ZIP code
62326
in Colchester, IllinoisPopulation 2,236
48.25/ 100
Ranked #18,609 of 32,066 US ZIPs (bottom 42%)
Ranked #921 of 1,368 Illinois ZIPs (bottom 33%)
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.
Fiber broadband
98.6%
in the top 5.6% nationally
Higher is healthier
ST98thUS94thDefinition & source ›
The share of homes where fiber-optic internet service is available.
Full methodology ›Arsenic in groundwater
19.1%
in the top 6.9% nationally
Lower is healthier
ST81stUS93rdDefinition & 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 ›PFAS in drinking water
9.3%
in the bottom 7.4% nationally
Lower is healthier
ST12thUS7thDefinition & 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 ›Radon
3 pCi/L
in the top 9.7% nationally
Lower is healthier
ST93rdUS90thDefinition & 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 ›Mammography
68.4%
in the bottom 8.6% nationally
Higher is healthier
ST8thUS9thDefinition & source ›
The estimated share of women aged 50–74 who had a mammogram within the past two years.
Full methodology ›Industrial-pollution burden
in the bottom 16% nationally
Lower is healthier
ST8thUS16thDefinition & 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 ›Slow internet speeds
0.63%
in the top 17% nationally
Lower is healthier
ST90thUS83rdDefinition & source ›
The share of homes whose fastest available download speed is under 10 Mbps.
Full methodology ›Dry extreme heat
17.9 days/year
in the top 25% nationally
Lower is healthier
ST93rdUS75thDefinition & source ›
The average number of days per year with a modeled daily high of at least 95 °F.
Full methodology ›Air-toxics cancer risk
20 per million
in the bottom 25% nationally
Lower is healthier
ST1stUS25thDefinition & source ›
The EPA’s modeled estimate of added lifetime cancer risk from breathing outdoor air toxics, in cases per million people exposed over a lifetime.
Full methodology ›High cholesterol
40.6%
in the top 27% nationally
Lower is healthier
ST90thUS73rdDefinition & source ›
The estimated share of adults with high cholesterol, among those who have ever been screened for it.
Full methodology ›Cross-source signals
Combined exposures in this ZIP
More than one environmental exposure stands out in this ZIP. Each is established independently and shown on its own above; they are grouped here for context — not because one causes the other.
This area ranks among the highest 10% of US ZIP codes for both modeled radon and modeled groundwater arsenic.
See the full radon & arsenic analysis →
The read
On the composite measure, Colchester, Illinois (ZIP 62326) stands in the bottom 42% nationally (18,609th) and the bottom 33% of Illinois (921st), based on limited data; treat as directional.
Several signals sit on each side of the ledger here: fiber broadband stands in the top 5.6% nationally, and modeled pfas sits in the bottom 7.4% nationally. Crowded housing resides at the national minimum, shared with about 29% of ZIPs. Modeled industrial-pollution burden stands in the bottom 16% nationally. Working the other way, modeled arsenic sits in the top 6.9% nationally, radon resides in the top 9.7% nationally, and mammography stands in the bottom 8.6% nationally. Distance to a community health center sits in the top 11.5% nationally. Distance to a hazardous-chemical facility resides at the national minimum, shared with about 31% of ZIPs. Modeled transportation noise stands in the top 17% nationally.
For clarity, arsenic is a natural groundwater contaminant, here a modeled estimate of the chance private-well levels exceed a benchmark. 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. Radon is a radioactive soil gas the EPA identifies as the top cause of lung cancer in nonsmokers. ZIP 61420, just across the boundary, ranks better overall among the ZIPs nearby.
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.
Nothing measured is lifting this score.
About typical
Preventive Care
healthier than 41%
13%
Risk Behavior
healthier than 52%
11%
Mental Health
healthier than 57%
8%
Disability
healthier than 50%
7%
Holding it back
Chronic Disease Burden
healthier than 37%
21%
Social Need / SDOH
healthier than 34%
16%
Environmental Hazard
healthier than 32%
14%
Climate / Disaster RiskPartial
healthier than 38%
5%
Healthcare Access
healthier than 13%
5%
Nothing measured is lifting this score.
