Community Water System · PWS OR4100576
North Plains Water Department
Operator location Beaverton, Oregon - 0% of 38 violations are health-based (lower-third health share (≤ 1%)); surface water source; 3,663 served per SDWIS.
- 3,663
- People served (this PWS)
- 38
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
North Plains Water Department standing, mid SDWIS violation third
0% of 38 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%). Population rank #9,357 of 29,740 among systems serving 500+.
The verdict
North Plains Water Department lands in the middle third by violation volume (38), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (3,663; 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. No UCMR5 PFAS test appears for this system in this extract.
- #9,357 of 29,740
- Population · /systems
- #111 of 373
- Population · OR
- 38
- 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.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,749
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 33
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MR | 9 | 2010 |
| Total Haloacetic Acids (HAA5) | MR | 9 | 2010 |
| Lead and Copper Rule | MR | 5 | 1994 |
| Coliform (TCR) | MR | 4 | 2014 |
| Consumer Confidence Rule | Other | 3 | 2024 |
| Nitrate | MR | 2 | 2005 |
| Revised Total Coliform Rule | MON | 1 | 2019 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Arsenic | MR | 1 | 2005 |
Violation Count vs. the National Corpus
North Plains Water Department has 38 recorded EPA violations, 49% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 50% carry more. 0% of this system's own violations are health-based (0 of 38), and it ranks #9,357 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)
38 Lower than most fewer violations than 50% 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 North Plains Water Department
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 OR4100576.
Sources: EPA SDWIS
Nationwide peers
38 violations · 3,663 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 similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with North Plains Water Department
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.