Throughout Silverdale and across its water systems, EPA compliance data for WA shows above-average performance - violations are minimal, none of the tracked systems have recorded repeated MCL exceedances in recent cycles, and the safety picture has held steady across multiple reporting periods.

Data: EPA SDWIS

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 lead level (90th percentile): 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

Dominant radon zone: Zone 3 (Low Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 2 ZIP codes

Top Contaminants

Areas with Most Violations

Areas with No Violations

All ZIP Codes in Silverdale

• 98315
• 98383 [A] - 6 violations

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.

Housing Age Profile

A median build year of 1984 in Silverdale is characteristic of a mixed-era city where plumbing risk depends heavily on the specific property. Homes built before 1986 may have lead-soldered copper joints; those from before 1970 face the added possibility of lead service lines. The percentages above capture how much of the residential stock falls into each risk era.

1984

Median Year Built

47%

Pre-1986 (Lead Paint Risk)

5%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (5%) 1970–1986 (42%) Post-1986 (53%)

Most homes in Silverdale were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

Silverdale: Remediation Cost in Perspective

Equity impact data for Silverdale lands in the favorable tier - remediation claims a small slice of what properties here are worth.

Median Home Value

$565,100

Est. Remediation

$1,800

Remediation as % of home value 0.3%

Remediation costs in Silverdale are relatively low compared to home values. The $1,200–$2,500 estimated range is a small fraction of median property value. Home values are 21% above the Washington average.

Protecting Children from Lead in Silverdale

47%

Homes Built Before 1986

0.0068

mg/L Avg Lead (Limit: 0.015)

Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Confirming what arrives at a specific faucet is something utility-side averages cannot do. With 47% of Silverdale stock built before the lead-solder ban and citywide monitoring at or beyond the regulatory mark, a tap-level kit fits the standard diligence picture.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Silverdale

8

Total FEMA Flood Claims

$73,682

Avg Reported Sum With Payment Data

0%

A/V Share of Claim-Record ZIPs

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. The <strong>$1,800</strong> 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.