Kitsap County, Washington
21 ZIP codes · Avg score 83/100 · Grade B · Updated 2026-06-03
In current tracking cycles, Kitsap County — spanning 21 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Kitsap County Compares
How Kitsap County Compares
Kitsap County scores 5 points above the Washington state average (78/100) and 15 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Kitsap County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.9 (asthma 11.1%, diabetes 10%)
Estimated additional annual cost per homeowner: $1,461, driven primarily by sea_level
Infrastructure: 0.39% avg pipe failure probability, 53% of ZIPs at high risk
57.7% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,461
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
111,448 housing units in Kitsap County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Kitsap County
Remediation costs are relatively manageable for most homeowners in Kitsap County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Kitsap County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Kitsap County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Bremerton | 70,913 | 7 |
| 2 | North Perry Ave Water District | 24,402 | 7 |
| 3 | Rocky Point Water District 12 | 1,831 | 5 |
| 4 | Rhododendron Heights Water Company | 78 | 5 |
| 5 | Lone Rock Water Assn | 39 | 5 |
27 total water systems serve Kitsap County.
All ZIP Codes in Kitsap County
21 ZIP codes tracked in Kitsap County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98314 | Bremerton | 99 | A | 1 | — |
| 2 | 98315 | Silverdale | 99 | A | 0 | — |
| 3 | 98337 | Bremerton | 99 | A | 1 | $387K |
| 4 | 98353 | Manchester | 99 | A | 0 | — |
| 5 | 98311 | Bremerton | 95 | A | 1 | $448K |
| 6 | 98383 | Silverdale | 95 | A | 0 | $565K |
| 7 | 98310 | Bremerton | 90 | A | 1 | $422K |
| 8 | 98312 | Bremerton | 90 | A | 1 | $431K |
| 9 | 98366 | Port Orchard | 89 | A | 2 | $450K |
| 10 | 98367 | Port Orchard | 89 | A | 2 | $508K |
| 11 | 98370 | Poulsbo | 88 | A | 2 | $587K |
| 12 | 98110 | Bainbridge Island | 85 | A | 0 | $1076K |
| 13 | 98380 | Seabeck | 82 | B | 0 | $567K |
| 14 | 98342 | Indianola | 73 | B | 0 | $644K |
| 15 | 98392 | Suquamish | 73 | B | 0 | $433K |
| 16 | 98061 | Rollingbay | 66 | C | 0 | — |
| 17 | 98345 | Keyport | 66 | C | 0 | $621K |
| 18 | 98393 | Tracyton | 66 | C | 0 | — |
| 19 | 98438 | Mcchord Afb | 66 | C | 0 | — |
| 20 | 98320 | Brinnon | 65 | C | 0 | $266K |
| 21 | 98346 | Kingston | 65 | C | 0 | $561K |
Recommended Buyer Guides for Kitsap County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 57.7% of homes built before 1978
Deep Dive Reports
Detailed analysis for Kitsap County, Washington
Overview
Kitsap County in Washington covers 21 ZIP codes with an average Home Safety Score of B (83/100).
8 of 21 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Washington water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.