Silverdale, WA: 6 Violations - Home Safety 97/100
2 ZIP codes · 6 water systems · Updated
ZipCheckup grade for Silverdale: A.
Checked records flag no major concern; missing data is unknown.
Across Silverdale, WA, the overall grade falls in the upper range - a summary score, not a measurement taken at any single tap.
How Silverdale Compares
Data: EPA SDWIS
Silverdale Water: The Quick Version
- Your city's water systems recorded 6 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0068 mg/L.
- Homes built before 1986: 47% - older plumbing may contain lead solder.
- Health risk index (ZipCheckup composite of CDC data): 11.76.
Water Systems Serving Silverdale
Counting every public water system linked to Silverdale, WA in federal data gives 6. The list below keeps the 3 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.
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Overview
We track home safety data for 2 ZIP codes in Silverdale, Washington (population ~27,978), covering 6 community water systems serving approximately 60,898 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 2 ZIP codes.
1 of 2 ZIP codes with a reported violation count in the available EPA record (50%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Silverdale: A (97/100)
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
Silverdale water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0068 mg/L (EPA action level: 0.015 mg/L)
- 0 of 2 ZIP codes with known status exceed the EPA lead action level
Radon Risk
2 of 2 ZIP records with known zones are in EPA Radon Zone 3.
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 |
|---|---|---|---|
| Consumer Confidence Rule | Reporting | 10 | 1 |
| Nitrate | Inorganic | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 98383 | A | 6 | 0 | Silverdale Water District 16 |
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 98315 | — | Naval Base Kitsap at Bangor | 16,828 |
All ZIP Codes in Silverdale
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 Silverdale
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 Silverdale
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Silverdale'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
Plumbing materials follow installation dates, not medians. Silverdale records a median build year of 1984, and a meaningful share of its homes date from before the 1986 federal lead restrictions.
Most homes in Silverdale 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.
Protecting Children from Lead in Silverdale
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 Silverdale
Historical NFIP data for Silverdale contains 8 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $73,682. Among ZIP codes with claim records, 0% 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.
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.
Deep Dive Reports
Detailed analysis for Silverdale, WA