GRAND CANYON NATIONAL PARK: EPA violation history, explained
GRAND CANYON NATIONAL PARK had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 16,590 people through 630 service connections.
How this compares nationally
Out of 12,903 systems in this dataset, GRAND CANYON NATIONAL PARK ranks 1,670th by violation burden (87th percentile) - 277 violations total, 11 health-baseds.
How GRAND CANYON NATIONAL PARK compares within AZ
GRAND CANYON NATIONAL PARK's 11 health-based violations sit above the AZ average of 8.2, across 199 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for GRAND CANYON NATIONAL PARK is from 2026-07-11 (health-based: 2025-05-10). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
GRAND CANYON NATIONAL PARK's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Groundwater Rule; Surface Water Treatment Rule
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
GRAND CANYON NATIONAL PARK's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and GRAND CANYON NATIONAL PARK's customers' taps is household plumbing, invisible to a system-level record ranked 1,670th of 12,903 by violation count. The guide to what this data misses covers that gap.