Transient Non-Community Water System · PWS OR4193925
Washington Co Pks - Hagg Lake
Operator location Gaston, Oregon - smaller served population (≤ 999) at 800 people served; 174 SDWIS violations on record from groundwater sources.
- 800
- People served (this PWS)
- 174
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Washington Co Pks - Hagg Lake standing, high SDWIS violation third
800 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%). Population rank #22,639 of 29,740 among systems serving 500+.
The verdict
Washington Co Pks - Hagg Lake sits in the upper third of the sitemap cohort by violation count (174), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (800; 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.
- #22,639 of 29,740
- Population · /systems
- #286 of 373
- Population · OR
- 174
- Total EPA violations on record
- 2%
- 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
- Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 160
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 100 | 2016 |
| Surface Water Treatment Rule | MR | 49 | 1997 |
| Nitrate | MR | 5 | 2005 |
| Revised Total Coliform Rule | MON | 4 | 2016 |
| Surface Water Treatment Rule | TT | 4 | 1994 |
| COLIPHAGE | MR | 2 | 2016 |
Violation Count vs. the National Corpus
Washington Co Pks - Hagg Lake has 174 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 2% of this system's own violations are health-based (4 of 174), and it ranks #22,639 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)
174 Higher than most more violations than 83% 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 Washington Co Pks - Hagg Lake
EPA SDWIS lists 800 people served and 1 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
174 violations · 800 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 smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Washington Co Pks - Hagg Lake
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.