Community Water System · PWS NN4900227
Monument Valley Utah Schools
Operator location Blanding, Navajo Nation - smaller served population (≤ 999) at 700 people served; 303 SDWIS violations on record from groundwater sources.
- 700
- People served (this PWS)
- 303
- EPA violations (this PWS)
- 10
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Monument Valley Utah Schools standing, high SDWIS violation third
700 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 3% is middle-third health share (≤ 23%). Population rank #24,383 of 29,740 among systems serving 500+.
The verdict
Monument Valley Utah Schools sits in the upper third of the sitemap cohort by violation count (303), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (700; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 3% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #24,383 of 29,740
- Population · /systems
- #72 of 82
- Population · NN
- 303
- Total EPA violations on record
- 3%
- 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
- Local
- Connections
- 42
- School/Daycare
- Yes
- MCL Violations
- 7
- Monitoring Violations
- 250
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 36 | 2014 |
| Consumer Confidence Rule | Other | 12 | 2024 |
| Nitrate | MR | 7 | 2010 |
| Coliform (TCR) | MCL | 7 | 2011 |
| E. COLI | MR | 6 | 2017 |
| CYANIDE | MR | 3 | 2008 |
| Mercury | MR | 3 | 2008 |
| Selenium | MR | 3 | 2008 |
| Beryllium, Total | MR | 3 | 2008 |
| Thallium, Total | MR | 3 | 2008 |
| Methoxychlor | MR | 3 | 2008 |
| Toxaphene | MR | 3 | 2008 |
| Dalapon | MR | 3 | 2008 |
| Diquat | MR | 3 | 2008 |
| Glyphosate | MR | 3 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2008 |
| OXAMYL | MR | 3 | 2008 |
| Simazine | MR | 3 | 2008 |
| Picloram | MR | 3 | 2008 |
| Hexachlorocyclopentadiene | MR | 3 | 2008 |
| Atrazine | MR | 3 | 2008 |
| LASSO | MR | 3 | 2008 |
| 2,3,7,8-TCDD | MR | 3 | 2008 |
| HEXACHLOROBENZENE | MR | 3 | 2008 |
| Pentachlorophenol | MR | 3 | 2008 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 2008 |
| ETHYLENE DIBROMIDE | MR | 3 | 2008 |
| Xylenes, Total | MR | 3 | 2008 |
| DICHLOROMETHANE | MR | 3 | 2008 |
| o-Dichlorobenzene | MR | 3 | 2008 |
Violation Count vs. the National Corpus
Monument Valley Utah Schools has 303 recorded EPA violations, 91% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 9% carry more. 3% of this system's own violations are health-based (10 of 303), and it ranks #24,383 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)
303 Higher than most more violations than 91% 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
Population served record for Monument Valley Utah Schools
EPA SDWIS lists 700 people served and 42 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
303 violations · 700 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Monument Valley Utah Schools
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.