Water Quality in Kennewick, WA (99336)
EPA violation data for public water systems serving ZIP code 99336.
42
Total Violations
18
Health-Based
24
Monitoring / Reporting
41
Resolved
What does this mean?
41 of 42 violations have been resolved. 18 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 24 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 (42 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2025 | Resolved | N/A |
| Nitrate | Health-Based | N/A | 10.5 | Jun 30, 2025 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 10.7 | Jun 30, 2025 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Nitrate | Health-Based | N/A | 10.4 | Mar 31, 2025 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Nitrate | Health-Based | N/A | 10.3 | Jun 30, 2024 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Public Notice | Monitoring | N/A | N/A | May 29, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 29, 2024 | Active | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2024 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(5)
Consumer Confidence Rule
71
Nitrate
01
Nitrate
01
Revised Total Coliform Rule
3A
Nitrate
01
2024(8)
Consumer Confidence Rule
71
Nitrate
01
Public Notice
75
Public Notice
75
Lead and Copper Rule
57
Lead and Copper Rule
57
Lead and Copper Rule
57
Lead and Copper Rule
57
How Does This Compare?
Kennewick (99336) has 42 recorded violations, including 18 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.