Water Quality in PORTLAND, OR (97266)
EPA violation data for public water systems serving ZIP code 97266.
37
Total Violations
0
Health-Based
37
Monitoring / Reporting
37
Resolved
What does this mean?
37 of 37 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 37 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (37 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 31, 2025 | Resolved | N/A |
| COLIPHAGE | Monitoring | N/A | N/A | Aug 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| COLIPHAGE | Monitoring | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| COLIPHAGE | Monitoring | N/A | N/A | Nov 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| COLIPHAGE | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | Oct 13, 2024 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| COLIPHAGE | Monitoring | N/A | N/A | Aug 31, 2024 | Resolved | N/A |
| COLIPHAGE | Monitoring | N/A | N/A | Jul 31, 2024 | Resolved | N/A |
Violation Timeline
2025(4)
Revised Total Coliform Rule
3A
COLIPHAGE
19
Revised Total Coliform Rule
3A
COLIPHAGE
19
2024(8)
COLIPHAGE
19
Revised Total Coliform Rule
3A
COLIPHAGE
19
E. COLI
34
COLIPHAGE
19
COLIPHAGE
19
COLIPHAGE
19
Revised Total Coliform Rule
3A
How Does This Compare?
PORTLAND (97266) has 37 recorded violations, none of which are health-based. All violations have been resolved, which is a positive sign for current water quality. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
One of the few filtration methods effective at removing nitrates and nitrites. Essential for households with infants.
Targets:Nitrate, Nitrite, Dissolved Solids
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.