About typical
Environmental Hazard
healthier than 42%
14%
Risk Behavior
healthier than 56%
11%
Mental Health
healthier than 48%
8%
Holding it back
Chronic Disease Burden
healthier than 25%
21%
Social Need / SDOH
healthier than 38%
16%
Preventive Care
healthier than 40%
13%
Disability
healthier than 34%
7%
Climate / Disaster RiskPartial
healthier than 20%
5%
Healthcare Access
healthier than 18%
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
61420
Illinoisshares a border
Score 49.03
Closest healthier
62321
Illinoisshares a border
Score 53.63
Similar health profile
62053
Illinois84% similar profile
Score 48.16
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 | 31.4% | 27.8–35.3 |
| High blood pressure among adults | 39.4% | 34.8–44.1 |
| Cancer (non-skin) or melanoma among adults | 10.6% | 9.6–11.7 |
| Current asthma among adults | 10.4% | 9.1–11.8 |
| Coronary heart disease among adults | 8.1% | 7.2–9.2 |
| Chronic obstructive pulmonary disease among adults | 9.1% | 7.8–10.6 |
| Depression among adults | 22.5% | 18.9–26.2 |
| Diagnosed diabetes among adults | 13.1% | 11.2–15.1 |
| High cholesterol among adults who have ever been screened | 40.6% | 35.7–45.4 |
| Obesity among adults | 37.2% | 28.7–46.1 |
| Stroke among adults | 4.1% | 3.6–4.6 |
| All teeth lost among adults aged >=65 years | 12.3% | 9.9–14.9 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 7.5% | 5.9–9.3 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 79.2% | 76.0–82.0 |
| Visits to doctor for routine checkup within the past year among adults | 79.3% | 75.6–82.5 |
| Cholesterol screening among adults | 88.0% | 86.1–89.6 |
| Colorectal cancer screening among adults aged 45–75 years | 62.8% | 57.4–67.9 |
| Visited dentist or dental clinic in the past year among adults | 61.2% | 57.4–64.9 |
| Mammography use among women aged 50-74 years | 68.4% | 59.4–76.5 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 17.2% | 14.0–20.5 |
| Current cigarette smoking among adults | 15.3% | 12.7–18.3 |
| No leisure-time physical activity among adults | 24.1% | 19.7–29.0 |
| Short sleep duration among adults | 34.7% | 28.1–42.0 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 20.3% | 17.2–23.6 |
| Frequent mental distress among adults | 16.4% | 14.4–18.5 |
| Frequent physical distress among adults | 14.7% | 12.7–16.8 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 13.6% | 11.6–15.6 |
| Any disability among adults | 32.3% | 27.6–37.0 |
| Hearing disability among adults | 8.7% | 7.6–9.8 |
| Independent living disability among adults | 8.6% | 7.5–9.9 |
| Mobility disability among adults | 15.9% | 13.4–18.5 |
| Self-care disability among adults | 4.0% | 3.5–4.7 |
| Vision disability among adults | 4.9% | 4.3–5.7 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 23.2% | 19.3–27.1 |
| Food insecurity in the past 12 months among adults | 12.8% | 10.1–15.5 |
| Received food stamps in the past 12 months among adults | 12.7% | 10.1–15.6 |
| Housing insecurity in the past 12 months among adults | 9.8% | 8.0–11.7 |
| Lack of reliable transportation in the past 12 months among adults | 6.8% | 5.7–8.0 |
| Loneliness among adults | 32.1% | 26.8–37.4 |
| Utility services shut-off threat in the past 12 months among adults | 6.4% | 5.4–7.6 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | IL median (p10–p90) |
|---|---|---|---|
| Poverty rate | 7.3% | 10.6% (3.1–25.8%) n=32,364 | 9.4% (3.4–21.4%) n=1,378 |
| Uninsured 18–64 | 11.9% | 9.0% (1.5–24.3%) n=32,286 | 6.6% (1.7–15.2%) n=1,375 |
| No HS diploma (25+) | 5.7% | 7.9% (1.8–20.7%) n=32,505 | 6.5% (2.1–16.1%) n=1,377 |
| Bachelor's or higher (25+) | 26.7% | 23.3% (9.2–53.6%) n=32,505 | 21.6% (9.3–49.2%) n=1,377 |
| Unemployment rate (16+) | 3.5% | 3.9% (0.0–9.8%) n=32,274 | 4.2% (0.7–10.0%) n=1,375 |
| Households without a vehicle | 9.3% | 3.9% (0.0–12.5%) n=32,322 | 3.9% (0.0–11.8%) n=1,377 |
| Broadband subscription | 82.0% | 89.3% (75.1–97.1%) n=32,322 | 89.4% (77.4–96.0%) n=1,377 |
| Housing cost burden (≥30% income) | 21.2% | 23.7% (10.6–40.0%) n=32,322 | 21.2% (10.7–34.7%) n=1,377 |
| Homeownership rate | 79.0% | 78.7% (51.7–94.0%) n=32,322 | 80.9% (61.0–94.1%) n=1,377 |
| Crowded housing (>1 per room) | 0.0% | 1.3% (0.0–6.3%) n=32,322 | 0.9% (0.0–4.1%) n=1,377 |
| Foreign-born population | 0.0% | 2.6% (0.0–18.6%) n=32,553 | 1.4% (0.0–17.6%) n=1,378 |
| Single-parent households | 53.7% | 53.6% (37.3–74.1%) n=32,087 | 53.8% (39.6–70.3%) n=1,372 |
| Population 65+ | 24.8% | 19.4% (10.8–33.6%) n=32,553 | 19.4% (12.1–28.7%) n=1,378 |
| Median age | 40.9 yr | 42.2 yr (33.0–56.3) n=32,292 | 42.1 yr (34.3–52.1) n=1,373 |
| Median household income | $65,000 | $72,070 ($46,039–$118,707) n=30,318 | $75,429 ($50,714–$114,949) n=1,334 |
| Median home value | $119,000 | $222,200 ($100,300–$579,820) n=30,049 | $154,250 ($86,310–$346,100) n=1,332 |
| Median gross rent | — | $1,021 ($677–$1,912) n=25,670 | $934 ($675–$1,653) n=1,170 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | IL median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 78.4 yr ± 1.28 | 78.9 yr (74.7–82.8) n=31,308 | 78.9 yr (75.5–82.2) n=1,348 |
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 1.28 years of 78.4, 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