Community Water System · PWS OR4100789
Sandy, City Of
Operator location Sandy, Oregon - 26% of 347 violations are health-based (upper-third health share (> 23%)); surface water source; 12,991 served per SDWIS.
- 12,991
- People served (this PWS)
- 347
- EPA violations (this PWS)
- 89
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Sandy, City Of standing, high SDWIS violation third
26% of 347 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #3,876 of 29,740 among systems serving 500+.
The verdict
Sandy, City Of sits in the upper third of the sitemap cohort by violation count (347), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (12,991; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #3,876 of 29,740
- Population · /systems
- #52 of 373
- Population · OR
- 347
- Total EPA violations on record
- 26%
- 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
- 4,100
- County
- Clackamas
- School/Daycare
- No
- MCL Violations
- 55
- Monitoring Violations
- 245
- Treatment Tech Violations
- 34
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 53 | 2018 |
| Coliform (TCR) | MR | 42 | 2008 |
| Surface Water Treatment Rule | TT | 33 | 2022 |
| Surface Water Treatment Rule | MR | 31 | 2023 |
| TTHM | MR | 29 | 2020 |
| Total Haloacetic Acids (HAA5) | MR | 27 | 2020 |
| Public Notice | Other | 8 | 2018 |
| Nitrate | MR | 7 | 2008 |
| Interim Enhanced Surface Water Treatment Rule | MR | 7 | 2023 |
| BHC-GAMMA | MR | 3 | 2005 |
| Glyphosate | MR | 3 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2005 |
| Hexachlorocyclopentadiene | MR | 3 | 2005 |
| Atrazine | MR | 3 | 2005 |
| Heptachlor epoxide | MR | 3 | 2005 |
| HEXACHLOROBENZENE | MR | 3 | 2005 |
| Benzo(a)pyrene | MR | 3 | 2005 |
| Pentachlorophenol | MR | 3 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2005 |
| Chlordane | MR | 3 | 2005 |
| Endrin | MR | 3 | 2005 |
| Methoxychlor | MR | 3 | 2005 |
| Toxaphene | MR | 3 | 2005 |
| Dalapon | MR | 3 | 2005 |
| OXAMYL | MR | 3 | 2005 |
| Picloram | MR | 3 | 2005 |
| Dinoseb | MR | 3 | 2005 |
| Heptachlor | MR | 3 | 2005 |
| Endothall | MR | 3 | 2005 |
Violation Count vs. the National Corpus
Sandy, City Of has 347 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 26% of this system's own violations are health-based (89 of 347), and it ranks #3,876 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)
347 Higher than most more violations than 92% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 290 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFDoA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFUnA | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 8:2 FTS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/24/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NMeFOSAA | 6/24/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 6/24/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 6/24/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHxS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFOS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 6/24/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 6/24/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 6/24/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFDA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/24/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/24/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 6/24/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 6/24/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Sandy, City Of
89 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OR4100789.
Sources: EPA SDWIS
Nationwide peers
347 violations · 12,991 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 Sandy, 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.