ZIP code
99328
in Dayton, WashingtonPopulation 3,646
50.95/ 100
Ranked #14,928 of 32,066 US ZIPs (top 47%)
Ranked #377 of 581 Washington ZIPs (bottom 35%)
Ranks are modeled estimates — ZIPs a few hundred places apart are effectively tied.
What defines this ZIP
Metrics where this ZIP sits in the tails of the national distribution — the ones that most set it apart. Select any tile for its definition and methodology.
Fine-particle (PM2.5) exceedance
2.2%
in the top 4.0% nationally
Lower is healthier
ST82ndUS96thDefinition & source ›
The share of days in the year when modeled fine-particle (PM2.5) pollution was above the EPA’s daily limit of 35 micrograms per cubic meter.
Full methodology ›Industrial-pollution burden
in the bottom 4.3% nationally
Lower is healthier
ST4thUS4thDefinition & source ›
The EPA’s modeled screening score for industrial chemical releases, weighting the amounts released by their toxicity and how many people live nearby — a relative comparison score, not a measured exposure.
Full methodology ›Mammography
66.9%
in the bottom 5.3% nationally
Higher is healthier
ST11thUS5thDefinition & source ›
The estimated share of women aged 50–74 who had a mammogram within the past two years.
Full methodology ›Walkability
1.6 intersections/sq mi
in the bottom 5.1% nationally
Higher is healthier
ST9thUS5thDefinition & source ›
The number of street intersections per square mile — a standard street-connectivity measure; denser networks correlate with more walkable neighborhoods.
Full methodology ›Elder-services access
0.28 per 1,000 residents
in the top 5.1% nationally
Higher is healthier
ST96thUS95thDefinition & source ›
The number of services for older adults and people with disabilities inside this ZIP’s boundary, per 1,000 residents.
Counted from establishments located inside this ZIP’s boundary, so one just across the line is not counted. Where a ZIP has too few residents for the density to be reliable, no value is published rather than an unreliable one.
Full methodology ›Distance to a nursing home
14.8 mi
in the top 5.6% nationally
Lower is healthier
ST84thUS94thDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest Medicare- or Medicaid-certified nursing home.
Full methodology ›Short sleep
29%
in the bottom 5.8% nationally
Lower is healthier
ST21stUS6thDefinition & source ›
The estimated share of adults who usually sleep less than seven hours in a 24-hour period.
Full methodology ›PFAS in drinking water
9.3%
in the bottom 7.4% nationally
Lower is healthier
ST13thUS7thDefinition & source ›
The modeled probability that PFAS “forever chemicals” would be detected in untreated groundwater in this area, the source private wells draw on.
A modeled likelihood for untreated groundwater, the source drawn on by private wells, which are federally unregulated. It is not a measurement of treated water delivered by a public system, and it is not a test of any individual well.
Full methodology ›Nitrate in drinking water
0.10%
in the top 8.2% nationally
Lower is healthier
ST91stUS92ndDefinition & source ›
The modeled share of this area’s domestic-well groundwater at or above the federal nitrate limit of 10 milligrams per liter.
A modeled likelihood for untreated groundwater, the source drawn on by private wells, which are federally unregulated. It is not a measurement of treated water delivered by a public system, and it is not a test of any individual well.
Full methodology ›Humid extreme heat
11.8 days/year
in the bottom 8.7% nationally
Lower is healthier
ST57thUS9thDefinition & source ›
The average number of days per year when modeled heat stress — temperature, humidity, sun, and wind combined — reaches levels hard on the body outdoors.
Full methodology ›The read
Dayton, Washington (ZIP 99328), by its overall standing, sits in the top 47% healthiest ZIPs nationally (14,928th) and the bottom 35% of Washington (377th), based on limited data; treat as directional.
The data is generous to this ZIP in several places worth naming: modeled industrial-pollution burden settles in the bottom 4.3% nationally, and elder services registers in the top 5.1% nationally. Distance to an emergency room stands at the national minimum, shared with about 11% of ZIPs. Modeled short sleep lands in the bottom 5.8% nationally, and pfas is in the bottom 7.4% nationally. Working the other way, modeled fine-particle resides in the top 4.0% nationally, and mammography rests in the bottom 5.3% nationally. Walkability lies in the bottom 5.1% nationally, and distance to a nursing home sits in the top 5.6% nationally. Modeled nitrate settles in the top 8.2% nationally.
