King County, Washington
122 ZIP codes · Avg score 96/100 · Grade A
ZipCheckup grade for King County: A.
Checked records flag no major concern; missing data is unknown.
In King County, where this site follows 122 ZIP codes, the composite grade sits in the upper band.
How King County Compares
How King County Compares
King County scores 10 points above the Washington state average (86/100) and 23 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: King County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 8.8 (asthma 9.7%, diabetes 7.3%)
Modeled additional annual cost estimate per homeowner: $1,901, largest modeled factor: Sea Level
47% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,901
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
964,697 housing units in King 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 King County
Modeled remediation costs in King County can be compared with the median property value; actual costs vary by property.
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 King County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to King County ZIP codes
8 community water systems mapped to King County ZIP codes; EPA may list more systems serving the county.
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Show all 8 water systems
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70 water systems mapped to King County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in King County
5 water systems with violations in EPA records.
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All ZIP Codes in King County
122 ZIP codes tracked in King County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98002 | Auburn | 100 | A | 2 | $398K |
| 2 | 98005 | Bellevue | 100 | A | 0 | $1373K |
| 3 | 98007 | Bellevue | 100 | A | 0 | $935K |
| 4 | 98008 | Bellevue | 100 | A | 0 | $1130K |
| 5 | 98011 | Bothell | 100 | A | 1 | $888K |
| 6 | 98022 | Enumclaw | 100 | A | 2 | $577K |
| 7 | 98028 | Kenmore | 100 | A | 1 | $870K |
| 8 | 98034 | Kirkland | 100 | A | 1 | $875K |
| 9 | 98039 | Medina | 100 | A | 0 | $2000K |
| 10 | 98040 | Mercer Island | 100 | A | 0 | $1884K |
| 11 | 98055 | Renton | 100 | A | 0 | $562K |
| 12 | 98056 | Renton | 100 | A | 0 | $726K |
| 13 | 98057 | Renton | 100 | A | 1 | $607K |
| 14 | 98072 | Woodinville | 100 | A | 3 | $1067K |
| 15 | 98077 | Woodinville | 100 | A | 2 | $1132K |
| 16 | 98102 | Seattle | 100 | A | 0 | $989K |
| 17 | 98103 | Seattle | 100 | A | 0 | $1013K |
| 18 | 98104 | Seattle | 100 | A | 0 | $663K |
| 19 | 98105 | Seattle | 100 | A | 0 | $1261K |
| 20 | 98106 | Seattle | 100 | A | 0 | $667K |
| 21 | 98107 | Seattle | 100 | A | 0 | $925K |
| 22 | 98108 | Seattle | 100 | A | 0 | $694K |
| 23 | 98109 | Seattle | 100 | A | 0 | $986K |
| 24 | 98112 | Seattle | 100 | A | 0 | $1407K |
| 25 | 98115 | Seattle | 100 | A | 0 | $1042K |
| 26 | 98116 | Seattle | 100 | A | 0 | $917K |
| 27 | 98117 | Seattle | 100 | A | 0 | $1028K |
| 28 | 98118 | Seattle | 100 | A | 0 | $746K |
| 29 | 98119 | Seattle | 100 | A | 0 | $1033K |
| 30 | 98121 | Seattle | 100 | A | 0 | $797K |
| 31 | 98122 | Seattle | 100 | A | 0 | $929K |
| 32 | 98125 | Seattle | 100 | A | 0 | $845K |
| 33 | 98126 | Seattle | 100 | A | 0 | $752K |
| 34 | 98133 | Seattle | 100 | A | 0 | $719K |
| 35 | 98134 | Seattle | 100 | A | 0 | $385K |
| 36 | 98136 | Seattle | 100 | A | 0 | $900K |
| 37 | 98144 | Seattle | 100 | A | 0 | $890K |
| 38 | 98146 | Seattle | 100 | A | 0 | $642K |
| 39 | 98155 | Seattle | 100 | A | 0 | $758K |
| 40 | 98158 | Seattle | 100 | A | 0 | — |
| 41 | 98166 | Seattle | 100 | A | 0 | $786K |
| 42 | 98168 | Seattle | 100 | A | 1 | $501K |
| 43 | 98177 | Seattle | 100 | A | 0 | $996K |
| 44 | 98178 | Seattle | 100 | A | 0 | $628K |
| 45 | 98199 | Seattle | 100 | A | 0 | $1160K |
| 46 | 98004 | Bellevue | 99 | A | 3 | $2000K |
| 47 | 98014 | Carnation | 99 | A | 3 | $850K |
| 48 | 98030 | Kent | 99 | A | 6 | $540K |
