Community Water System · PWS OR4100630
Alder Creek Barlow Water Dist
Operator location Sandy, Oregon - smaller served population (≤ 999) at 300 people served; 83 SDWIS violations on record from surface water sources.
- 300
- People served (this PWS)
- 83
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Alder Creek Barlow Water Dist standing, high SDWIS violation third
300 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
Alder Creek Barlow Water Dist sits in the upper third of the sitemap cohort by violation count (83), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (300; 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.
- 83
- Total EPA violations on record
- 10%
- Health-based (MCL / treatment failure)
- 300
- 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
- 125
- County
- Clackamas
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 70
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MR | 23 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 23 | 2025 |
| Lead and Copper Rule | MR | 6 | 2005 |
| Surface Water Treatment Rule | MR | 6 | 2021 |
| Surface Water Treatment Rule | TT | 4 | 2021 |
| Revised Total Coliform Rule | MON | 3 | 2020 |
| Total Haloacetic Acids (HAA5) | MCL | 3 | 2023 |
| Consumer Confidence Rule | Other | 2 | 2025 |
| Public Notice | Other | 2 | 2023 |
| Coliform (TCR) | MR | 1 | 2000 |
| Lead and Copper Rule | TT | 1 | 2002 |
| Nitrate | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
Violation Count vs. the National Corpus
Alder Creek Barlow Water Dist has 83 recorded EPA violations, 69% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 31% carry more. 10% of this system's own violations are health-based (8 of 83), 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)
83 Around the middle fewer violations than 31% 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 Alder Creek Barlow Water Dist
EPA SDWIS lists 300 people served and 125 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
83 violations · 300 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 Alder Creek Barlow Water Dist
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.