ZIP code
99346
in Plymouth, WashingtonPopulation 198
44.67/ 100
Ranked #22,740 of 32,066 US ZIPs (bottom 29%)
Ranked #519 of 581 Washington ZIPs (bottom 10.7%)
Ranked #15 of 15 Kennewick-Richland, WA ZIPs (bottom 6.7%)
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.
Home broadband subscription
100%
at the national maximum
Higher is healthier
ST99thUS99thDefinition & source ›
The share of households with a broadband internet subscription.
Full methodology ›Walkability
1.4 intersections/sq mi
in the bottom 4.2% nationally
Higher is healthier
ST8thUS4thDefinition & source ›
The number of street intersections per square mile — a standard street-connectivity measure; denser networks correlate with more walkable neighborhoods.
Full methodology ›Tree cover
0.00%
at the national minimum
Higher is healthier
ST1stUS1stDefinition & source ›
The share of this ZIP’s land area covered by forest.
Full methodology ›Uninsured (under 65)
17.5%
in the top 7.0% nationally
Lower is healthier
ST95thUS93rdDefinition & source ›
The estimated share of adults aged 18–64 with no current health-insurance coverage.
Full methodology ›Nitrate in drinking water
0.08%
in the top 8.3% nationally
Lower is healthier
ST90thUS92ndDefinition & 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 ›Fine-particle (PM2.5) exceedance
1.1%
in the top 8.6% nationally
Lower is healthier
ST64thUS91stDefinition & 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 ›Arsenic in groundwater
16.5%
in the top 8.7% nationally
Lower is healthier
ST86thUS91stDefinition & source ›
The modeled probability that untreated groundwater in this area — the source private wells draw on — exceeds the federal arsenic limit of 10 micrograms 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 ›Mammography
68.5%
in the bottom 8.8% nationally
Higher is healthier
ST18thUS9thDefinition & source ›
The estimated share of women aged 50–74 who had a mammogram within the past two years.
Full methodology ›Homeownership rate
94.7%
in the top 9.1% nationally
Higher is healthier
ST94thUS91stDefinition & source ›
The share of occupied homes that are owned, rather than rented, by the people living in them.
Full methodology ›Energy-cost burden
1.7%
in the bottom 7.2% nationally
Lower is healthier
ST30thUS7thDefinition & source ›
The modeled share of household income spent on home energy bills — electricity, gas, and heating fuels.
A modeled share of household income spent on home energy. Estimates that hit the model’s 100% ceiling are suppressed rather than published, because at that point the figure reflects the model’s limit rather than a measured burden.
Full methodology ›The read
In its overall standing, Plymouth, Washington (ZIP 99346) lands in the bottom 29% nationally (22,740th) and the bottom 10.7% of Washington (519th), based on limited data; treat as directional.
Reading the numbers as a whole, the picture lands somewhere in between: home broadband subscription lies at the national maximum. Unemployment stands at the national minimum, shared with about 15% of ZIPs. Homeownership rests in the top 9.1% nationally. On the other side, walkability registers in the bottom 4.2% nationally, and modeled tree cover resides at the national minimum. Modeled uninsured settles in the top 7.0% nationally, and nitrate is in the top 8.3% nationally. Modeled fine-particle sits in the top 8.6% nationally, and arsenic lands in the top 8.7% nationally. Modeled mammography lies in the bottom 8.8% nationally.
Against the wider neighborhood, park land runs far lower than the surrounding ZIPs on this measure. Put simply, nitrate is a groundwater compound from fertilizer, manure, and sewage, here a modeled estimate of the chance private-well levels exceed a benchmark. Fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. Arsenic is a natural groundwater contaminant, here a modeled estimate of the chance private-well levels exceed a benchmark. On the overall standing, ZIP 97838, just across the boundary, ranks healthier.
