ZIP code
99403
in Clarkston, WashingtonPopulation 20,760
48.68/ 100
Ranked #18,100 of 32,066 US ZIPs (bottom 44%)
Ranked #433 of 581 Washington ZIPs (bottom 25%)
Ranked #6 of 11 Lewiston, ID-WA ZIPs (bottom 45%)
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
2.1%
in the top 4.4% nationally
Lower is healthier
ST75thUS96thDefinition & 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 ›Distance to a Superfund site
65.6 mi
in the top 7.4% nationally
Higher is healthier
ST98thUS93rdDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest Superfund site — an abandoned or uncontrolled hazardous-waste site the EPA has listed for cleanup.
Full methodology ›Transit access
3.3 per 1,000 residents
in the top 9.2% nationally
Higher is healthier
ST80thUS91stDefinition & source ›
The number of public-transit stops 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 ›Child-care access
0.45 per 1,000 residents
in the top 13.5% nationally
Higher is healthier
ST91stUS87thDefinition & source ›
The number of child day-care services 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 ›Dry extreme heat
17.4 days/year
in the top 26% nationally
Lower is healthier
ST92ndUS74thDefinition & source ›
The average number of days per year with a modeled daily high of at least 95 °F.
Full methodology ›Lithium in drinking water
30 µg/L
in the top 32% nationally
Lower is healthier
ST97thUS68thDefinition & source ›
The average detected level of lithium — a natural trace metal with no federal drinking-water limit yet — across the public water systems serving this ZIP, in micrograms per liter.
Measured from EPA records for the public water systems that serve this ZIP. Households on private wells — roughly 30% of the US population — are not covered by this measure, and this figure says nothing about their water.
Full methodology ›The read
Clarkston, Washington (ZIP 99403), on the composite measure, lands in the bottom 44% nationally (18,100th) and the bottom 25% of Washington (433rd), based on limited data; treat as directional.
The readings split fairly evenly between strengths and concerns: distance to an emergency room registers at the national minimum, shared with about 11% of ZIPs. Distance to a Superfund site lands in the top 7.4% nationally, transit resides in the top 9.2% nationally, and mental-health providers lies in the top 11.0% nationally. Distance to a community health center settles at the national minimum, shared with about 23% of ZIPs. Childcare stands in the top 13.5% nationally. Distance to a nursing home is at the national minimum, shared with about 27% of ZIPs. Modeled short sleep rests in the bottom 14.0% nationally. Working the other way, modeled fine-particle sits in the top 4.4% nationally, and tree cover registers in the bottom 16% nationally.
In everyday language, fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. Distance to a Superfund site is an abandoned or uncontrolled hazardous-waste site the EPA has identified for cleanup. Distance to a community health center is a federally funded (HRSA) community health center serving everyone regardless of ability to pay. A healthier neighbor overall sits at ZIP 83501, 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 65%
16%
Risk Behavior
healthier than 80%
11%
Healthcare Access
in the top 0.00%
5%
About typical
Climate / Disaster RiskPartial
healthier than 55%
5%
Holding it back
Chronic Disease Burden
healthier than 40%
21%
Environmental Hazard
healthier than 17%
14%
Preventive Care
healthier than 32%
13%
Mental Health
healthier than 24%
8%
Disability
healthier than 35%
7%
Lifting this score
Healthcare Access
in the top 0.00%
5%
About typical
Preventive Care
healthier than 55%
13%
Holding it back
Chronic Disease Burden
healthier than 17%
21%
Social Need / SDOH
healthier than 23%
16%
Environmental Hazard
healthier than 20%
14%
Risk Behavior
healthier than 39%
11%
Mental Health
healthier than 34%
8%
Disability
healthier than 15%
7%
Climate / Disaster RiskPartial
healthier than 17%
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
83501
Idahoshares a border
Score 50.40
Closest healthier
99179
Washingtonshares a border