Defined in plain terms, fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. Industrial-pollution burden is the EPA's modeled screening score weighting industrial chemical releases by their toxicity and how many people live nearby. Pfas is the man-made "forever chemicals" that build up in the body and environment instead of breaking down; here a modeled estimate of the chance a private well contains them. The nearest ZIP ranking healthier overall is ZIP 97828, just across the boundary.
What’s driving this score
Nine domains make up the ZipVitals Score — here is how this ZIP does on each, and how much each one counts.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Social Need / SDOH
healthier than 61%
16%
Risk Behavior
healthier than 92%
11%
Climate / Disaster RiskPartial
healthier than 93%
5%
About typical
Mental Health
healthier than 42%
8%
Disability
healthier than 45%
7%
Holding it back
Chronic Disease Burden
healthier than 37%
21%
Environmental Hazard
healthier than 37%
14%
Preventive Care
healthier than 34%
13%
Healthcare Access
healthier than 7%
5%
Lifting this score
Risk Behavior
healthier than 69%
11%
Mental Health
healthier than 63%
8%
Climate / Disaster RiskPartial
healthier than 66%
5%
About typical
Preventive Care
healthier than 58%
13%
Holding it back
Chronic Disease Burden
healthier than 15%
21%
Social Need / SDOH
healthier than 21%
16%
Environmental Hazard
healthier than 39%
14%
Disability
healthier than 21%
7%
Healthcare Access
healthier than 7%
5%
“Share” is how much of this ZIP’s score the domain accounts for. Percentages are rounded; higher is healthier in every domain. How the score works, and who it compares you with ›
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
97828
Oregonshares a border
Score 54.14
Closest healthier
99143
Washingtonshares a border
Score 55.55
Similar health profile
98922
Washington95% similar profile
Score 51.39
How these were chosen: only ZIPs with a published Score appear — a nearby ZIP with too little data to score won’t. Nearby means closest by distance between ZIP boundaries, which can cross state lines. A similar health profile is a close match across the nine Score domains, not similar demographics. Distances are measured between ZIP boundaries — ZIPs that touch share a border. How distance is measured
Evidence
Every measure this page draws on, by source. Collapsed by default — the full data stays in the page for search engines either way.
Health OutcomesCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Arthritis among adults | 33.5% | 30.0–37.1 |
| High blood pressure among adults | 37.3% | 33.3–41.5 |
| Cancer (non-skin) or melanoma among adults | 11.7% | 10.6–12.8 |
| Current asthma among adults | 11.5% | 10.3–12.9 |
| Coronary heart disease among adults | 8.2% | 7.3–9.2 |
| Chronic obstructive pulmonary disease among adults | 7.9% | 6.8–9.2 |
| Depression among adults | 25.8% | 22.3–29.6 |
| Diagnosed diabetes among adults | 12.4% | 10.7–14.2 |
| High cholesterol among adults who have ever been screened | 39.7% | 35.6–44.2 |
| Obesity among adults | 32.4% | 26.2–39.6 |
| Stroke among adults | 4.3% | 3.8–4.8 |
| All teeth lost among adults aged >=65 years | 12.8% | 10.5–15.4 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 7.6% | 6.1–9.4 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 77.6% | 74.4–80.6 |
| Visits to doctor for routine checkup within the past year among adults | 74.3% | 70.6–78.0 |
| Cholesterol screening among adults | 86.5% | 84.7–88.3 |
| Colorectal cancer screening among adults aged 45–75 years | 69.3% | 64.8–73.9 |
| Visited dentist or dental clinic in the past year among adults | 65.1% | 61.8–68.4 |
