Community Water System · PWS AZ0407307
Adjc Adobe Mountain School
Operator location Phoenix, Arizona - smaller served population (≤ 999) at 680 people served; 216 SDWIS violations on record from groundwater sources.
- 680
- People served (this PWS)
- 216
- EPA violations (this PWS)
- 6
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Adjc Adobe Mountain School standing, high SDWIS violation third
680 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 #24,716 of 29,740 among systems serving 500+.
The verdict
Adjc Adobe Mountain School sits in the upper third of the sitemap cohort by violation count (216), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (680; 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.
- #24,716 of 29,740
- Population · /systems
- #342 of 413
- Population · AZ
- 216
- 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
- State
- Connections
- 40
- County
- Maricopa
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 172
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 31 | 2022 |
| Consumer Confidence Rule | Other | 21 | 2022 |
| Arsenic | MR | 17 | 2015 |
| Nitrate | MR | 13 | 2017 |
| Coliform (TCR) | MR | 13 | 2013 |
| TTHM | MR | 7 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2012 |
| Lead and Copper Rule | MR | 5 | 2020 |
| Mercury | MR | 4 | 1998 |
| Selenium | MR | 4 | 1998 |
| Chromium | MR | 4 | 1998 |
| Barium | MR | 4 | 1998 |
| Cadmium | MR | 4 | 1998 |
| Fluoride | MR | 4 | 1998 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| Dalapon | MR | 2 | 2001 |
| Arsenic | MCL | 2 | 2007 |
| Public Notice | Other | 2 | 2024 |
| Antimony, Total | MR | 1 | 1998 |
| 1,2,4-Trichlorobenzene | MR | 1 | 1998 |
| DICHLOROMETHANE | MR | 1 | 1998 |
| o-Dichlorobenzene | MR | 1 | 1998 |
| p-Dichlorobenzene | MR | 1 | 1998 |
| 1,2-Dichloroethane | MR | 1 | 1998 |
| 1,1,1-Trichloroethane | MR | 1 | 1998 |
| Carbon tetrachloride | MR | 1 | 1998 |
| Trichloroethylene | MR | 1 | 1998 |
| 1,1,2-Trichloroethane | MR | 1 | 1998 |
| CHLOROBENZENE | MR | 1 | 1998 |
Violation Count vs. the National Corpus
Adjc Adobe Mountain School has 216 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 3% of this system's own violations are health-based (6 of 216), and it ranks #24,716 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)
216 Higher than most more violations than 86% 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 Adjc Adobe Mountain School
EPA SDWIS lists 680 people served and 40 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
216 violations · 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Adjc Adobe Mountain 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.