Water Quality in CORVALLIS, OR (97333)
EPA violation data for public water systems serving ZIP code 97333.
92
Total Violations
12
Health-Based
80
Monitoring / Reporting
86
Resolved
What does this mean?
86 of 92 violations have been resolved. 12 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 80 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 (92 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 |
| Groundwater Rule | Monitoring | N/A | N/A | Aug 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Active | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2025 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(18)
Revised Total Coliform Rule
3A
Groundwater Rule
31
Revised Total Coliform Rule
3A
Groundwater Rule
31
Consumer Confidence Rule
71
Lead and Copper Rule
56
Consumer Confidence Rule
71
Lead and Copper Rule
52
Groundwater Rule
31
Groundwater Rule
31
Revised Total Coliform Rule
3A
Public Notice
75
Revised Total Coliform Rule
3A
Groundwater Rule
31
Groundwater Rule
31
Revised Total Coliform Rule
2A
Groundwater Rule
31
Groundwater Rule
31
2024(19)
Lead and Copper Rule
52
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Lead and Copper Rule
56
Lead and Copper Rule
52
Lead and Copper Rule
56
Consumer Confidence Rule
71
Consumer Confidence Rule
71
Lead and Copper Rule
56
Groundwater Rule
31
Revised Total Coliform Rule
3B
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
How Does This Compare?
CORVALLIS (97333) has 92 recorded violations, including 12 health-based. 6 remain unresolved. 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
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
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.