Transient Non-Community Water System · PWS AZ0403112
Grand Canyon Caverns
Peach Springs, Arizona 86434 - drinking water served from groundwater sources to 400 people, tracked in EPA SDWIS and UCMR5.
- 400
- People served
- 122
- EPA violations
- 4
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 122 drinking-water violations at Grand Canyon Caverns, 3% of them health-based - below the Arizona per-system average.
- 122
- Total EPA violations on record
- 3%
- Health-based (MCL / treatment failure)
- 400
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Grand Canyon Caverns
Grand Canyon Caverns is a private-owned transient non-community water system that delivers drinking water to 400 residents in Peach Springs, Arizona (Coconino County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 122 total violations for this system , of which 4 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 115 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.
The most frequently cited contaminant at this system is Coliform (TCR), recorded in 81 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).
Grand Canyon Caverns's 122 violations sit below the Arizona average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 14
- County
- Coconino
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 115
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 81 | 2015 |
| Nitrate | MR | 9 | 2011 |
| Lead and Copper Rule | MR | 3 | 2009 |
| Chlorine | MR | 2 | 2006 |
| Coliform (TCR) | MCL | 2 | 2011 |
| E. COLI | MR | 2 | 2015 |
| Groundwater Rule | TT | 2 | 2022 |
| Revised Total Coliform Rule | RPT | 1 | 2017 |
| 1,1,2-Trichloroethane | MR | 1 | 1987 |
| p-Dichlorobenzene | MR | 1 | 1987 |
| 1,2-Dichloropropane | MR | 1 | 1987 |
| Trichloroethylene | MR | 1 | 1987 |
| trans-1,2-Dichloroethylene | MR | 1 | 1987 |
| Toluene | MR | 1 | 1987 |
| CHLOROBENZENE | MR | 1 | 1987 |
| DICHLOROMETHANE | MR | 1 | 1987 |
| Carbon tetrachloride | MR | 1 | 1987 |
| Benzene | MR | 1 | 1987 |
| Ethylbenzene | MR | 1 | 1987 |
| 1,1-Dichloroethylene | MR | 1 | 1987 |
| Styrene | MR | 1 | 1987 |
| 1,1,1-Trichloroethane | MR | 1 | 1987 |
| o-Dichlorobenzene | MR | 1 | 1987 |
| cis-1,2-Dichloroethylene | MR | 1 | 1987 |
| Tetrachloroethylene | MR | 1 | 1987 |
| 1,2-Dichloroethane | MR | 1 | 1987 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Grand Canyon Caverns.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID AZ0403112 on SDWISSource: EPA SDWIS Federal Reports Search
Arizona Drinking Water Authority
Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Grand Canyon Caverns under EPA-delegated authority.
Open AZ regulator portalViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2022 | Groundwater Rule | TT | 2 | SDWIS / AZ0403112 / 0700 |
| 2017 | Revised Total Coliform Rule | RPT | 1 | SDWIS / AZ0403112 / 8000 |
| 2015 | Coliform (TCR) | MR | 81 | SDWIS / AZ0403112 / 3100 |
| 2015 | E. COLI | MR | 2 | SDWIS / AZ0403112 / 3014 |
| 2011 | Nitrate | MR | 9 | SDWIS / AZ0403112 / 1040 |
| 2011 | Coliform (TCR) | MCL | 2 | SDWIS / AZ0403112 / 3100 |
| 2009 | Lead and Copper Rule | MR | 3 | SDWIS / AZ0403112 / 5000 |
| 2006 | Chlorine | MR | 2 | SDWIS / AZ0403112 / 0999 |
| 1987 | 1,1,2-Trichloroethane | MR | 1 | SDWIS / AZ0403112 / 2985 |
| 1987 | p-Dichlorobenzene | MR | 1 | SDWIS / AZ0403112 / 2969 |
| 1987 | 1,2-Dichloropropane | MR | 1 | SDWIS / AZ0403112 / 2983 |
| 1987 | Trichloroethylene | MR | 1 | SDWIS / AZ0403112 / 2984 |
| 1987 | trans-1,2-Dichloroethylene | MR | 1 | SDWIS / AZ0403112 / 2979 |
| 1987 | Toluene | MR | 1 | SDWIS / AZ0403112 / 2991 |
| 1987 | CHLOROBENZENE | MR | 1 | SDWIS / AZ0403112 / 2989 |
How Grand Canyon Caverns Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Grand Canyon Caverns | Arizona avg | Federal benchmark |
|---|---|---|---|
| Total violations | 122 | 153.3 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 4 | 10.5 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 95.4% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 400 | 4,904 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Grand Canyon Caverns water safe to drink? ▼
How many people does Grand Canyon Caverns serve? ▼
What type of violations does Grand Canyon Caverns have? ▼
Has PFAS been detected in Grand Canyon Caverns water? ▼
What water source does Grand Canyon Caverns use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.