About the Division
San Luis water crews maintain and respond to problems related to water distribution, treatment and customer complaints. With the use of a backflow program, laboratory services, maintenance and quality process control, the division seeks to provide safe and reliable water service to our residents while complying with state and federal environmental and health standards. The Water Division offers 24-hour on call service to meet the community’s needs. For after hours emergencies please call (928) 341-2420.
Water Quality Report
This report presents important information on the City of San Luis water quality and our constant goal to provide you with a safe and dependable supply of drinking water. We want you to understand the efforts we make to continually improve the water treatment process and commitment to ensure the quality of your water.
2024 Water Quality Report
High Water Temperature Study
The study presented in this report has important information regarding the City of San Luis water distribution system and our commitment to provide safe and dependable supply of water. We want our customers to understand the continuous efforts we make to improve our water distribution system and pledge to ensure the quality and delivery of our water. Please read the Temperature Data Collection report prepared by Nicklaus Engineering, Inc. for the City of San Luis regarding high water temperature.
Backflow Prevention Program
City of San Luis Water Department is responsible for protecting the public water, which begins at the source, includes the entire water distribution system and service connections, and ends at the point of delivery to the consumer. City of San Luis requires backflow prevention devices for containment of pollution sources.
The Fifth Unregulated Contaminant Monitoring Rule (UCMR5)
The Fifth Unregulated Contaminant Monitoring Rule (UCMR5)” and could provide a brief description on the first page. along the lines of, “What is the Unregulated Contaminant Monitoring Rule (UCMR)? As part of its responsibilities under the Safe Drinking Water Act (SDWA), the U.S. Environmental Protection Agency (EPA) implements Section 1445(a)(2), Monitoring Program for Unregulated Contaminants. SDWA requires that once every five years, EPA issue a list of priority unregulated contaminants to be monitored by certain public water systems across States, Tribes, and Territories. These contaminants may be present in drinking water but are not yet subject to EPA drinking water standards. Under the Unregulated Contaminant Monitoring Rule (UCMR), EPA collects nationally representative drinking water occurrence data to support EPA’s future regulatory determinations and, as appropriate, assist in the development of national primary drinking water regulations (NPDWRs). For each UCMR cycle, EPA establishes a new list of contaminants for monitoring, specifies which systems are required to monitor, identifies the sampling locations, and defines the analytical methods to be used. On December 17, 2021, EPA Administrator Michael Regan signed the final "Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) for Public Water Systems" and the rule was subsequently published in the Federal Register on December 27, 2021 (86 FR 73131). The 5-year UCMR 5 cycle spans 2022 – 2026, with preparations in 2022, sample collection from 2023 – 2025, and completion of data reporting in 2026.
