Community Water System · PWS AZ0409300
Timberline MHP
Operator location Orem, Arizona - smaller served population (≤ 999) at 350 people served; 58 SDWIS violations on record from groundwater sources.
- 350
- People served (this PWS)
- 58
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Timberline MHP standing, mid SDWIS violation third
350 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 7% is middle-third health share (≤ 23%).
The verdict
Timberline MHP lands in the middle third by violation volume (58), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (350; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 7% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 58
- Total EPA violations on record
- 7%
- Health-based (MCL / treatment failure)
- 350
- 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.
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 125
- County
- Navajo
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 39
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 9 | 2015 |
| Nitrate | MR | 6 | 2019 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2023 |
| TTHM | MR | 3 | 2023 |
| Revised Total Coliform Rule | RPT | 2 | 2018 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| Selenium | MR | 2 | 1987 |
| Cadmium | MR | 2 | 1987 |
| Arsenic | MR | 2 | 1987 |
| Fluoride | MR | 2 | 1987 |
| Consumer Confidence Rule | Other | 2 | 2025 |
| Mercury | MR | 2 | 1987 |
| Chromium | MR | 2 | 1987 |
| Barium | MR | 2 | 1987 |
| Revised Total Coliform Rule | MON | 2 | 2023 |
| Lead and Copper Rule | MR | 1 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1980 |
| Public Notice | Other | 1 | 2024 |
Violation Count vs. the National Corpus
Timberline MHP has 58 recorded EPA violations, 60% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 39% carry more. 7% of this system's own violations are health-based (4 of 58), 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)
58 Around the middle fewer violations than 39% 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 Timberline MHP
EPA SDWIS lists 350 people served and 125 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
58 violations · 350 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 Timberline MHP
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.