GRAND CANYON NATIONAL PARK vs PHOENIX CITY OF
Water quality comparison — risk levels, violations, PFAS records, and contaminants
Quick Answer
PHOENIX CITY OF has a lower risk classification (safe). GRAND CANYON NATIONAL PARK has 0 open health-based violations and 29 PFAS records. PHOENIX CITY OF has 0 open health-based violations and 1512 PFAS records.
Arizona · AZ0403702
Low Concern
Minor detections below regulatory limits. Routine monitoring adequate.
0
Open violations
29
PFAS records
Arizona · AZ0407025
No Concerns Detected
Water meets all safety standards with no detected exceedances.
0
Open violations
1512
PFAS records
Head-to-Head Comparison
| Metric | GRAND CANYON NATIONAL PARK | PHOENIX CITY OF |
|---|---|---|
| State | Arizona | Arizona |
| Risk Level | Low Concern | No Concerns Detected |
| Population Served | 16,590 | 1,695,000 |
| Open Health Violations | 0 | 0 |
| Total Violations | 108 | 6 |
| PFAS Records | 29 | 1512 |
| Ownership | Federal | Local |
| Service Type | Groundwater | Surface water |
| City Served | Grand Canyon | Phoenix |
Contaminants in Violation Records
GRAND CANYON NATIONAL PARK
- Coliform (TCR)
- Bromate
- Total Trihalomethanes (TTHMs)
- Haloacetic Acids (HAA5)
- Nitrate
- Lead
PHOENIX CITY OF
- Total Coliform
- Cryptosporidium
- Coliform (TCR)
Key Differences
GRAND CANYON NATIONAL PARK has a low risk rating vs. safe for PHOENIX CITY OF.
GRAND CANYON NATIONAL PARK has 29 PFAS records vs. 1512 for PHOENIX CITY OF.
What Should I Do?
If either utility shows open violations or elevated PFAS records, consider:
- Installing a reverse osmosis filter — removes PFAS, lead, arsenic, nitrates, and most heavy metals.
- Requesting your utility’s annual Consumer Confidence Report (CCR) for the most current test results.
- Ordering a certified lab water test if you want contaminant-specific data for your address.
Frequently Asked Questions
Which is safer — GRAND CANYON NATIONAL PARK or PHOENIX CITY OF?
PHOENIX CITY OF has a lower risk classification (safe). PHOENIX CITY OF has 0 open health-based violations compared to 0 for the other system.
What does "open health-based violation" mean?
An open health-based violation means a water system has exceeded an EPA Maximum Contaminant Level (MCL) or failed to meet a treatment technique — and the violation has not yet been resolved. These are the most serious type of water quality violations.
How current is this data?
Violation data comes from EPA's Safe Drinking Water Information System (SDWIS), which is updated as utilities report. PFAS data comes from EPA's UCMR 5 monitoring (2023–2025). Risk levels are recalculated daily.
What does PWSID mean?
PWSID stands for Public Water System ID — a unique federal identifier assigned to each community water system. You can use it to look up a system in EPA's ECHO database.