a service-classification study can be complete for its stated purpose without answering the occupancy question examined here.

The subsequent 2019 rate filing confirms the continuity of the basic design. Herbert again described the residential structure as first 5 CCF, next 7 CCF, and over 12 CCF, with the first block intended to include the basic needs of an average family and exclude discretionary outdoor use. For master-metered multi-family customers, by contrast, he explained that the blocks were larger because multiple families were served from one meter: first 20 CCF, next 380 CCF, and over 400 CCF. He also explained that the multi-family rates did not rise as steeply because multi-family usage was less seasonal. The Joint Proposal adopted in Case 19-W-0168 continued the Rockland 5/12-CCF single-family thresholds and the 20/400-CCF multi-family thresholds while changing the prices charged within the blocks.²⁴

The multi-family structure is not a precedent requiring an occupancy adjustment for separately metered residential customers. Multi-family properties differ in meter configuration, building form, usage patterns, and cost allocation. It is nevertheless relevant context because New York rate design already recognizes that the amount and pattern of residential activity behind a meter can matter when conservation blocks are established. That makes the remaining single-family question more precise: whether one common starting threshold adequately distinguishes basic indoor water needs from discretionary higher use when household occupancy varies materially.

The current Veolia tariff continues this distinction. Service Classification No. 1 in the New York Rate District applies to separately metered residential service and retains the first 5 CCF, next 7 CCF, and over-12-CCF monthly blocks. Service Classification No. 6 applies to master-metered multi-family residential service and retains the first 20 CCF, next 380 CCF, and over-400-CCF blocks. Accordingly, the issue examined by this report is not that every residential customer in Veolia's system receives one identical allocation. It is that customers within the applicable separately metered residential class receive the same starting block without an occupancy adjustment.²⁵

More recent Liberty proceedings provide a separate New York example of examining the effect of conservation tiers on indoor-only demand. Liberty's 2024 Threshold Analysis studied repeated Tier 4 occurrences during non-peak months and found a possible relationship with larger household size, concluding that the impact on larger households needed further study. Liberty later testified in its 2026 rate filing that the company and Department of Public Service Staff met in summer 2025 and jointly determined that further study was not required at that time. Liberty also stated that it was not proposing a conservation-rate redesign largely because it lacked sufficient data to support one. Read together, those developments do not establish either that the household-size concern was disproven or that an occupancy adjustment is required. They show that New York has recognized the question and that the answer depends on an adequate factual record.²⁶

The New York record therefore supplies more than a theoretical basis for the present inquiry. The first Rockland block was developed around an average-household conception of basic indoor needs; larger-household effects were raised in the original proceeding; the utility acknowledged that basic-needs usage can enter higher blocks; the Commission balanced conservation with customer and administrative considerations; and the later classification study addressed related building-size issues without directly testing household occupancy within the separately metered residential class. The rate-equity question remains whether that unresolved issue can now be addressed in a way that preserves strong conservation incentives and fair revenue recovery.