Water Quality: Grand Canyon, AZ
3 water systems • 18,730 people served
Multiple Health ViolationsWater Quality Summary
Grand Canyon is served by 3 public water systems with a combined service population of 18,730 people, and has 317 EPA Safe Drinking Water Act violations on record. Critically, 12 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Grand Canyon's violation count is 17% below the national average for Arizona. Contaminants associated with violations include Chlorine Dioxide, Fecal Coliform, Stage 2 DBP, TTHM.
Contaminants Found
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Water Systems Serving Grand Canyon
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| GRAND CANYON NATIONAL PARK | AZ0403702 | Groundwater | 16,590 | 169 |
| HYDRO RESOURCES-TUSAYAN | AZ0403312 | Groundwater | 1,710 | 62 |
| GRAND CANYON JUNCTION HYDRO | AZ0403084 | Groundwater | 430 | 86 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Arizona
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.