Community Water System · PWS AZ0413348
Green Valley MHP
Operator location Flagstaff, Arizona - 28% of 503 violations are health-based (upper-third health share (> 23%)); groundwater source; 190 served per SDWIS.
- 190
- People served (this PWS)
- 503
- EPA violations (this PWS)
- 139
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Green Valley MHP standing, high SDWIS violation third
28% of 503 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 28% is upper-third health share (> 23%).
The verdict
Green Valley MHP sits in the upper third of the sitemap cohort by violation count (503), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (190; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 28% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 503
- Total EPA violations on record
- 28%
- Health-based (MCL / treatment failure)
- 190
- 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
- 76
- County
- Yavapai
- School/Daycare
- No
- MCL Violations
- 139
- Monitoring Violations
- 296
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 139 | 2025 |
| Arsenic | MR | 108 | 2021 |
| Coliform (TCR) | MR | 96 | 2015 |
| Consumer Confidence Rule | Other | 34 | 2023 |
| Public Notice | Other | 19 | 2025 |
| Lead and Copper Rule | MR | 10 | 2013 |
| Nitrate | MR | 6 | 2006 |
| Revised Total Coliform Rule | MON | 3 | 2024 |
| cis-1,2-Dichloroethylene | MR | 2 | 1998 |
| o-Dichlorobenzene | MR | 2 | 1998 |
| p-Dichlorobenzene | MR | 2 | 1998 |
| 1,1-Dichloroethylene | MR | 2 | 1998 |
| 1,2-Dichloroethane | MR | 2 | 1998 |
| 1,1,1-Trichloroethane | MR | 2 | 1998 |
| 1,2-Dichloropropane | MR | 2 | 1998 |
| Trichloroethylene | MR | 2 | 1998 |
| CHLOROBENZENE | MR | 2 | 1998 |
| Styrene | MR | 2 | 1998 |
| Revised Total Coliform Rule | RPT | 2 | 2021 |
| DICHLOROMETHANE | MR | 2 | 1998 |
| 1,1,2-Trichloroethane | MR | 2 | 1998 |
| Tetrachloroethylene | MR | 2 | 1998 |
| Carbon tetrachloride | MR | 2 | 1998 |
| Benzene | MR | 2 | 1998 |
| Toluene | MR | 2 | 1998 |
| trans-1,2-Dichloroethylene | MR | 2 | 1998 |
| Ethylbenzene | MR | 2 | 1998 |
| 1,2,4-Trichlorobenzene | MR | 1 | 1998 |
| Xylenes, Total | MR | 1 | 1998 |
| Endrin | MR | 1 | 1998 |
Violation Count vs. the National Corpus
Green Valley MHP has 503 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 28% of this system's own violations are health-based (139 of 503), 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)
503 Higher than most more violations than 95% 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
Health-based violations on Green Valley MHP
139 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for AZ0413348.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
503 violations · 190 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.
What to do with Green Valley 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.