Non-Transient Non-Community Water System · PWS AZ0420336
Vail School District - Elementary School
Operator location Vail, Arizona - upper-third violation load (> 74 violations) with 77 EPA violations; groundwater source; 1,680 served (PWS-level, not municipal population).
- 1,680
- People served (this PWS)
- 77
- EPA violations (this PWS)
- 10
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Vail School District - Elementary School standing, high SDWIS violation third
77 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 13% is middle-third health share (≤ 23%). Population rank #14,992 of 29,740 among systems serving 500+.
The verdict
Vail School District - Elementary School sits in the upper third of the sitemap cohort by violation count (77), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,680 (mid served population (≤ 3,309)). Health-based share is 13% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #14,992 of 29,740
- Population · /systems
- #212 of 413
- Population · AZ
- 77
- Total EPA violations on record
- 13%
- 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
- Non-Transient Non-Community
- Owner Type
- Public/Private
- Connections
- 10
- County
- Pima
- School/Daycare
- Yes
- MCL Violations
- 6
- Monitoring Violations
- 57
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 18 | 2013 |
| Chlorine | MR | 18 | 2016 |
| Nitrate | MR | 6 | 2006 |
| Coliform (TCR) | MCL | 6 | 2011 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| Revised Total Coliform Rule | MON | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Lead and Copper Rule | MR | 2 | 2013 |
| Arsenic | MR | 1 | 1990 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2025 |
| Mercury | MR | 1 | 1990 |
| Fluoride | MR | 1 | 1990 |
| Cadmium | MR | 1 | 1990 |
| Chromium | MR | 1 | 1990 |
| Selenium | MR | 1 | 1990 |
| TTHM | MR | 1 | 2025 |
| Barium | MR | 1 | 1990 |
Violation Count vs. the National Corpus
Vail School District - Elementary School has 77 recorded EPA violations, 67% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 32% carry more. 13% of this system's own violations are health-based (10 of 77), and it ranks #14,992 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)
77 Around the middle fewer violations than 32% 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
SDWIS compliance record for Vail School District - Elementary School
77 violations on record for AZ0420336; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
77 violations · 1,680 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 Vail School District - Elementary School
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arizona compares on the same EPA violation measures. Arizona 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.