Score 55.87
Similar health profile
28613
North Carolina95% similar profile
Score 48.24
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 | 32.3% | 29.7–35.3 |
| High blood pressure among adults | 36.7% | 33.7–40.2 |
| Cancer (non-skin) or melanoma among adults | 10.5% | 9.7–11.5 |
| Current asthma among adults | 11.9% | 10.8–13.3 |
| Coronary heart disease among adults | 7.9% | 7.1–8.7 |
| Chronic obstructive pulmonary disease among adults | 8.2% | 7.4–9.2 |
| Depression among adults | 26.1% | 23.3–29.6 |
| Diagnosed diabetes among adults | 12.4% | 11.0–14.1 |
| High cholesterol among adults who have ever been screened | 37.1% | 34.0–40.8 |
| Obesity among adults | 35.4% | 30.9–40.9 |
| Stroke among adults | 4.2% | 3.9–4.6 |
| All teeth lost among adults aged >=65 years | 12.9% | 10.6–15.4 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 8.2% | 7.0–9.6 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 76.1% | 73.6–78.9 |
| Visits to doctor for routine checkup within the past year among adults | 75.5% | 72.7–78.7 |
| Cholesterol screening among adults | 83.7% | 82.1–85.3 |
| Colorectal cancer screening among adults aged 45–75 years | 68.0% | 63.6–72.1 |
| Visited dentist or dental clinic in the past year among adults | 61.6% | 58.2–64.7 |
| Mammography use among women aged 50-74 years | 71.4% | 64.3–77.8 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.0% | 13.8–18.9 |
| Current cigarette smoking among adults | 13.8% | 12.0–15.9 |
| No leisure-time physical activity among adults | 21.7% | 18.8–25.2 |
| Short sleep duration among adults | 30.9% | 26.3–35.6 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 19.6% | 17.5–22.1 |
| Frequent mental distress among adults | 17.9% | 16.1–19.9 |
| Frequent physical distress among adults | 15.4% | 13.9–17.3 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 16.1% | 14.5–17.9 |
| Any disability among adults | 36.1% | 32.7–39.9 |
| Hearing disability among adults | 9.4% | 8.5–10.4 |
| Independent living disability among adults | 9.4% | 8.5–10.4 |
| Mobility disability among adults | 16.4% | 14.6–18.5 |
| Self-care disability among adults | 4.4% | 4.0–4.9 |
| Vision disability among adults | 5.4% | 4.9–5.9 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | WA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 14.8% | 10.6% (3.1–25.8%) n=32,364 | 9.6% (3.5–22.3%) n=583 |
| Uninsured 18–64 | 9.7% | 9.0% (1.5–24.3%) n=32,286 | 8.2% (1.8–22.7%) n=582 |
| No HS diploma (25+) | 7.2% | 7.9% (1.8–20.7%) n=32,505 | 7.0% (1.5–16.5%) n=588 |
| Bachelor's or higher (25+) | 25.0% | 23.3% (9.2–53.6%) n=32,505 | 27.4% (12.3–59.7%) n=588 |
| Unemployment rate (16+) | 5.2% | 3.9% (0.0–9.8%) n=32,274 | 4.5% (0.0–9.7%) n=584 |
| Households without a vehicle | 3.0% | 3.9% (0.0–12.5%) n=32,322 | 3.7% (0.0–10.2%) n=580 |
| Broadband subscription | 87.1% | 89.3% (75.1–97.1%) n=32,322 | 92.7% (81.1–97.4%) n=580 |
| Housing cost burden (≥30% income) | 25.1% | 23.7% (10.6–40.0%) n=32,322 | 28.9% (14.6–40.6%) n=580 |
| Homeownership rate | 72.2% | 78.7% (51.7–94.0%) n=32,322 | 75.2% (48.2–91.7%) n=580 |
| Crowded housing (>1 per room) | 1.2% | 1.3% (0.0–6.3%) n=32,322 | 2.6% (0.0–7.9%) n=580 |
| Foreign-born population | 2.8% | 2.6% (0.0–18.6%) n=32,553 | 6.7% (0.3–27.6%) n=588 |
| Single-parent households | 59.2% | 53.6% (37.3–74.1%) n=32,087 | 54.3% (40.5–76.0%) n=574 |
| Population 65+ | 24.7% | 19.4% (10.8–33.6%) n=32,553 | 18.9% (10.3–36.9%) n=588 |
| Median age | 45.7 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.0 yr (32.9–58.8) n=584 |
| Median household income | $71,482 | $72,070 ($46,039–$118,707) n=30,318 | $84,646 ($56,217–$132,145) n=547 |
| Median home value | $325,300 | $222,200 ($100,300–$579,820) n=30,049 | $452,750 ($241,540–$826,380) n=542 |
| Median gross rent | $1,036 | $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 unavailable for this ZIP — fewer than 80% of the census tracts that make it up could be matched across the 2010→2020 tract-boundary revision, so no value is published rather than an unreliable one. See how coverage gaps are handled. | |||
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