Large providers are regulated under one of 4 conservation programs:
Gallons Per Capita Day Program (GPCD)
Providers are assigned an annual total gallons per-capita day target that is recalculated each year based on several factors. The actual amount of water withdrawn, diverted, or received by the provider for non-irrigation use is compared to the amount allowed by its total GPCD target to determine compliance. A flexibility account allows providers to use more water than their total GPCD requirement in some years, subject to a maximum negative and positive account balance limit. This is the default program for providers with a Designation of Assured Water Supply, however they may elect to be regulated under another program.
Non-Per Capita Conservation Program (NPCCP)
This program, originally established in 1992, was modified during the Third Management Plan, and was updated for the Phoenix, Pinal, and Santa Cruz AMAs Fourth Management Plans. This program is mandatory for all large municipal providers that do not have a Designation of Assured Water Supply. Participants are required to implement a basic public education program that communicates the importance of water conservation to customers at least twice annually as well as provide free written information on water conservation to customers upon request. Providers must choose one or more additional water conservation Best Management Practices (BMPs) based on their number of service connections (combined total of residential and non-residential water service connections).
*Effective Jan 1, 2023 for providers in the Phoenix, Pinal, and Santa Cruz AMAs. Providers in the Tucson and Prescott AMAs will not have any changes in the number of BMPs required from the Third to Fourth management plan.
BMPs are split into 7 categories: Public Awareness; Education and Training; Outreach Services; Physical System Evaluation and Improvements; Ordinances, Conditions of Service, Tariffs; Rebates/Incentives; Research/Innovation.
Providers are required to submit a Conservation Efforts Report (CER) with their Annual Water Withdrawal and Use Report.
Alternative Conservation Program (ACP)
This program was developed to give large providers with a disproportionately increasing non-residential water use an alternative to the GPCD program. Requirements include a limitation on groundwater use, a residential GPCD, and non-residential reasonable conservation measures.
Institutional Provider Program (IPP)
This program allows providers with primarily non-residential uses and who are unable to economically utilize non-groundwater sources to be regulated under a program that focuses on the specific institutional water-use characteristics of their service area. Providers are assigned a maximum residential GPCD requirement and specific conservation measures for non-residential uses and will also be required to comply with individual user, distribution system, and reporting requirements.
Municipal providers must also meet lost and unaccounted-for water limitations of not greater than 10% on an annual or 3-year-average basis for large providers or 15% for small providers. Lost and unaccounted-for water is defined as the total water from any source, withdrawn, diverted, or received in a year that enters a municipal provider’s groundwater distribution system, minus the total amount of authorized deliveries from that groundwater distribution system made by the municipal provider in that year. It includes line leakage, meter under-registration, evaporation or leakage from storage ponds or tanks, system and hydrant leaks or breaks, and illegal connections.