ZIP code
57028
in Flandreau, South DakotaPopulation 3,450
52.34/ 100
Ranked #12,988 of 32,066 US ZIPs (top 41%)
Ranked #220 of 360 South Dakota ZIPs (bottom 39%)
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.
Radon
3.9 pCi/L
in the top 2.5% nationally
Lower is healthier
ST77thUS98thDefinition & source ›
The modeled typical indoor radon level for this area, in picocuries per liter — the EPA recommends fixing a home at 4 pCi/L or above.
Modeled from indoor-radon measurements. In Alaska and Hawaii, where those measurements are not published, a US Geological Survey geologic radon-potential category stands in — a coarser input, disclosed rather than hidden.
Full methodology ›Elder-services access
0.3 per 1,000 residents
in the top 4.6% nationally
Higher is healthier
ST85thUS95thDefinition & 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 ›Natural-disaster risk
in the top 5.3% nationally
Lower is healthier
ST96thUS95thDefinition & source ›
This area’s national rank on its single highest non-flood natural hazard — such as wildfire, tornado, or earthquake — in FEMA’s modeled National Risk Index; flooding is shown separately.
Full methodology ›Outer-floodplain exposure
6.2%
in the top 6.1% nationally
Lower is healthier
ST85thUS94thDefinition & source ›
The share of this ZIP’s land area inside FEMA’s 0.2%-annual-chance flood band — the “500-year” zone, a lower but real 1-in-500 yearly chance.
Measured from FEMA’s mapped flood panels. Where a panel has not been mapped, no value is published for that ZIP — those ZIPs are absent from this comparison rather than counted as unexposed.
Full methodology ›Fine-particle (PM2.5) exceedance
1.4%
in the top 6.6% nationally
Lower is healthier
ST95thUS93rdDefinition & 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 ›Crowded housing
7.9%
in the top 6.9% nationally
Lower is healthier
ST88thUS93rdDefinition & source ›
The share of occupied homes with more than one person per room, the Census definition of crowded housing.
Full methodology ›Distance to a Superfund site
67.8 mi
in the top 7.0% nationally
Higher is healthier
ST31stUS93rdDefinition & 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 ›Walkability
2.2 intersections/sq mi
in the bottom 8.9% nationally
Higher is healthier
ST62ndUS9thDefinition & source ›
The number of street intersections per square mile — a standard street-connectivity measure; denser networks correlate with more walkable neighborhoods.
Full methodology ›Fiber broadband
96.1%
in the top 9.3% nationally
Higher is healthier
ST43rdUS91stDefinition & source ›
The share of homes where fiber-optic internet service is available.
Full methodology ›Expected annual disaster loss
$0
in the top 15% nationally
Lower is healthier
ST90thUS85thDefinition & source ›
FEMA’s modeled estimate, in dollars per year, of the average harm to people expected from natural hazards — an annualized average, not a forecast for any single year.
Full methodology ›The read
In overall standing, Flandreau, South Dakota (ZIP 57028) comes out in the top 41% healthiest ZIPs nationally (12,988th) and the bottom 39% of South Dakota (220th).
The measures fall on both sides of the ledger for this area: elder services lands in the top 4.6% nationally. Distance to an emergency room is at the national minimum, shared with about 11% of ZIPs. Distance to a Superfund site resides in the top 7.0% nationally, and fiber broadband rests in the top 9.3% nationally. Set against that, modeled radon lies in the top 2.5% nationally, and disaster risk sits in the top 5.3% nationally. Outer-floodplain exposure settles in the top 6.1% nationally, and modeled fine-particle registers in the top 6.6% nationally. Crowded housing stands in the top 6.9% nationally, and walkability lands in the bottom 8.9% nationally.
