ZIP code
03823
in Madbury, New HampshirePopulation 2,203
63.14/ 100
Ranked #2,898 of 32,066 US ZIPs (top 9.1%)
Ranked #45 of 243 New Hampshire ZIPs (top 19%)
Ranked #145 of 281 Boston-Cambridge-Newton, MA-NH ZIPs (bottom 48%)
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.
Median household income
$148,365
in the top 4.1% nationally
Higher is healthier
ST91stUS96thDefinition & source ›
The middle household income in this ZIP — half of households earn more, half earn less — in dollars per year.
Full methodology ›Fatal road crashes
0 per 100,000 residents per year
at the national minimum
Lower is healthier
ST1stUS1stDefinition & source ›
The annual rate of fatal road crashes per 100,000 residents, pooled over a ten-year window.
A rate per resident population. Where a ZIP has too few residents for the rate to be reliable — about 30% of US ZIPs — no value is published rather than an unstable one; those ZIPs are absent from this comparison, not counted as crash-free.
Full methodology ›Distance to a Superfund site
0.2 mi
in the bottom 4.3% nationally
Higher is healthier
ST9thUS4thDefinition & 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 ›Food insecurity
7.2%
in the bottom 4.3% nationally
Lower is healthier
ST14thUS4thDefinition & source ›
The estimated share of adults who experienced food insecurity in the past 12 months.
Full methodology ›Lack of transportation
4.6%
in the bottom 4.4% nationally
Lower is healthier
ST17thUS4thDefinition & source ›
The estimated share of adults who lacked reliable transportation in the past 12 months.
Full methodology ›Arsenic in groundwater
22.3%
in the top 5.4% nationally
Lower is healthier
ST90thUS95thDefinition & 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 ›Housing insecurity
6.7%
in the bottom 5.4% nationally
Lower is healthier
ST24thUS5thDefinition & source ›
The estimated share of adults who experienced housing insecurity in the past 12 months.
Full methodology ›Fair or poor health
12.0%
in the bottom 3.4% nationally
Lower is healthier
ST9thUS3rdDefinition & source ›
The estimated share of adults who rate their own general health as fair or poor.
Full methodology ›Short sleep
29%
in the bottom 5.8% nationally
Lower is healthier
ST4thUS6thDefinition & source ›
The estimated share of adults who usually sleep less than seven hours in a 24-hour period.
Full methodology ›Utility shut-off threat
4.5%
in the bottom 7.6% nationally
Lower is healthier
ST19thUS8thDefinition & source ›
The estimated share of adults whose household was threatened with a utility shut-off in the past 12 months.
Full methodology ›The read
In its overall standing, Madbury, New Hampshire (ZIP 03823) lands in the top 9.1% healthiest ZIPs nationally (2,898th) and the top 19% of New Hampshire (45th).
Reading the numbers as a whole, the picture lands somewhere in between: household income lands in the top 4.1% nationally, fatal road crashes lies at the national minimum, and modeled food insecurity stands in the bottom 4.3% nationally. Modeled transportation rests in the bottom 4.4% nationally, housing insecurity registers in the bottom 5.4% nationally, and fair or poor health resides in the bottom 3.4% nationally. Modeled short sleep settles in the bottom 5.8% nationally, and utility shutoff is in the bottom 7.6% nationally. On the other side, distance to a Superfund site sits in the bottom 4.3% nationally, and modeled arsenic lands in the top 5.4% nationally.
Against the wider neighborhood, park land runs far higher than the surrounding ZIPs on this measure. Put simply, distance to a Superfund site is an abandoned or uncontrolled hazardous-waste site the EPA has identified for cleanup. Arsenic is a natural groundwater contaminant, here a modeled estimate of the chance private-well levels exceed a benchmark. On the overall standing, ZIP 03861, less than a tenth of a mile away, 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. Compare it against the US, this state and the Boston-Cambridge-Newton, MA-NH metro area.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Chronic Disease Burden
healthier than 84%
21%
Social Need / SDOH
healthier than 76%
16%
Preventive Care
healthier than 81%
13%
Risk Behavior
healthier than 95%
11%
Disability
healthier than 93%
7%
Climate / Disaster Risk
healthier than 68%
5%
About typical
Mental Health
healthier than 57%
8%
Healthcare Access
healthier than 51%
5%
Holding it back
Environmental Hazard
healthier than 31%
14%
Lifting this score
Chronic Disease Burden
healthier than 91%
21%
Social Need / SDOH
healthier than 70%
16%
Risk Behavior
healthier than 88%
11%
Disability
healthier than 93%
7%
About typical
Preventive Care
healthier than 44%
13%
Healthcare Access
healthier than 59%
5%
Holding it back
Environmental Hazard
healthier than 16%
14%
Mental Health
healthier than 34%
8%
Climate / Disaster Risk
healthier than 33%
5%
Lifting this score
Risk Behavior
healthier than 80%
11%
Disability
healthier than 63%
7%
Climate / Disaster Risk
healthier than 70%
5%
About typical
Chronic Disease Burden
healthier than 56%
21%
Environmental Hazard
healthier than 51%
14%
Mental Health
healthier than 47%
8%
Holding it back
Social Need / SDOH
healthier than 40%
16%
Preventive Care
healthier than 27%
13%
Healthcare Access
healthier than 25%
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 ›
Findings that name this ZIP
One of our published findings lists this ZIP code. Each finding compares one published measure against a stated benchmark, and names only the ZIP codes whose estimates are reliable enough to rank. See all surprising findings.
Heavy environment, light chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 30.9; chronic-disease standing 84.3 — 53 points apart, heavier on the environment than it is on chronic illness.
