Water Quality in HOLLIS, OK (73550)
EPA violation data for public water systems serving ZIP code 73550.
159
Total Violations
88
Health-Based
71
Monitoring / Reporting
156
Resolved
What does this mean?
156 of 159 violations have been resolved. 88 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 71 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 (159 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Nitrate-Nitrite | Health-Based | N/A | 11 | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Dec 31, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Dec 31, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Dec 31, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Health-Based | N/A | 11 | Dec 31, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Active | N/A |
Lead & Copper Levels
Violation Timeline
2025(4)
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
2024(47)
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Glyphosate
03
Glyphosate
03
Glyphosate
03
Glyphosate
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4-D
03
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
2,4-D
03
Glyphosate
03
Glyphosate
03
Glyphosate
03
Glyphosate
03
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
Nitrate-Nitrite
01
2,4-D
03
2,4-D
03
2,4-D
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Glyphosate
03
Glyphosate
03
Glyphosate
03
Glyphosate
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4-D
03
How Does This Compare?
HOLLIS (73550) has 159 recorded violations, including 88 health-based. 3 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
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.