| 49 | 98032 | Kent | 99 | A | 2 | $473K |
| 50 | 98045 | North Bend | 99 | A | 4 | $846K |
| 51 | 98047 | Pacific | 99 | A | 2 | $431K |
| 52 | 98058 | Renton | 99 | A | 3 | $627K |
| 53 | 98059 | Renton | 99 | A | 3 | $810K |
| 54 | 98148 | Seattle | 99 | A | 1 (1 health) | $576K |
| 55 | 98188 | Seattle | 99 | A | 3 (1 health) | $453K |
| 56 | 98198 | Seattle | 99 | A | 3 (1 health) | $527K |
| 57 | 98006 | Bellevue | 98 | A | 5 | $1234K |
| 58 | 98027 | Issaquah | 98 | A | 6 | $976K |
| 59 | 98031 | Kent | 98 | A | 6 | $552K |
| 60 | 98065 | Snoqualmie | 98 | A | 6 | $890K |
| 61 | 98070 | Vashon | 93 | A | 8 (1 health) | $718K |
| 62 | 98019 | Duvall | 85 | A | 45 | $747K |
| 63 | 98003 | Federal Way | 83 | B | 1 | $429K |
| 64 | 98010 | Black Diamond | 83 | B | 0 | $793K |
| 65 | 98023 | Federal Way | 83 | B | 1 | $546K |
| 66 | 98029 | Issaquah | 83 | B | 1 | $964K |
| 67 | 98033 | Kirkland | 83 | B | 0 | $1260K |
| 68 | 98051 | Ravensdale | 83 | B | 0 | $703K |
| 69 | 98052 | Redmond | 83 | B | 0 | $1108K |
| 70 | 98053 | Redmond | 83 | B | 2 | $1156K |
| 71 | 98074 | Sammamish | 83 | B | 1 | $1212K |
| 72 | 98075 | Sammamish | 83 | B | 0 | $1458K |
| 73 | 98001 | Auburn | 82 | B | 6 | $539K |
| 74 | 98038 | Maple Valley | 82 | B | 4 | $714K |
| 75 | 98042 | Kent | 82 | B | 5 | $613K |
| 76 | 98092 | Auburn | 79 | B | 14 (1 health) | $595K |
| 77 | 98009 | Bellevue | — | — | — | |
| 78 | 98013 | Burton | — | — | — | |
| 79 | 98015 | Bellevue | — | — | — | |
| 80 | 98024 | Fall City | — | — | 3 | $1005K |
| 81 | 98025 | Hobart | — | — | 0 | — |
| 82 | 98035 | Kent | — | — | — | |
| 83 | 98041 | Bothell | — | — | — | |
| 84 | 98050 | Preston | — | — | 0 | — |
| 85 | 98062 | Seahurst | — | — | — | |
| 86 | 98063 | Federal Way | — | — | — | |
| 87 | 98064 | Kent | — | — | — | |
| 88 | 98071 | Auburn | — | — | — | |
| 89 | 98073 | Redmond | — | — | — | |
| 90 | 98083 | Kirkland | — | — | — | |
| 91 | 98089 | Kent | — | — | — | |
| 92 | 98093 | Federal Way | — | — | — | |
| 93 | 98111 | Seattle | — | — | — | |
| 94 | 98113 | Seattle | — | — | — | |
| 95 | 98114 | Seattle | — | — | — | |
| 96 | 98124 | Seattle | — | — | — | |
| 97 | 98127 | Seattle | — | — | — | |
| 98 | 98129 | Seattle | — | — | — | |
| 99 | 98131 | Seattle | — | — | — | |
| 100 | 98132 | Seattle | — | — | — | |
| 101 | 98138 | Seattle | — | — | — | |
| 102 | 98139 | Seattle | — | — | — | |
| 103 | 98141 | Seattle | — | — | — | |
| 104 | 98145 | Seattle | — | — | — | |
| 105 | 98154 | Seattle | — | — | — | |
| 106 | 98160 | Seattle | — | — | — | |
| 107 | 98161 | Seattle | — | — | — | |
| 108 | 98164 | Seattle | — | — | $715K | |
| 109 | 98165 | Seattle | — | — | — | |
| 110 | 98170 | Seattle | — | — | — | |
| 111 | 98171 | Seattle | — | — | — | |
| 112 | 98174 | Seattle | — | — | 0 | — |
| 113 | 98175 | Seattle | — | — | — | |
| 114 | 98181 | Seattle | — | — | — | |
| 115 | 98185 | Seattle | — | — | — | |
| 116 | 98189 | Seattle | — | — | — | |
| 117 | 98190 | Seattle | — | — | — | |
| 118 | 98191 | Seattle | — | — | — | |
| 119 | 98194 | Seattle | — | — | — | |
| 120 | 98195 | Seattle | — | — | 0 | — |
| 121 | 98224 | Baring | — | — | $605K | |
| 122 | 98288 | Skykomish | — | — | $442K |
Recommended Buyer Guides for King County
Nothing on this list means a problem exists in your own home: the matches are drawn from county- and ZIP-level records, so a guide shows up because of an area signal, and only testing at your tap describes a specific household.
- Water Filters Certified for PFAS Reduction — PFAS detected in 1 ZIP code
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for King County, Washington
Overview
King County in Washington covers 122 tracked ZIP records with an average Home Safety Score of A (96/100) across 76 scored records.
36 of 81 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 3 health-based violations appear in the available health breakdown.
← Back to Washington Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.