Community Water System · PWS NN0403100
Jeddito NTUA
Operator location Ft Defiance, Navajo Nation - 26% of 121 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,105 served per SDWIS.
- 1,105
- People served (this PWS)
- 121
- EPA violations (this PWS)
- 31
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Jeddito NTUA standing, high SDWIS violation third
26% of 121 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%). Population rank #18,534 of 29,740 among systems serving 500+.
The verdict
Jeddito NTUA sits in the upper third of the sitemap cohort by violation count (121), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,105 (mid served population (≤ 3,309)). Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #18,534 of 29,740
- Population · /systems
- #40 of 82
- Population · NN
- 121
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
Jeddito NTUA has 121 recorded EPA violations, 77% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 23% carry more. 26% of this system's own violations are health-based (31 of 121), and it ranks #18,534 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
121 Higher than most more violations than 77% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Jeddito NTUA
31 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NN0403100.
Sources: EPA SDWIS
Nationwide peers
121 violations · 1,105 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Jeddito NTUA
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Navajo Nation compares on the same EPA violation measures. Navajo Nation systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.