| Mammography use among women aged 50-74 years | 66.9% | 59.3–74.5 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 14.6% | 12.1–17.5 |
| Current cigarette smoking among adults | 12.2% | 10.2–14.5 |
| No leisure-time physical activity among adults | 20.7% | 17.0–24.6 |
| Short sleep duration among adults | 29.0% | 24.3–34.5 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 19.5% | 16.8–22.5 |
| Frequent mental distress among adults | 15.8% | 14.1–17.9 |
| Frequent physical distress among adults | 15.5% | 13.7–17.6 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 14.1% | 12.3–16.1 |
| Any disability among adults | 33.1% | 29.0–37.5 |
| Hearing disability among adults | 9.5% | 8.4–10.6 |
| Independent living disability among adults | 8.4% | 7.3–9.6 |
| Mobility disability among adults | 16.1% | 14.0–18.6 |
| Self-care disability among adults | 4.2% | 3.7–4.8 |
| Vision disability among adults | 5.0% | 4.4–5.7 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | WA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 9.6% | 10.6% (3.1–25.8%) n=32,364 | 9.6% (3.5–22.3%) n=583 |
| Uninsured 18–64 | 15.3% | 9.0% (1.5–24.3%) n=32,286 | 8.2% (1.8–22.7%) n=582 |
| No HS diploma (25+) | 10.8% | 7.9% (1.8–20.7%) n=32,505 | 7.0% (1.5–16.5%) n=588 |
| Bachelor's or higher (25+) | 24.0% | 23.3% (9.2–53.6%) n=32,505 | 27.4% (12.3–59.7%) n=588 |
| Unemployment rate (16+) | 4.1% | 3.9% (0.0–9.8%) n=32,274 | 4.5% (0.0–9.7%) n=584 |
| Households without a vehicle | 6.4% | 3.9% (0.0–12.5%) n=32,322 | 3.7% (0.0–10.2%) n=580 |
| Broadband subscription | 81.1% | 89.3% (75.1–97.1%) n=32,322 | 92.7% (81.1–97.4%) n=580 |
| Housing cost burden (≥30% income) | 21.4% | 23.7% (10.6–40.0%) n=32,322 | 28.9% (14.6–40.6%) n=580 |
| Homeownership rate | 77.4% | 78.7% (51.7–94.0%) n=32,322 | 75.2% (48.2–91.7%) n=580 |
| Crowded housing (>1 per room) | 1.9% | 1.3% (0.0–6.3%) n=32,322 | 2.6% (0.0–7.9%) n=580 |
| Foreign-born population | 5.5% | 2.6% (0.0–18.6%) n=32,553 | 6.7% (0.3–27.6%) n=588 |
| Single-parent households | 60.5% | 53.6% (37.3–74.1%) n=32,087 | 54.3% (40.5–76.0%) n=574 |
| Population 65+ | 29.6% | 19.4% (10.8–33.6%) n=32,553 | 18.9% (10.3–36.9%) n=588 |
| Median age | 49.3 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.0 yr (32.9–58.8) n=584 |
| Median household income | $72,756 | $72,070 ($46,039–$118,707) n=30,318 | $84,646 ($56,217–$132,145) n=547 |
| Median home value | $272,100 | $222,200 ($100,300–$579,820) n=30,049 | $452,750 ($241,540–$826,380) n=542 |
| Median gross rent | $982 | $1,021 ($677–$1,912) n=25,670 | $1,416 ($840–$2,197) n=476 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | WA median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 79.0 yr ± 1.27 | 78.9 yr (74.7–82.8) n=31,308 | 80.2 yr (77.3–83.1) n=584 |
About the ± — it’s this estimate’s give-or-take (statisticians call it the standard error). The true life expectancy for this ZIP most likely falls within 1.27 years of 79.0, and it’s very unlikely to be off by more than twice that.
More ZIPs to explore ▾More ZIPs to explore ▴
How these lists were built: they draw only from ZIPs that have a published Score, so ZIPs with too little data to score are not listed. Distance-based lists use distance between ZIP boundaries with no state filter, so an out-of-state ZIP can appear. Statistically similar means a close match across the nine Score domains, not a demographic match: the measure is the cosine similarity between two ZIPs’ domain scores, taken over the domains both ZIPs have data for and only where that overlap covers at least six of the nine — and where no ZIP clears that minimum-overlap floor, that list is left out rather than filled with a weak match. How distance is measured