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 75%
16%
Risk Behavior
healthier than 69%
11%
About typical
Mental Health
healthier than 45%
8%
Healthcare Access
healthier than 50%
5%
Holding it back
Chronic Disease Burden
healthier than 29%
21%
Environmental Hazard
healthier than 22%
14%
Preventive Care
healthier than 11%
13%
Disability
healthier than 15%
7%
Climate / Disaster RiskPartial
healthier than 40%
5%
Lifting this score
Mental Health
healthier than 68%
8%
Holding it back
Chronic Disease Burden
healthier than 10%
21%
Social Need / SDOH
healthier than 38%
16%
Environmental Hazard
healthier than 24%
14%
Preventive Care
healthier than 17%
13%
Risk Behavior
healthier than 19%
11%
Disability
healthier than 3%
7%
Climate / Disaster RiskPartial
healthier than 8%
5%
Healthcare Access
healthier than 39%
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
97838
Oregonshares a border
Score 49.50
Closest healthier
97882
Oregonshares a border
Score 49.46
Similar health profile
83661
Idaho94% similar profile
Score 45.40
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 | 30.6% | 27.9–33.4 |
| High blood pressure among adults | 36.5% | 33.4–39.7 |
| Cancer (non-skin) or melanoma among adults | 9.3% | 8.3–10.4 |
| Current asthma among adults | 11.4% | 10.2–12.7 |
| Coronary heart disease among adults | 8.9% | 7.7–10.2 |
| Chronic obstructive pulmonary disease among adults | 9.3% | 7.5–11.1 |
| Depression among adults | 23.8% | 21.1–26.7 |
| Diagnosed diabetes among adults | 15.6% | 13.7–17.8 |
| High cholesterol among adults who have ever been screened | 42.2% | 39.0–45.5 |
| Obesity among adults | 41.0% | 36.6–45.8 |
| Stroke among adults | 4.6% | 4.0–5.3 |
| All teeth lost among adults aged >=65 years | 8.8% | 7.2–10.6 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 17.5% | 13.9–21.2 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 73.8% | 70.5–76.8 |
| Visits to doctor for routine checkup within the past year among adults | 72.1% | 69.0–75.3 |
| Cholesterol screening among adults | 83.4% | 80.9–85.7 |
| Colorectal cancer screening among adults aged 45–75 years | 65.2% | 61.3–69.0 |
| Visited dentist or dental clinic in the past year among adults | 60.3% | 57.3–63.3 |
| Mammography use among women aged 50-74 years | 68.5% | 62.1–74.6 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 14.1% | 12.2–16.4 |
| Current cigarette smoking among adults | 15.0% | 12.2–18.0 |
| No leisure-time physical activity among adults | 29.5% | 25.2–34.3 |
| Short sleep duration among adults | 31.9% | 28.2–35.7 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 28.7% | 24.5–33.3 |
| Frequent mental distress among adults | 16.8% | 14.9–18.9 |
| Frequent physical distress among adults | 18.9% | 16.4–21.6 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 17.6% | 15.1–20.4 |
| Any disability among adults | 38.2% | 33.7–43.0 |
| Hearing disability among adults | 10.0% | 8.7–11.4 |
| Independent living disability among adults | 10.6% | 9.0–12.4 |
| Mobility disability among adults | 20.0% | 16.9–23.3 |
| Self-care disability among adults | 6.1% | 5.1–7.1 |
| Vision disability among adults | 7.7% | 6.6–9.0 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | WA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 8.6% | 10.6% (3.1–25.8%) n=32,364 | 9.6% (3.5–22.3%) n=583 |
| Uninsured 18–64 | 27.4% | 9.0% (1.5–24.3%) n=32,286 | 8.2% (1.8–22.7%) n=582 |
| No HS diploma (25+) | 13.9% | 7.9% (1.8–20.7%) n=32,505 | 7.0% (1.5–16.5%) n=588 |
| Bachelor's or higher (25+) | 16.7% | 23.3% (9.2–53.6%) n=32,505 | 27.4% (12.3–59.7%) n=588 |
| Unemployment rate (16+) | 0.0% | 3.9% (0.0–9.8%) n=32,274 | 4.5% (0.0–9.7%) n=584 |
| Households without a vehicle | 6.7% | 3.9% (0.0–12.5%) n=32,322 | 3.7% (0.0–10.2%) n=580 |
| Broadband subscription | 100.0% | 89.3% (75.1–97.1%) n=32,322 | 92.7% (81.1–97.4%) n=580 |
| Housing cost burden (≥30% income) | 16.0% | 23.7% (10.6–40.0%) n=32,322 | 28.9% (14.6–40.6%) n=580 |
| Homeownership rate | 94.7% | 78.7% (51.7–94.0%) n=32,322 | 75.2% (48.2–91.7%) n=580 |
| Crowded housing (>1 per room) | 0.0% | 1.3% (0.0–6.3%) n=32,322 | 2.6% (0.0–7.9%) n=580 |
| Foreign-born population | 20.2% | 2.6% (0.0–18.6%) n=32,553 | 6.7% (0.3–27.6%) n=588 |
| Single-parent households | 62.5% | 53.6% (37.3–74.1%) n=32,087 | 54.3% (40.5–76.0%) n=574 |
| Population 65+ | 32.8% | 19.4% (10.8–33.6%) n=32,553 | 18.9% (10.3–36.9%) n=588 |
| Median age | 55.8 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.0 yr (32.9–58.8) n=584 |
| Median household income | $50,865 | $72,070 ($46,039–$118,707) n=30,318 | $84,646 ($56,217–$132,145) n=547 |
| Median home value | $209,200 | $222,200 ($100,300–$579,820) n=30,049 | $452,750 ($241,540–$826,380) n=542 |
| Median gross rent | — | $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 | 82.2 yr ± 3.03 | 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 3.03 years of 82.2, 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