GRAND CANYON NATIONAL PARK
PWSID: AZ0403702 · Grand Canyon, AZ · Serves 16,590 people
GRAND CANYON NATIONAL PARK has 12 health-based violations out of 12 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
GRAND CANYON NATIONAL PARK (PWSID AZ0403702) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 16,590 people in Grand Canyon, AZ, and is subject to primacy enforcement by the Arizona drinking-water program.
The system's federal compliance record contains 12 total violations, with 12 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including Fluoride, Total Trihalomethanes (TTHM), Gross Alpha. Recorded violations span 1992–2024.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Arizona state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- AZ0403702
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Grand Canyon, AZ
- Population Served
- 16,590
- Health Violations
- Yes (12)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Fluoride | 6 | 6 |
| Total Trihalomethanes (TTHM) | 4 | 4 |
| Gross Alpha | 1 | 1 |
| Arsenic | 1 | 1 |
Violation History (12)
| Contaminant | Health | Date |
|---|---|---|
| Gross Alpha | Yes | Oct 17, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2024 |
| Fluoride | Yes | Jul 1, 2022 |
| Fluoride | Yes | Jul 1, 2022 |
| Fluoride | Yes | Jun 1, 2022 |
| Fluoride | Yes | Jun 1, 2022 |
| Fluoride | Yes | Mar 1, 2022 |
| Fluoride | Yes | Dec 1, 2021 |
| Arsenic | Yes | Jan 1, 1992 |
Frequently Asked Questions
Is GRAND CANYON NATIONAL PARK water safe to drink?
How many people does GRAND CANYON NATIONAL PARK serve?
What violations does GRAND CANYON NATIONAL PARK have?
What contaminants have been found in GRAND CANYON NATIONAL PARK water?
Nearby Water Systems
Explore More
About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.