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Community Water System · PWS NN0403100

Jeddito NTUA

Ft Defiance, Navajo Nation 86504 - drinking water served from groundwater sources to 1,105 people, tracked in EPA SDWIS and UCMR5.

1,105
People served
121
EPA violations
31
Health-based
Untested
UCMR5 result

The verdict

EPA records 121 drinking-water violations at Jeddito NTUA, 26% of them health-based - below the Navajo Nation per-system average.

121
Total EPA violations on record
26%
Health-based (MCL / treatment failure)
1,105
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Jeddito NTUA

Jeddito NTUA is a native american-owned community water system that delivers drinking water to 1,105 residents in Ft Defiance, Navajo Nation through 323 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 121 total violations for this system , of which 31 (26%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 73 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 31 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.

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%).

Jeddito NTUA's 121 violations sit below 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
1,105
Total Violations
121
Health-Based Violations
31
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
323
School/Daycare
No
MCL Violations
31
Monitoring Violations
73
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 31 2015
Coliform (TCR) MR 17 2012
Revised Total Coliform Rule MON 9 2017
Nitrite MR 4 2014
Nitrate MR 4 2014
Total Haloacetic Acids (HAA5) MR 3 2020
TTHM MR 3 2020
Endrin MR 1 2004
Methoxychlor MR 1 2004
Toxaphene MR 1 2004
Diquat MR 1 2004
Endothall MR 1 2004
Glyphosate MR 1 2004
Di(2-ethylhexyl) adipate MR 1 2004
OXAMYL MR 1 2004
Simazine MR 1 2004
Dinoseb MR 1 2004
Hexachlorocyclopentadiene MR 1 2004
Aldicarb sulfoxide MR 1 2004
Aldicarb sulfone MR 1 2004
Carbofuran MR 1 2004
LASSO MR 1 2004
2,3,7,8-TCDD MR 1 2004
Heptachlor MR 1 2004
Heptachlor epoxide MR 1 2004
2,4-D MR 1 2004
2,4,5-TP MR 1 2004
ETHYLENE DIBROMIDE MR 1 2004
Chlordane MR 1 2004
Aldicarb MR 1 2004

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 Jeddito NTUA.

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 NN0403100 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
2020 Total Haloacetic Acids (HAA5) MR 3 SDWIS / NN0403100 / 2456
2020 TTHM MR 3 SDWIS / NN0403100 / 2950
2017 Revised Total Coliform Rule MON 9 SDWIS / NN0403100 / 8000
2016 Revised Total Coliform Rule Other 1 SDWIS / NN0403100 / 8000
2015 Coliform (TCR) MCL 31 SDWIS / NN0403100 / 3100
2014 Nitrite MR 4 SDWIS / NN0403100 / 1041
2014 Nitrate MR 4 SDWIS / NN0403100 / 1040
2012 Coliform (TCR) MR 17 SDWIS / NN0403100 / 3100
2004 Endrin MR 1 SDWIS / NN0403100 / 2005
2004 Methoxychlor MR 1 SDWIS / NN0403100 / 2015
2004 Toxaphene MR 1 SDWIS / NN0403100 / 2020
2004 Diquat MR 1 SDWIS / NN0403100 / 2032
2004 Endothall MR 1 SDWIS / NN0403100 / 2033
2004 Glyphosate MR 1 SDWIS / NN0403100 / 2034
2004 Di(2-ethylhexyl) adipate MR 1 SDWIS / NN0403100 / 2035

How Jeddito NTUA Compares

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

Metric Jeddito NTUA Navajo Nation avg Federal benchmark
Total violations 121 173.7 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 31 8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 100% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,105 984 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 Jeddito NTUA water safe to drink? ▼
Jeddito NTUA (PWS ID: NN0403100) has 121 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,105 people using Groundwater sources.
How many people does Jeddito NTUA serve? ▼
Jeddito NTUA serves 1,105 people in Ft Defiance, Navajo Nation. It is a Native American-owned system using Groundwater water sources with 323 service connections.
What type of violations does Jeddito NTUA have? ▼
Jeddito NTUA has 121 total violations: 31 health-based violations (MCL exceedances or treatment failures), 73 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Jeddito NTUA water? ▼
No PFAS testing data is available for Jeddito NTUA under the EPA's UCMR5 monitoring program.
What water source does Jeddito NTUA use? ▼
Jeddito NTUA 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.