Water Quality in Vashon, WA (98070)
EPA violation data for public water systems serving ZIP code 98070.
17
Total Violations
2
Health-Based
15
Monitoring / Reporting
17
Resolved
What does this mean?
17 of 17 violations have been resolved. 2 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 15 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 (17 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 |
| Long Term 2 Enhanced Surface Water Treatment Rule | Health-Based | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Long Term 2 Enhanced Surface Water Treatment Rule | Health-Based | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(4)
Revised Total Coliform Rule
3A
Long Term 2 Enhanced Surface Water Treatment Rule
41
Long Term 2 Enhanced Surface Water Treatment Rule
41
Revised Total Coliform Rule
3A
2024(4)
Consumer Confidence Rule
71
Consumer Confidence Rule
71
Consumer Confidence Rule
71
Consumer Confidence Rule
71
How Does This Compare?
Vashon (98070) has 17 recorded violations, including 2 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.