Kennewick, WA: 8 Health Violations - Home Safety 64/100
3 ZIP codes · 7 water systems · Updated
ZipCheckup grade for Kennewick: C.
A mixed picture - some signals here are worth your attention.
Your top priority: match a filter's certification to the violations (8 health-based violations). NSF certified filters →
Neither high nor low, the composite grade for Kennewick, WA is a C, built from ZIP-level scores.
How Kennewick Compares
Data: EPA SDWIS
Kennewick Water: The Quick Version
- Your city's water systems recorded 45 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0011 mg/L.
- Homes built before 1986: 47% - older plumbing may contain lead solder.
- Estimated remediation: $900 per household.
- Health risk index (ZipCheckup composite of CDC data): 11.82.
Water Systems Serving Kennewick
The 3 largest of 7 systems connected with Kennewick, WA are listed below.
- C
- C
- C
Overview
We track home safety data for 3 ZIP codes in Kennewick, Washington (population ~103,495), covering 7 community water systems serving approximately 229,338 people region-wide. The EPA snapshots used for this build directly map water systems to 3 of 3 ZIP codes.
3 of 3 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 8 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Kennewick: C (64/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Kennewick water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0011 mg/L (EPA action level: 0.015 mg/L)
- 0 of 3 ZIP codes with known status exceed the EPA lead action level
Radon Risk
3 of 3 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Nitrate | Inorganic | 8 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 8 | 3 |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 7 | 3 |
| Endrin | Organic | 4 | 1 |
| BHC-gamma (Lindane) | Organic | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 99338 | C | 39 | 7 | City of Kennewick |
| 99337 | C | 8 | 1 | City of Kennewick |
| 99336 | C | 2 | 0 | City of Kennewick |
All ZIP Codes in Kennewick
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Kennewick
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Kennewick
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Kennewick's Housing Stock?
With 47% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Kennewick's housing spans eras before and after 1986; its median build year is 1989.
Most homes in Kennewick were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Kennewick: Remediation Cost in Perspective
Of the three cost-context tiers - low, moderate and elevated - Kennewick is in the low one.
Estimated remediation costs in Kennewick can be compared with local home values. The $550–$1,500 estimated range can be set against the median property value; actual costs vary by home. Home values are 24% below the Washington average.
Protecting Children from Lead in Kennewick
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Kennewick
Historical NFIP data for Kennewick contains 9 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $7,227. Among ZIP codes with claim records, 33% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $900 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Kennewick
- Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
- Install a certified water filter. For Nitrate, listed in the water-quality records for Kennewick: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. With 47% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Kennewick, WA