Transient Non-Community Water System · PWS AZ0405008
Mt Graham Cabin Owners Assoc
Operator location Thatcher, Arizona - smaller served population (≤ 999) at 140 people served; 68 SDWIS violations on record from groundwater sources.
- 140
- People served (this PWS) Smaller third of systems
- 68
- EPA violations (this PWS) Middle third of systems
- 2
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Mt Graham Cabin Owners Assoc standing, mid SDWIS violation third
140 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%).
The verdict
Mt Graham Cabin Owners Assoc lands in the middle third by violation volume (68), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (140; 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.
- 68
- Total EPA violations on record
- 3%
- Health-based (MCL / treatment failure)
- 140
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Transient Non-Community
- Owner Type
- Public/Private
- Connections
- 75
- County
- Graham
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 55
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 28 | 2019 |
| Coliform (TCR) | MR | 11 | 2015 |
| Revised Total Coliform Rule | MON | 8 | 2023 |
| Revised Total Coliform Rule | RPT | 5 | 2020 |
| Revised Total Coliform Rule | TT | 2 | 2020 |
| Mercury | MR | 1 | 1987 |
| Chromium | MR | 1 | 1987 |
| Selenium | MR | 1 | 1987 |
| Barium | MR | 1 | 1987 |
| Fluoride | MR | 1 | 1987 |
| Arsenic | MR | 1 | 1987 |
| Cadmium | MR | 1 | 1987 |
| E. COLI | MR | 1 | 2025 |
Violation Count vs. the National Corpus
Mt Graham Cabin Owners Assoc has 68 recorded EPA violations, 64% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 35% carry more. 3% of this system's own violations are health-based (2 of 68), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
68 Around the middle fewer violations than 35% 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
How many violations vs. how serious, among peer systems
Mt Graham Cabin Owners Assoc plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
Population served record for Mt Graham Cabin Owners Assoc
EPA SDWIS lists 140 people served and 75 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
68 violations · 140 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.
What to do with Mt Graham Cabin Owners Assoc
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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.