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States → Navajo Nation

Community Water System · PWS NN0400320

Ganado Mission - Sage Memorial Hospital

Ganado, Navajo Nation 86505 - drinking water served from groundwater sources to 349 people, tracked in EPA SDWIS and UCMR5.

349
People served
236
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 236 drinking-water violations at Ganado Mission - Sage Memorial Hospital - above the Navajo Nation per-system average.

236
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
349
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ganado Mission - Sage Memorial Hospital

Ganado Mission - Sage Memorial Hospital is a public/private-owned community water system that delivers drinking water to 349 residents in Ganado, Navajo Nation through 92 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 236 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 196 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 28 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 Navajo Nation, EPA tracks 170 public water systems serving 167,275 people, with 29,535 cumulative violations and 1,366 health-based violations on record. About 100% of systems in the state carry at least one violation, and state-wide the average per system is 173.7 violations. Statewide, 13 of 13 UCMR5-tested systems have reported PFAS detections (100%).

Ganado Mission - Sage Memorial Hospital's 236 violations sit above the Navajo Nation average.

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
349
Total Violations
236
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
92
School/Daycare
No
MCL Violations
0
Monitoring Violations
196
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 28 2012
Nitrate MR 11 2021
Nitrite MR 11 2021
Consumer Confidence Rule Other 8 2022
Revised Total Coliform Rule RPT 7 2025
Total Haloacetic Acids (HAA5) MR 5 2019
TTHM MR 5 2019
Revised Total Coliform Rule MON 5 2017
Arsenic MR 2 1996
Barium MR 2 1996
Cadmium MR 2 1996
Chromium MR 2 1996
Fluoride MR 2 1996
BHC-GAMMA MR 2 1996
Toxaphene MR 2 1996
Dalapon MR 2 1996
Endothall MR 2 1996
Glyphosate MR 2 1996
OXAMYL MR 2 1996
Simazine MR 2 1996
Dinoseb MR 2 1996
Hexachlorocyclopentadiene MR 2 1996
Aldicarb sulfone MR 2 1996
Carbofuran MR 2 1996
Aldicarb MR 2 1996
2,4-D MR 2 1996
2,4,5-TP MR 2 1996
HEXACHLOROBENZENE MR 2 1996
Benzo(a)pyrene MR 2 1996
cis-1,2-Dichloroethylene MR 2 1996

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 Ganado Mission - Sage Memorial Hospital.

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 NN0400320 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Navajo Nation Drinking Water Authority

Navajo Nation'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 NN 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 Revised Total Coliform Rule RPT 7 SDWIS / NN0400320 / 8000
2022 Consumer Confidence Rule Other 8 SDWIS / NN0400320 / 7000
2021 Nitrate MR 11 SDWIS / NN0400320 / 1040
2021 Nitrite MR 11 SDWIS / NN0400320 / 1041
2019 Total Haloacetic Acids (HAA5) MR 5 SDWIS / NN0400320 / 2456
2019 TTHM MR 5 SDWIS / NN0400320 / 2950
2017 Revised Total Coliform Rule MON 5 SDWIS / NN0400320 / 8000
2016 Revised Total Coliform Rule Other 1 SDWIS / NN0400320 / 8000
2012 Coliform (TCR) MR 28 SDWIS / NN0400320 / 3100
2004 Lead and Copper Rule MR 1 SDWIS / NN0400320 / 5000
1996 Arsenic MR 2 SDWIS / NN0400320 / 1005
1996 Barium MR 2 SDWIS / NN0400320 / 1010
1996 Cadmium MR 2 SDWIS / NN0400320 / 1015
1996 Chromium MR 2 SDWIS / NN0400320 / 1020
1996 Fluoride MR 2 SDWIS / NN0400320 / 1025

How Ganado Mission - Sage Memorial Hospital Compares

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

Metric Ganado Mission - Sage Memorial Hospital Navajo Nation avg Federal benchmark
Total violations 236 173.7 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 100% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 349 984 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 170 regulated public water systems in Navajo Nation.

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 Ganado Mission - Sage Memorial Hospital water safe to drink? ▼
Ganado Mission - Sage Memorial Hospital (PWS ID: NN0400320) has 236 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 349 people using Groundwater sources.
How many people does Ganado Mission - Sage Memorial Hospital serve? ▼
Ganado Mission - Sage Memorial Hospital serves 349 people in Ganado, Navajo Nation. It is a Public/Private-owned system using Groundwater water sources with 92 service connections.
What type of violations does Ganado Mission - Sage Memorial Hospital have? ▼
Ganado Mission - Sage Memorial Hospital has 236 total violations: 0 health-based violations (MCL exceedances or treatment failures), 196 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ganado Mission - Sage Memorial Hospital water? ▼
No PFAS testing data is available for Ganado Mission - Sage Memorial Hospital under the EPA's UCMR5 monitoring program.
What water source does Ganado Mission - Sage Memorial Hospital use? ▼
Ganado Mission - Sage Memorial Hospital 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.