Water Quality in KOYUKUK, AK (99754)
EPA violation data for public water systems serving ZIP code 99754.
70
Total Violations
0
Health-Based
70
Monitoring / Reporting
69
Resolved
What does this mean?
69 of 70 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 70 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 (70 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 |
| Chlorine | Monitoring | N/A | N/A | Aug 31, 2025 | Resolved | Eye and nose irritation; stomach discomfort |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Chlorine | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | Eye and nose irritation; stomach discomfort |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| Chlorine | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | Eye and nose irritation; stomach discomfort |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2025 | Resolved | N/A |
| Chlorine | Monitoring | N/A | N/A | May 31, 2025 | Resolved | Eye and nose irritation; stomach discomfort |
| Chlorine | Monitoring | N/A | N/A | Apr 30, 2025 | Resolved | Eye and nose irritation; stomach discomfort |
Lead & Copper Levels
Violation Timeline
2025(15)
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Consumer Confidence Rule
71
Revised Total Coliform Rule
3A
Chlorine
27
Chlorine
27
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Chlorine
27
Chlorine
27
Revised Total Coliform Rule
3A
2024(22)
Revised Total Coliform Rule
3A
Chlorine
27
Lead and Copper Rule
52
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Revised Total Coliform Rule
3A
Chlorine
27
Chlorine
27
Revised Total Coliform Rule
3A
Consumer Confidence Rule
71
Chlorine
27
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
How Does This Compare?
KOYUKUK (99754) has 70 recorded violations, none of which are health-based. 1 remains 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.