Lead In Drinking Water In Arizona
What residents of Arizona need to know about lead in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Arizona Department of Environmental Quality (ADEQ), CDC · Last reviewed: 2025-01-01
Quick Answer
Is lead in drinking water a real concern in Arizona?
Yes, though Arizona's newer construction reduces lead service line prevalence compared to older eastern states. Pre-1986 homes in Phoenix, Tucson, and Flagstaff still have lead solder and older fittings.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily older household plumbing; Arizona has fewer lead service lines than older eastern states due to more recent construction, but pre-1986 homes have lead solder and brass fittings.
What is the main reason residents should care?
Arizona is a relatively newer state in terms of urban development — much of its suburban build-out occurred after the 1986 federal ban on lead materials. However, older neighborhoods in Phoenix, Tucson, Flagstaff, and smaller historic communities have pre-1986 plumbing with lead concerns.
Key Facts
| Federal Lead Action Level | 15 µg/L — zero is the CDC-recognized safe threshold |
| Arizona water chemistry | Hard, mineral-rich water can form protective scale, moderating (not eliminating) lead leaching |
| Construction timing | Much of AZ's suburban development post-dates the 1986 lead materials ban |
| Older area risk | Pre-1986 homes in Phoenix, Tucson, and Flagstaff have lead solder and fittings |
| State oversight | Arizona Department of Environmental Quality (ADEQ) |
Why This Matters in Arizona
Arizona's relatively recent construction boom means fewer lead service lines than older northeastern or midwestern states. However, Arizona has communities where development predates 1986, and lead solder and older fittings remain a concern in older homes. Arizona's generally hard, mineral-rich water can form protective carbonate scale in pipes that moderates — but does not eliminate — lead leaching. ADEQ enforces the Lead and Copper Rule and requires utilities to complete lead service line inventories. Households in pre-1986 homes should still test their tap water and consider certified filtration for drinking and cooking water.
Arizona Utilities With Lead Violation Records
The utilities listed below have at least one lead violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
City of Tucson
Tucson · 732,906 served
City of Mesa
Mesa · 466,000 served
Town of Gilbert
Gilbert · 247,600 served
City of Chandler
Chandler · 247,328 served
City of Scottsdale
Scottsdale · 241,361 served
City of Glendale
Glendale · 234,766 served
City of Peoria
Peoria · 187,676 served
City of Tempe
Tempe · 165,000 served
Epcor - Agua Fria
Surprise · 127,718 served
Town of Queen Creek
Queen Creek · 95,502 served
How Lead Gets Into Drinking Water
Lead service lines
The pipe connecting a home to the water main may be made of lead, especially in pre-1986 construction. Water sitting in these lines can accumulate lead before it reaches the tap.
Lead solder
Lead solder at pipe joints was banned for potable water systems in 1986. Homes built before that date — including significant portions of older Arizona cities — may still have lead solder throughout their plumbing.
Older brass fixtures
Faucets, valves, and fixtures with high lead content were common before the 2014 revision of 'lead-free' standards. Replacing older fixtures at kitchen and drinking taps can meaningfully reduce exposure.
Corrosive water chemistry
Soft, acidic, or low-alkalinity water dissolves lead from plumbing more readily. Utilities use orthophosphate and other corrosion control treatments, but household plumbing after the meter is not within their control.
Who Should Pay Closest Attention
Residents of pre-1986 homes in Phoenix's historic neighborhoods, downtown Tucson, and older sections of Flagstaff and Prescott are most at risk. Households with young children should consider testing regardless of their utility's recent compliance status.
Families with children under six
Pregnant residents
Households in homes built before 1986
Renters who cannot inspect building plumbing
Residents on a confirmed lead service line
Households that had plumbing work done recently (disturbances dislodge protective scale)
How to Check Your Situation in Arizona
- 1
Identify your water utility. Use the ZIP lookup below or browse the Arizona utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open lead violations.
- 3
Contact your utility and ask for your address-level service line material status. Under the federal Lead and Copper Rule Revisions (LCRR), utilities must maintain and provide this information.
- 4
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website.
- 5
Consider testing your tap water at a Arizona Department of Environmental Quality (ADEQ)-certified lab. Your state health department or Arizona Department of Environmental Quality (ADEQ) maintains a list of certified labs.
- 6
If you have young children or are pregnant, install a certified NSF/ANSI 53 or 58 filter at the kitchen tap as a precautionary measure.
Treatment Options
Boiling does not remove lead. Use a certified filter for drinking and cooking water.
NSF/ANSI Standard 53 — Activated Carbon Block
Under-sink or pitcher filters certified to Standard 53 are independently verified to reduce lead. Replace filters on the manufacturer's schedule — an overdue filter may not perform as certified.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to Standard 58 remove 95–99% of lead and a broad range of contaminants. Requires under-sink installation. More comprehensive than Standard 53 for households with multiple contaminant concerns.
Flushing — temporary mitigation only
EPA recommends flushing the cold tap for 30 seconds to 2 minutes if water has sat in pipes for 6+ hours. Not a substitute for certified filtration or service line replacement.
Frequently Asked Questions
Related Pages
Lead — National Overview
All U.S. utilities with lead records
Arizona State Overview
All utilities and water quality data
Nitrate in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 95–99% of lead
Activated Carbon Filter Guide
NSF/ANSI 53 certified options
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
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Arizona Department of Environmental Quality (ADEQ) ↗