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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090400101

Grand Canyon West

Peach Springs, EPA Region 9 — Tribal Water Systems 86434 - drinking water served from groundwater sources to 3,120 people, tracked in EPA SDWIS and UCMR5.

3,120
People served
240
EPA violations
21
Health-based
Untested
UCMR5 result

The verdict

EPA records 240 drinking-water violations at Grand Canyon West, 9% of them health-based.

240
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
3,120
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Grand Canyon West

Grand Canyon West is a native american-owned community water system that delivers drinking water to 3,120 residents in Peach Springs, EPA Region 9 — Tribal Water Systems through 51 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 240 total violations for this system , of which 21 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 149 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 19 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 9 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
3,120
Total Violations
240
Health-Based Violations
21
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
51
School/Daycare
No
MCL Violations
19
Monitoring Violations
149
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 19 2013
Gross Alpha, Excl. Radon and U MR 17 2009
Combined Uranium MR 17 2009
Combined Radium (-226 and -228) MR 17 2009
Lead and Copper Rule MR 15 2022
Coliform (TCR) MR 14 2013
Consumer Confidence Rule Other 13 2011
Nitrate MR 12 2018
Total Haloacetic Acids (HAA5) MR 6 2021
TTHM MR 6 2021
E. COLI MR 5 2013
Public Notice Other 2 2013
Arsenic MR 1 2008
Mercury MR 1 2008
CYANIDE MR 1 2008
Fluoride MR 1 2008
Selenium MR 1 2008
Antimony, Total MR 1 2008
Beryllium, Total MR 1 2008
Thallium, Total MR 1 2008
BHC-GAMMA MR 1 2008
Toxaphene MR 1 2008
Endothall MR 1 2008
Glyphosate MR 1 2008
OXAMYL MR 1 2008
Simazine MR 1 2008
Picloram MR 1 2008
Dinoseb MR 1 2008
Hexachlorocyclopentadiene MR 1 2008
Heptachlor MR 1 2008

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 West.

Federal Source of Truth

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 090400101 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 09 regulator via EPA SDWIS

Violation 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
2023 Lead and Copper Rule TT 1 SDWIS / 090400101 / 5000
2022 Lead and Copper Rule MR 15 SDWIS / 090400101 / 5000
2021 Total Haloacetic Acids (HAA5) MR 6 SDWIS / 090400101 / 2456
2021 TTHM MR 6 SDWIS / 090400101 / 2950
2018 Nitrate MR 12 SDWIS / 090400101 / 1040
2018 Groundwater Rule TT 1 SDWIS / 090400101 / 0700
2016 Revised Total Coliform Rule Other 1 SDWIS / 090400101 / 8000
2013 Coliform (TCR) MCL 19 SDWIS / 090400101 / 3100
2013 Coliform (TCR) MR 14 SDWIS / 090400101 / 3100
2013 E. COLI MR 5 SDWIS / 090400101 / 3014
2013 Public Notice Other 2 SDWIS / 090400101 / 7500
2013 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 1 SDWIS / 090400101 / 0600
2011 Consumer Confidence Rule Other 13 SDWIS / 090400101 / 7000
2009 Gross Alpha, Excl. Radon and U MR 17 SDWIS / 090400101 / 4000
2009 Combined Uranium MR 17 SDWIS / 090400101 / 4006

How Grand Canyon West Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Grand Canyon West EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 240 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 21 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,120 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 9 — Tribal Water Systems.

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 West water safe to drink? ▼
Grand Canyon West (PWS ID: 090400101) has 240 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,120 people using Groundwater sources.
How many people does Grand Canyon West serve? ▼
Grand Canyon West serves 3,120 people in Peach Springs, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 51 service connections.
What type of violations does Grand Canyon West have? ▼
Grand Canyon West has 240 total violations: 21 health-based violations (MCL exceedances or treatment failures), 149 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Grand Canyon West water? ▼
No PFAS testing data is available for Grand Canyon West under the EPA's UCMR5 monitoring program.
What water source does Grand Canyon West use? ▼
Grand Canyon West uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

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.