Community Water System · PWS NN0403033
Leupp-Birdsprings-Tolani Lake NTUA
Operator location Ft Defiance, Navajo Nation - 14% of 57 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 2,100 served per SDWIS.
- 2,100
- People served (this PWS)
- 57
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Leupp-Birdsprings-Tolani Lake NTUA standing, mid SDWIS violation third
14% of 57 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #13,183 of 29,740 among systems serving 500+.
The verdict
Leupp-Birdsprings-Tolani Lake NTUA lands in the middle third by violation volume (57), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 2,100 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #13,183 of 29,740
- Population · /systems
- #11 of 82
- Population · NN
- 57
- Total EPA violations on record
- 14%
- 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
- 614
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 38
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 8 | 2012 |
| TTHM | MR | 4 | 2020 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| Diquat | MR | 3 | 2008 |
| Endothall | MR | 3 | 2008 |
| 2,3,7,8-TCDD | MR | 3 | 2008 |
| Coliform (TCR) | MCL | 3 | 2008 |
| Mercury | MR | 3 | 2008 |
| Glyphosate | MR | 3 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2008 |
| Thallium, Total | MCL | 2 | 2010 |
| Antimony, Total | MCL | 2 | 2010 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2013 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 2004 |
| Revised Total Coliform Rule | TT | 1 | 2017 |
| Revised Total Coliform Rule | Other | 1 | 2016 |
Violation Count vs. the National Corpus
Leupp-Birdsprings-Tolani Lake NTUA has 57 recorded EPA violations, 60% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 40% carry more. 14% of this system's own violations are health-based (8 of 57), and it ranks #13,183 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)
57 Around the middle fewer violations than 40% 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 Leupp-Birdsprings-Tolani Lake NTUA
8 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NN0403033.
Sources: EPA SDWIS
Nationwide peers
57 violations · 2,100 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Leupp-Birdsprings-Tolani Lake 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.