In plain terms, radon is a radioactive soil gas the EPA identifies as the top cause of lung cancer in nonsmokers. Disaster risk is the area's national rank on its highest non-flood peril in FEMA's modeled Risk Index, like wildfire or quake. Fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. The nearest healthier ZIP overall is ZIP 57002, 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
Preventive Care
healthier than 62%
13%
Risk Behavior
healthier than 61%
11%
Mental Health
healthier than 86%
8%
About typical
Chronic Disease Burden
healthier than 46%
21%
Disability
healthier than 44%
7%
Climate / Disaster Risk
healthier than 54%
5%
Holding it back
Social Need / SDOH
healthier than 27%
16%
Environmental Hazard
healthier than 30%
14%
Healthcare Access
healthier than 33%
5%
Lifting this score
Mental Health
healthier than 74%
8%
Healthcare Access
healthier than 80%
5%
About typical
Preventive Care
healthier than 44%
13%
Holding it back
Chronic Disease Burden
healthier than 34%
21%
Social Need / SDOH
healthier than 31%
16%
Environmental Hazard
healthier than 26%
14%
Risk Behavior
healthier than 39%
11%
Disability
healthier than 24%
7%
Climate / Disaster Risk
healthier than 38%
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
56144
Minnesotashares a border
Score 51.04
Closest healthier
57002
South Dakotashares a border
Score 56.89
Similar health profile
15928
Pennsylvania98% similar profile
Score 53.73
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 | 29.3% | 26.0–32.6 |
| High blood pressure among adults | 36.3% | 32.4–40.5 |
| Cancer (non-skin) or melanoma among adults | 10.3% | 9.4–11.3 |
| Current asthma among adults | 10.6% | 9.4–11.8 |
| Coronary heart disease among adults | 8.0% | 7.2–9.0 |
| Chronic obstructive pulmonary disease among adults | 7.6% | 6.5–8.7 |
| Depression among adults | 19.3% | 16.4–22.4 |
| Diagnosed diabetes among adults | 13.8% | 12.1–15.8 |
| High cholesterol among adults who have ever been screened | 36.2% | 32.0–40.4 |
| Obesity among adults | 35.0% | 27.6–43.0 |
| Stroke among adults | 4.2% | 3.8–4.7 |
| All teeth lost among adults aged >=65 years | 15.6% | 12.5–18.9 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 9.3% | 7.8–10.9 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 79.1% | 76.2–81.8 |
| Visits to doctor for routine checkup within the past year among adults | 78.2% | 74.8–81.4 |
| Cholesterol screening among adults | 86.9% | 85.3–88.6 |
| Colorectal cancer screening among adults aged 45–75 years | 65.6% | 60.1–70.6 |
| Visited dentist or dental clinic in the past year among adults | 66.4% | 62.7–69.9 |
| Mammography use among women aged 50-74 years | 77.9% | 69.8–84.3 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.1% | 13.4–19.0 |
| Current cigarette smoking among adults | 16.2% | 13.8–18.7 |
| No leisure-time physical activity among adults | 26.5% | 22.3–31.2 |
| Short sleep duration among adults | 31.6% | 24.9–38.4 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 19.4% | 16.8–22.2 |
| Frequent mental distress among adults | 14.6% | 13.0–16.5 |
| Frequent physical distress among adults | 13.9% | 12.2–15.6 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 13.5% | 11.9–15.4 |
| Any disability among adults | 32.4% | 28.3–36.8 |
| Hearing disability among adults | 9.8% | 8.7–11.0 |
| Independent living disability among adults | 8.4% | 7.3–9.6 |
| Mobility disability among adults | 15.4% | 13.3–17.8 |
| Self-care disability among adults | 4.1% | 3.6–4.6 |
| Vision disability among adults | 5.6% | 4.9–6.2 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | SD median (p10–p90) |
|---|---|---|---|
| Poverty rate | 15.7% | 10.6% (3.1–25.8%) n=32,364 | 8.8% (1.1–33.5%) n=364 |
| Uninsured 18–64 | 18.7% | 9.0% (1.5–24.3%) n=32,286 | 9.6% (0.0–33.2%) n=365 |
| No HS diploma (25+) | 6.4% | 7.9% (1.8–20.7%) n=32,505 | 6.0% (0.8–15.3%) n=366 |
| Bachelor's or higher (25+) | 32.0% | 23.3% (9.2–53.6%) n=32,505 | 24.6% (10.3–40.7%) n=366 |
| Unemployment rate (16+) | 3.9% | 3.9% (0.0–9.8%) n=32,274 | 1.1% (0.0–8.0%) n=365 |
| Households without a vehicle | 4.3% | 3.9% (0.0–12.5%) n=32,322 | 1.9% (0.0–9.6%) n=364 |
| Broadband subscription | 87.9% | 89.3% (75.1–97.1%) n=32,322 | 87.9% (73.7–96.3%) n=364 |
| Housing cost burden (≥30% income) | 30.9% | 23.7% (10.6–40.0%) n=32,322 | 17.5% (5.2–30.6%) n=364 |
| Homeownership rate | 65.1% | 78.7% (51.7–94.0%) n=32,322 | 79.9% (57.2–94.8%) n=364 |
| Crowded housing (>1 per room) | 7.9% | 1.3% (0.0–6.3%) n=32,322 | 0.6% (0.0–10.2%) n=364 |
| Foreign-born population | 5.2% | 2.6% (0.0–18.6%) n=32,553 | 0.6% (0.0–5.3%) n=367 |
| Single-parent households | 52.1% | 53.6% (37.3–74.1%) n=32,087 | 56.7% (32.7–81.4%) n=362 |
| Population 65+ | 22.2% | 19.4% (10.8–33.6%) n=32,553 | 20.3% (8.4–33.0%) n=367 |
| Median age | 40.0 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.5 yr (27.6–56.7) n=365 |
| Median household income | $72,798 | $72,070 ($46,039–$118,707) n=30,318 | $74,865 ($51,211–$102,582) n=336 |
| Median home value | $193,800 | $222,200 ($100,300–$579,820) n=30,049 | $177,400 ($79,000–$321,400) n=311 |
| Median gross rent | $681 | $1,021 ($677–$1,912) n=25,670 | $763 ($544–$1,089) n=243 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | SD median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 76.4 yr ± 1.25 | 78.9 yr (74.7–82.8) n=31,308 | 80.7 yr (77.4–84.2) n=357 |
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 1.25 years of 76.4, 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