Ranked #14,744 of the 18,187 ZIP codes this finding names, ordered by the gap from cleanest environment to heaviest chronic burden, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
03820
New Hampshireshares a border
Score 61.80
Closest healthier
03861
New Hampshireless than 0.1 mi away
Score 64.05
Similar health profile
48130
Michigan98% similar profile
Score 68.25
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 | 26.8% | 23.9–29.7 |
| High blood pressure among adults | 31.4% | 28.2–34.7 |
| Cancer (non-skin) or melanoma among adults | 9.4% | 8.6–10.4 |
| Current asthma among adults | 10.2% | 9.1–11.6 |
| Coronary heart disease among adults | 5.0% | 4.3–5.8 |
| Chronic obstructive pulmonary disease among adults | 5.1% | 4.1–6.3 |
| Depression among adults | 24.4% | 21.4–27.7 |
| Diagnosed diabetes among adults | 8.3% | 7.0–9.7 |
| High cholesterol among adults who have ever been screened | 36.1% | 32.9–39.6 |
| Obesity among adults | 31.5% | 26.6–36.4 |
| Stroke among adults | 2.6% | 2.2–3.0 |
| All teeth lost among adults aged >=65 years | 5.5% | 4.5–6.8 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 4.8% | 3.5–6.5 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 74.1% | 70.8–77.2 |
| Visits to doctor for routine checkup within the past year among adults | 78.6% | 75.5–81.6 |
| Cholesterol screening among adults | 89.3% | 87.3–91.1 |
| Colorectal cancer screening among adults aged 45–75 years | 69.2% | 65.4–73.1 |
| Visited dentist or dental clinic in the past year among adults | 73.1% | 70.3–75.9 |
| Mammography use among women aged 50-74 years | 77.3% | 71.7–82.7 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.4% | 13.9–19.3 |
| Current cigarette smoking among adults | 9.0% | 6.7–11.6 |
| No leisure-time physical activity among adults | 16.5% | 13.2–20.1 |
| Short sleep duration among adults | 29.0% | 25.1–33.3 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 12.0% | 9.8–14.5 |
| Frequent mental distress among adults | 15.1% | 12.8–17.2 |
| Frequent physical distress among adults | 10.2% | 8.6–11.9 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 10.1% | 8.3–12.0 |
| Any disability among adults | 22.4% | 18.8–26.0 |
| Hearing disability among adults | 6.4% | 5.5–7.3 |
| Independent living disability among adults | 5.4% | 4.4–6.4 |
| Mobility disability among adults | 9.1% | 7.3–10.9 |
| Self-care disability among adults | 2.4% | 2.0–2.9 |
| Vision disability among adults | 3.1% | 2.6–3.6 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 20.7% | 17.6–24.1 |
| Food insecurity in the past 12 months among adults | 7.2% | 5.4–9.5 |
| Received food stamps in the past 12 months among adults | 4.8% | 3.3–6.6 |
| Housing insecurity in the past 12 months among adults | 6.7% | 5.2–8.5 |
| Lack of reliable transportation in the past 12 months among adults | 4.6% | 3.7–5.6 |
| Loneliness among adults | 31.4% | 27.5–35.2 |
| Utility services shut-off threat in the past 12 months among adults | 4.5% | 3.7–5.7 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | NH median (p10–p90) |
|---|---|---|---|
| Poverty rate | 4.9% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (2.0–13.3%) n=243 |
| Uninsured 18–64 | 6.8% | 9.0% (1.5–24.3%) n=32,286 | 7.1% (2.2–14.5%) n=242 |
| No HS diploma (25+) | 2.4% | 7.9% (1.8–20.7%) n=32,505 | 4.5% (1.3–9.8%) n=243 |
| Bachelor's or higher (25+) | 52.6% | 23.3% (9.2–53.6%) n=32,505 | 38.8% (21.4–60.3%) n=243 |
| Unemployment rate (16+) | 2.1% | 3.9% (0.0–9.8%) n=32,274 | 2.8% (0.0–6.0%) n=243 |
| Households without a vehicle | 1.5% | 3.9% (0.0–12.5%) n=32,322 | 2.5% (0.0–8.4%) n=243 |
| Broadband subscription | 97.4% | 89.3% (75.1–97.1%) n=32,322 | 92.9% (85.7–99.0%) n=243 |
| Housing cost burden (≥30% income) | 20.7% | 23.7% (10.6–40.0%) n=32,322 | 27.1% (17.2–36.4%) n=243 |
| Homeownership rate | 82.9% | 78.7% (51.7–94.0%) n=32,322 | 86.0% (62.6–96.9%) n=243 |
| Crowded housing (>1 per room) | 0.3% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–3.1%) n=243 |
| Foreign-born population | 6.4% | 2.6% (0.0–18.6%) n=32,553 | 3.1% (0.5–7.1%) n=243 |
| Single-parent households | 37.1% | 53.6% (37.3–74.1%) n=32,087 | 60.9% (46.9–76.5%) n=243 |
| Population 65+ | 14.3% | 19.4% (10.8–33.6%) n=32,553 | 22.1% (15.1–37.1%) n=243 |
| Median age | 37.7 yr | 42.2 yr (33.0–56.3) n=32,292 | 47.1 yr (38.4–58.4) n=243 |
| Median household income | $148,365 | $72,070 ($46,039–$118,707) n=30,318 | $98,684 ($67,733–$147,723) n=235 |
| Median home value | $476,900 | $222,200 ($100,300–$579,820) n=30,049 | $371,500 ($252,560–$570,440) n=237 |
| Median gross rent | $1,574 | $1,021 ($677–$1,912) n=25,670 | $1,360 ($1,037–$1,893) n=197 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | NH median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 81.2 yr ± 1.00 | 78.9 yr (74.7–82.8) n=31,308 | 81.2 yr (78.0–85.7) n=242 |
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 1.00 years of 81.2, 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