Community Water System · PWS OR4100491
Lostine, City Of
Operator location Lostine, Oregon - smaller served population (≤ 999) at 350 people served; 131 SDWIS violations on record from groundwater sources.
- 350
- People served (this PWS)
- 131
- EPA violations (this PWS)
- 3
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lostine, City Of standing, high 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 2% is middle-third health share (≤ 23%).
The verdict
Lostine, City Of sits in the upper third of the sitemap cohort by violation count (131), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (350; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 2% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 131
- Total EPA violations on record
- 2%
- 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
- Local
- Connections
- 154
- County
- Wallowa
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 119
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 29 | 2009 |
| Groundwater Rule | MR | 15 | 2025 |
| Nitrate | MR | 13 | 2025 |
| Consumer Confidence Rule | Other | 3 | 2025 |
| Lead and Copper Rule | MR | 3 | 2005 |
| Coliform (TCR) | MCL | 3 | 2013 |
| Carbon tetrachloride | MR | 1 | 1999 |
| DICHLOROMETHANE | MR | 1 | 1999 |
| Ethylbenzene | MR | 1 | 1999 |
| Tetrachloroethylene | MR | 1 | 1999 |
| o-Dichlorobenzene | MR | 1 | 1999 |
| Styrene | MR | 1 | 1999 |
| trans-1,2-Dichloroethylene | MR | 1 | 1999 |
| 2,4,5-TP | MR | 1 | 1999 |
| LASSO | MR | 1 | 1999 |
| Atrazine | MR | 1 | 1999 |
| Benzo(a)pyrene | MR | 1 | 1999 |
| Carbofuran | MR | 1 | 1999 |
| Dalapon | MR | 1 | 1999 |
| Endrin | MR | 1 | 1999 |
| ETHYLENE DIBROMIDE | MR | 1 | 1999 |
| Glyphosate | MR | 1 | 1999 |
| HEXACHLOROBENZENE | MR | 1 | 1999 |
| Pentachlorophenol | MR | 1 | 1999 |
| Picloram | MR | 1 | 1999 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 1999 |
| Simazine | MR | 1 | 1999 |
| OXAMYL | MR | 1 | 1999 |
| Arsenic | MR | 1 | 1999 |
| Antimony, Total | MR | 1 | 1999 |
Violation Count vs. the National Corpus
Lostine, City Of has 131 recorded EPA violations, 79% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 21% carry more. 2% of this system's own violations are health-based (3 of 131), 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)
131 Higher than most more violations than 79% 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 Lostine, City Of
EPA SDWIS lists 350 people served and 154 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
131 violations · 350 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 Lostine, City Of
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.