Community Water System · PWS OR4100073
Baker City
Operator location Baker City, Oregon - 0% of 165 violations are health-based (lower-third health share (≤ 1%)); surface water source; 10,349 served per SDWIS.
- 10,349
- People served (this PWS) Larger third of systems
- 165
- EPA violations (this PWS) Upper third of systems
- 0
- Health-based (this PWS) Lower third by health-based share
- No PFAS
- UCMR5 (this PWS) Tested, none detected
Baker City standing, high SDWIS violation third
0% of 165 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: UCMR5 tested, none detected. Population rank #4,551 of 29,740 among systems serving 500+.
The verdict
Baker City sits in the upper third of the sitemap cohort by violation count (165), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (10,349; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #4,551 of 29,740
- Population · /systems
- #60 of 373
- Population · OR
- 165
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 4,500
- County
- Baker
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 160
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 11 | 2011 |
| Surface Water Treatment Rule | MR | 11 | 2009 |
| TTHM | MR | 6 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2023 |
| Arsenic | MR | 4 | 2007 |
| cis-1,2-Dichloroethylene | MR | 4 | 2007 |
| DICHLOROMETHANE | MR | 4 | 2007 |
| o-Dichlorobenzene | MR | 4 | 2007 |
| 1,1-Dichloroethylene | MR | 4 | 2007 |
| Trichloroethylene | MR | 4 | 2007 |
| Tetrachloroethylene | MR | 4 | 2007 |
| CHLOROBENZENE | MR | 4 | 2007 |
| Benzene | MR | 4 | 2007 |
| Toluene | MR | 4 | 2007 |
| Ethylbenzene | MR | 4 | 2007 |
| Styrene | MR | 4 | 2007 |
| p-Dichlorobenzene | MR | 4 | 2007 |
| Vinyl chloride | MR | 4 | 2007 |
| trans-1,2-Dichloroethylene | MR | 4 | 2007 |
| Carbon tetrachloride | MR | 4 | 2007 |
| 1,2-Dichloropropane | MR | 4 | 2007 |
| Xylenes, Total | MR | 4 | 2007 |
| 1,2-Dichloroethane | MR | 4 | 2007 |
| 1,1,1-Trichloroethane | MR | 4 | 2007 |
| 1,1,2-Trichloroethane | MR | 4 | 2007 |
| Revised Total Coliform Rule | MON | 4 | 2024 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2007 |
| Nitrate | MR | 3 | 2007 |
| Consumer Confidence Rule | Other | 3 | 2024 |
| Endothall | MR | 1 | 2002 |
Violation Count vs. the National Corpus
Baker City has 165 recorded EPA violations, 82% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 0% of this system's own violations are health-based (0 of 165), and it ranks #4,551 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)
165 Higher than most more violations than 82% 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
How many violations vs. how serious, among peer systems
Baker City plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFPeS | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFUnA | 8/13/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/13/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 8/13/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFOS | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 8/13/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFEESA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 8/13/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFDA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 8/13/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 4/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 4/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 4/24/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 4/24/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 4/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 4/24/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFOS | 4/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/24/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMBA | 4/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Baker City
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OR4100073.
Sources: EPA SDWIS
Nationwide peers
165 violations · 10,349 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.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Baker City
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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.