City of Scottsdale
EPA ID: AZ0407098 · 241,361 people served · 23 ZIP codes
Looking at the EPA enforcement file for City of Scottsdale, 3 violations are listed as unresolved — those findings cover the utility's service area of approximately 241,361 people and remain open in the federal compliance system, awaiting formal corrective action documentation.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Scottsdale Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Scottsdale serves a community with a median household income of $105,288 and an estimated 512,852 residents across its service area.
🌊 Where Does Your Water Come From?
City of Scottsdale's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in Maricopa County, Arizona rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How City of Scottsdale compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 8 mg/L exceeds the EPA maximum of mg/L.
Chlorite at 5 mg/L exceeds the EPA maximum of 1 mg/L. Anemia and nervous system effects in infants and children. Consider ferrous sulfate reduction filtration.
Revised Total Coliform Rule at 3 presence exceeds the EPA maximum of presence.
Stage 1 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
E. coli at 1 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 40 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.
Chlorite was detected in this water system. ferrous sulfate reduction filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in Arizona
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
City of Scottsdale (EPA ID: AZ0407098) is a community water system in Arizona that serves approximately 241,361 people from surface water sources.
This system provides water to 23 ZIP codes across 8 communities.
Average Home Safety Score: B (77/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| March 1, 2025 | Chlorite | Monitoring | Resolved |
| September 1, 2024 | Chlorite | Monitoring | Resolved |
| August 1, 2024 | Chlorite | Monitoring | Resolved |
| July 1, 2024 | Chlorite | Monitoring | Resolved |
| June 23, 2024 | Contaminant 0700 | Health-based | Resolved |
| April 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| January 1, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| July 1, 2023 | Chlorite | Monitoring | Unresolved |
| July 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| May 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| February 1, 2023 | Consumer Confidence Report Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 8 | No |
| Chlorite | Disinfection Byproducts | 5 | No |
| Revised Total Coliform Rule | Microbiological | 3 | No |
| Stage 1 DBP Rule | Treatment Failure | 2 | No |
| Barium | Inorganic | 1 | No |
| E. coli | Microbiological | 1 | No |
| Contaminant 0700 | Other Violation | 1 | Yes |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 85250 | 0.0023 mg/L | No | N/A |
| 85251 | 0.0023 mg/L | No | N/A |
| 85252 | 0.0023 mg/L | No | N/A |
| 85254 | 0.0023 mg/L | No | N/A |
| 85255 | 0.0023 mg/L | No | N/A |
| 85256 | 0.0023 mg/L | No | N/A |
| 85257 | 0.0023 mg/L | No | N/A |
| 85258 | 0.0023 mg/L | No | N/A |
| 85259 | 0.0023 mg/L | No | N/A |
| 85260 | 0.0023 mg/L | No | N/A |
| 85261 | 0.0023 mg/L | No | N/A |
| 85262 | 0.0023 mg/L | No | N/A |
| 85266 | 0.0023 mg/L | No | N/A |
| 85267 | 0.0023 mg/L | No | N/A |
| 85271 | 0.0023 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 18 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 5 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 85018 — Phoenix
- 85050 — Phoenix
- 85250 — Scottsdale
- 85251 — Scottsdale
- 85252 — Scottsdale
- 85253 — Paradise Valley
- 85254 — Scottsdale
- 85255 — Scottsdale
- 85256 — Scottsdale
- 85257 — Scottsdale
- 85258 — Scottsdale
- 85259 — Scottsdale
- 85260 — Scottsdale
- 85261 — Scottsdale
- 85262 — Scottsdale
- 85264 — Fort Mcdowell
- 85266 — Scottsdale
- 85267 — Scottsdale
- 85268 — Fountain Hills
- 85271 — Scottsdale
- 85281 — Tempe
- 85331 — Cave Creek
- 85377 — Carefree
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Scottsdale (AZ0407098) on EPA.gov.
Frequently Asked Questions
Is City of Scottsdale water safe to drink?
City of Scottsdale has recorded 1 health-based violation in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does City of Scottsdale serve?
City of Scottsdale serves approximately 241,361 people across 23 ZIP codes in Arizona.
Where does City of Scottsdale get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
- #17 / 50 Highest Exposure Burden (Arizona)
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
City of Scottsdale (EPA ID: AZ0407098) — request the latest Consumer Confidence Report or ask about specific contaminants.