Community Water System · PWS OR4100845
Sumpter, City Of
Operator location Sumpter, Oregon - smaller served population (≤ 999) at 208 people served; 385 SDWIS violations on record from surface water sources.
- 208
- People served (this PWS)
- 385
- EPA violations (this PWS)
- 38
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Sumpter, City Of standing, high SDWIS violation third
208 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 10% is middle-third health share (≤ 23%).
The verdict
Sumpter, City Of sits in the upper third of the sitemap cohort by violation count (385), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (208; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 10% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 385
- Total EPA violations on record
- 10%
- Health-based (MCL / treatment failure)
- 208
- 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
- 299
- County
- Baker
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 332
- Treatment Tech Violations
- 32
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 175 | 2024 |
| Coliform (TCR) | MR | 42 | 2012 |
| Surface Water Treatment Rule | TT | 27 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | MR | 22 | 2022 |
| TTHM | MR | 14 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 14 | 2025 |
| Nitrate | MR | 5 | 2019 |
| Coliform (TCR) | MCL | 5 | 1997 |
| Arsenic | MR | 5 | 2011 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 3 | 2019 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2017 |
| Revised Total Coliform Rule | MON | 2 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | TT | 2 | 2019 |
| Public Notice | Other | 2 | 2019 |
| Dalapon | MR | 1 | 2017 |
| Diquat | MR | 1 | 2017 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2017 |
| Simazine | MR | 1 | 2017 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2017 |
| Dinoseb | MR | 1 | 2017 |
| 2,4-D | MR | 1 | 2017 |
| 2,4,5-TP | MR | 1 | 2017 |
| Benzo(a)pyrene | MR | 1 | 2017 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2017 |
| ETHYLENE DIBROMIDE | MR | 1 | 2017 |
| cis-1,2-Dichloroethylene | MR | 1 | 2019 |
| Vinyl chloride | MR | 1 | 2019 |
| trans-1,2-Dichloroethylene | MR | 1 | 2019 |
| 1,1,1-Trichloroethane | MR | 1 | 2019 |
| 1,1,2-Trichloroethane | MR | 1 | 2019 |
Violation Count vs. the National Corpus
Sumpter, City Of has 385 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 10% of this system's own violations are health-based (38 of 385), 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)
385 Higher than most more violations than 93% 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 Sumpter, City Of
EPA SDWIS lists 208 people served and 299 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
385 violations · 208 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 Sumpter, 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.