Water Quality in MARSHALL, OK (73056)
EPA violation data for public water systems serving ZIP code 73056.
17
Total Violations
10
Health-Based
7
Monitoring / Reporting
17
Resolved
What does this mean?
17 of 17 violations have been resolved. 10 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 7 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 |
|---|---|---|---|---|---|---|
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 2024 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 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 | Oct 1, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Oct 1, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Jun 30, 2021 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(1)
Consumer Confidence Rule
71
2024(6)
LEAD AND COPPER RULE REVISIONS
4G
LEAD AND COPPER RULE REVISIONS
4G
LEAD AND COPPER RULE REVISIONS
2E
LEAD AND COPPER RULE REVISIONS
2E
Consumer Confidence Rule
71
Consumer Confidence Rule
71
How Does This Compare?
MARSHALL (73056) has 17 recorded violations, including 10 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
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
Always look for filters certified by NSF International for the specific contaminants you want to remove.