Community Water System · PWS OR4100111
Sun Mountain Water System LLC
Operator location Bend, Oregon - 23% of 31 violations are health-based (upper-third health share (> 23%)); groundwater source; 740 served per SDWIS.
- 740
- People served (this PWS)
- 31
- EPA violations (this PWS)
- 7
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Sun Mountain Water System LLC standing, mid SDWIS violation third
23% of 31 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 23% is upper-third health share (> 23%). Population rank #23,661 of 29,740 among systems serving 500+.
The verdict
Sun Mountain Water System LLC lands in the middle third by violation volume (31), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (740; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 23% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #23,661 of 29,740
- Population · /systems
- #298 of 373
- Population · OR
- 31
- Total EPA violations on record
- 23%
- 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
- Private
- Connections
- 298
- County
- Deschutes
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 18
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 8 | 2021 |
| Coliform (TCR) | MCL | 7 | 2013 |
| Coliform (TCR) | MR | 4 | 2013 |
| Consumer Confidence Rule | Other | 4 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1996 |
| Lead and Copper Rule | MR | 2 | 2021 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Revised Total Coliform Rule | MON | 1 | 2023 |
Violation Count vs. the National Corpus
Sun Mountain Water System LLC has 31 recorded EPA violations, 43% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 56% carry more. 23% of this system's own violations are health-based (7 of 31), and it ranks #23,661 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)
31 Lower than most fewer violations than 56% 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 Sun Mountain Water System LLC
7 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OR4100111.
Sources: EPA SDWIS
Nationwide peers
31 violations · 740 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Sun Mountain Water System LLC
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Oregon compares on the same EPA violation measures. Oregon 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.