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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090400102

Havasupai Village

Supai, EPA Region 9 — Tribal Water Systems 86435 - drinking water served from groundwater sources to 885 people, tracked in EPA SDWIS and UCMR5.

885
People served
754
EPA violations
17
Health-based
Untested
UCMR5 result

The verdict

EPA records 754 drinking-water violations at Havasupai Village, 2% of them health-based.

754
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
885
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Havasupai Village

Havasupai Village is a native american-owned community water system that delivers drinking water to 885 residents in Supai, EPA Region 9 — Tribal Water Systems through 132 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 754 total violations for this system , of which 17 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 555 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 117 violations (MR). 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
885
Total Violations
754
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
132
School/Daycare
No
MCL Violations
14
Monitoring Violations
555
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 117 2016
Arsenic MR 21 2023
Nitrate MR 16 2021
Arsenic MCL 10 2012
Barium MR 9 2020
Cadmium MR 9 2020
Chromium MR 9 2020
Fluoride MR 9 2020
Mercury MR 9 2020
Antimony, Total MR 9 2020
Beryllium, Total MR 9 2020
Thallium, Total MR 9 2020
Selenium MR 9 2020
CYANIDE MR 8 2020
BHC-GAMMA MR 8 2004
Methoxychlor MR 8 2004
Toxaphene MR 8 2004
Carbofuran MR 8 2004
Atrazine MR 8 2004
LASSO MR 8 2004
Heptachlor MR 8 2004
Heptachlor epoxide MR 8 2004
2,4-D MR 8 2004
2,4,5-TP MR 8 2004
Pentachlorophenol MR 8 2004
Total Polychlorinated Biphenyls (PCB) MR 8 2004
1,2-DIBROMO-3-CHLOROPROPANE MR 8 2004
ETHYLENE DIBROMIDE MR 8 2004
Chlordane MR 8 2004
Lead and Copper Rule MR 7 2020

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 Havasupai Village.

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 090400102 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
2025 Groundwater Rule TT 3 SDWIS / 090400102 / 0700
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / 090400102 / 5200
2023 Arsenic MR 21 SDWIS / 090400102 / 1005
2023 Chlorine MR 3 SDWIS / 090400102 / 0999
2022 Total Haloacetic Acids (HAA5) MR 6 SDWIS / 090400102 / 2456
2022 TTHM MR 6 SDWIS / 090400102 / 2950
2022 Consumer Confidence Rule Other 6 SDWIS / 090400102 / 7000
2021 Nitrate MR 16 SDWIS / 090400102 / 1040
2021 Public Notice Other 2 SDWIS / 090400102 / 7500
2021 Revised Total Coliform Rule MON 2 SDWIS / 090400102 / 8000
2020 Barium MR 9 SDWIS / 090400102 / 1010
2020 Cadmium MR 9 SDWIS / 090400102 / 1015
2020 Chromium MR 9 SDWIS / 090400102 / 1020
2020 Fluoride MR 9 SDWIS / 090400102 / 1025
2020 Mercury MR 9 SDWIS / 090400102 / 1035

How Havasupai Village Compares

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

Metric Havasupai Village EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 754 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 17 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 885 - 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 Havasupai Village water safe to drink? ▼
Havasupai Village (PWS ID: 090400102) has 754 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 885 people using Groundwater sources.
How many people does Havasupai Village serve? ▼
Havasupai Village serves 885 people in Supai, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 132 service connections.
What type of violations does Havasupai Village have? ▼
Havasupai Village has 754 total violations: 17 health-based violations (MCL exceedances or treatment failures), 555 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Havasupai Village water? ▼
No PFAS testing data is available for Havasupai Village under the EPA's UCMR5 monitoring program.
What water source does Havasupai Village use? ▼
Havasupai Village 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.