Community Water System · PWS OR4100626
Pilot Rock, City Of
Operator location Pilot Rock, Oregon - 23% of 73 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,326 served per SDWIS.
- 1,326
- People served (this PWS)
- 73
- EPA violations (this PWS)
- 17
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Pilot Rock, City Of standing, mid SDWIS violation third
23% of 73 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 #16,985 of 29,740 among systems serving 500+.
The verdict
Pilot Rock, City Of lands in the middle third by violation volume (73), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,326 (mid served population (≤ 3,309)). 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.
- #16,985 of 29,740
- Population · /systems
- #216 of 373
- Population · OR
- 73
- 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
- Local
- Connections
- 650
- County
- Umatilla
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 53
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 33 | 2014 |
| Coliform (TCR) | MCL | 17 | 2011 |
| Nitrate | MR | 5 | 2011 |
| Consumer Confidence Rule | Other | 2 | 2024 |
| Heptachlor | MR | 1 | 1996 |
| HEXACHLOROBENZENE | MR | 1 | 1996 |
| Simazine | MR | 1 | 1996 |
| Revised Total Coliform Rule | MON | 1 | 2019 |
| E. COLI | MR | 1 | 2024 |
| BHC-GAMMA | MR | 1 | 1996 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Benzo(a)pyrene | MR | 1 | 1996 |
| Atrazine | MR | 1 | 1996 |
| Heptachlor epoxide | MR | 1 | 1996 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 1996 |
| Di(2-ethylhexyl) adipate | MR | 1 | 1996 |
| LASSO | MR | 1 | 1996 |
| Methoxychlor | MR | 1 | 1996 |
Violation Count vs. the National Corpus
Pilot Rock, City Of has 73 recorded EPA violations, 66% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 34% carry more. 23% of this system's own violations are health-based (17 of 73), and it ranks #16,985 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)
73 Around the middle fewer violations than 34% 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 Pilot Rock, City Of
17 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OR4100626.
Sources: EPA SDWIS
Nationwide peers
73 violations · 1,326 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Pilot Rock, 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.