Latest Testing Results

• EPA Compliance Status: Glendale’s water supply meets federal drinking water standards as of 2026, but significantly exceeds health guidelines for chromium-6 and arsenic, with continuous monitoring for over 100 different contaminants. The city’s most recent Consumer Confidence Report confirms no violations of maximum contaminant levels.
• PFAS Monitoring: EPA PFAS MCLs (4 ppt for PFOA/PFOS) are now in force following the April 2024 final rule, with public water systems required to complete initial monitoring by 2027 and achieve compliance by 2029. Across Arizona, ADEQ’s comprehensive testing programme found approximately 12% of sampled systems exceed at least one EPA PFAS standard. Glendale’s specific PFAS status remains under active monitoring. In May 2025, the EPA announced its intention to revise the PFAS rule — ADEQ is monitoring developments closely. For statewide context, see our Arizona water quality overview.
• Testing Frequency: Glendale conducts comprehensive water quality testing throughout its distribution system, including quarterly sampling for regulated contaminants and proactive monitoring for emerging contaminants including PFAS “forever chemicals.” Results are published annually in the Consumer Confidence Report.

Water Sources

• Salt River Project: Primary surface water source (approximately 60% of supply) from the Salt and Verde River systems, originating from snowmelt and monsoon rains in northeastern and central Arizona, delivered via SRP’s extensive canal system.
• Central Arizona Project: Colorado River water delivered through the Central Arizona Project canal system, providing approximately 25% of the city’s water supply with an annual allocation of 22,732 acre-feet during normal non-drought years.
• Groundwater & Reclaimed Water: Limited groundwater pumping from local aquifers and innovative reclaimed water systems that treat wastewater for reuse in landscaping and aquifer recharge, enhancing water supply resilience in Arizona’s arid climate.

Advanced Treatment Technology

• Pyramid Peak Water Treatment Plant: Jointly operated with Peoria, this recently expanded facility now treats up to 54 million gallons per day — up from a previous reliable capacity of 39 mgd. The expansion, completed with all 14 existing filters replaced within the original budget, processes Colorado River water from the Central Arizona Project canal using multi-barrier treatment including coagulation, flocculation, sedimentation, filtration, and disinfection.
• Salt River Project Direct Service: Areas within SRP service boundaries receive treated water directly from SRP’s system, which utilises state-of-the-art treatment facilities and extensive quality monitoring throughout the distribution network.
• Reclaimed Water Treatment: Advanced wastewater treatment facilities produce high-quality reclaimed water for landscape irrigation and groundwater recharge, reducing demand on potable water supplies while supporting Arizona’s long-term sustainability goals.

Infrastructure Modernisation

• Pyramid Peak Expansion Complete: The joint expansion with Peoria — totalling over $52.5 million (Peoria’s share) plus approximately $25 million in shared improvements with Glendale — has been completed, increasing treatment capacity to 54 mgd and replacing all 14 ageing filters on site within budget and schedule.
• Distribution System Renewal: Systematic replacement of ageing water infrastructure, including sewer lines dating to the 1940s, continues with modern materials and smart monitoring technologies to improve system reliability and reduce water loss across Glendale’s network.
• PFAS Treatment Planning: Proactive planning is underway for PFAS monitoring and potential treatment system development aligned with EPA’s 2029 compliance deadline, alongside ongoing assessment for chromium-6 treatment technologies to address documented contamination concerns. See our water filter guide for household solutions available now.

Customer Protection Initiatives

Glendale Water Services maintains a strong commitment to customer service and water quality transparency through comprehensive annual water quality reports, 24/7 customer service availability at 623-930-2770, and expanded water conservation rebate programmes to help residents reduce water usage and costs. The city’s proactive approach includes participation in ADEQ’s statewide PFAS monitoring initiative — part of a programme backed by $5 million in state funding and approximately $63.5 million in federal Bipartisan Infrastructure Law funds. However, residents should be aware of documented concerns: chromium-6 at 5,300–6,400 ppt and arsenic at 1.6–3.1 ppb both meet federal standards while significantly exceeding health guidelines established by toxicologists. Glendale’s strategic water portfolio, combining multiple sources and storage options, provides resilience against drought conditions while supporting the continued growth of this dynamic West Valley community. Check our water alert news for the latest Arizona developments, and our Chandler, Gilbert, Scottsdale, Mesa, and Phoenix pages for comparison across the metro area.