ZIP code
96020
in Chester, CaliforniaPopulation 2,222
54.15/ 100
Ranked #10,503 of 32,066 US ZIPs (top 33%)
Ranked #825 of 1,719 California ZIPs (top 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.
Fine-particle (PM2.5) exceedance
9.8%
in the top 0.05% nationally
Lower is healthier
ST99thUS99thDefinition & 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 ›Park land
53.1%
in the top 2.2% nationally
Higher is healthier
ST93rdUS98thDefinition & source ›
The share of this ZIP’s land area that is public parkland.
Full methodology ›Grocery access
0.42 per 1,000 residents
in the top 2.2% nationally
Higher is healthier
ST99thUS98thDefinition & source ›
The number of full supermarkets 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. ZipVitals’s food-access signal is derived from these in-ZIP densities — it is not USDA’s food-desert designation, which measures distance to the nearest supermarket. Where a leg is missing, a ZIP reads “not determinable,” never “not a food desert.”
Full methodology ›Distance to a hazardous-chemical facility
27.5 mi
in the top 2.5% nationally
Higher is healthier
ST98thUS98thDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest facility that handles enough hazardous chemicals to require an EPA risk-management plan for accidental releases.
Full methodology ›Dental provider access
1.2 per 1,000 residents
in the top 4.0% nationally
Higher is healthier
ST90thUS96thDefinition & source ›
The number of dental offices located 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 ›Industrial-pollution burden
in the bottom 4.2% nationally
Lower is healthier
ST11thUS4thDefinition & 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 ›PFAS in drinking water
69%
in the top 4.8% nationally
Lower is healthier
ST96thUS95thDefinition & 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 ›Recreation access
1.2 per 1,000 residents
in the top 5.5% nationally
Higher is healthier
ST91stUS95thDefinition & source ›
The number of places for physical recreation — gyms, sports, and fitness venues — 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 6.7% nationally
Lower is healthier
ST71stUS93rdDefinition & 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 ›Pharmacy access
0.42 per 1,000 residents
in the top 7.6% nationally
Higher is healthier
ST94thUS92ndDefinition & source ›
The number of pharmacies located 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 ›The read
In overall standing, Chester, California (ZIP 96020) comes out in the top 33% healthiest ZIPs nationally (10,503rd) and the top 48% of California (825th).
The measures fall on both sides of the ledger for this area: park land registers in the top 2.2% nationally, grocery stands in the top 2.2% nationally, and distance to a hazardous-chemical facility lands in the top 2.5% nationally. Dental providers is in the top 4.0% nationally, and modeled industrial-pollution burden resides in the bottom 4.2% nationally. Distance to an emergency room rests at the national minimum, shared with about 11% of ZIPs. Recreation lies in the top 5.5% nationally. Set against that, modeled fine-particle sits in the top 0.05% nationally, and pfas settles in the top 4.8% nationally. Modeled disaster risk registers in the top 6.7% nationally.
Relative to the ZIPs around it, park land runs far lower than the surrounding ZIPs on this measure. In plain terms, 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 hazardous-chemical facility is a plant handling large amounts of hazardous chemicals that must file an EPA risk-management plan for accidental releases. Industrial-pollution burden is the EPA's modeled screening score weighting industrial chemical releases by their toxicity and how many people live nearby. The nearest healthier ZIP overall is ZIP 95942, about 7.6 miles away.
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 73%
16%
Preventive Care
healthier than 76%
13%
Risk Behavior
healthier than 85%
11%
Climate / Disaster Risk
healthier than 92%
5%
About typical
Chronic Disease Burden
healthier than 45%
21%
Mental Health
healthier than 55%
8%
Disability
healthier than 53%
7%
Holding it back
Environmental Hazard
healthier than 12%
14%
Healthcare Access
healthier than 28%
5%
Lifting this score
Social Need / SDOH
healthier than 67%
16%
Preventive Care
healthier than 88%
13%
Risk Behavior
healthier than 70%
11%
Climate / Disaster Risk
healthier than 82%
5%
About typical
Environmental Hazard
healthier than 40%
14%
Mental Health
healthier than 48%
8%
Disability
healthier than 51%
7%
Holding it back
Chronic Disease Burden
healthier than 17%
21%
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
96137
Californiashares a border
Score 49.18
Closest healthier
95942
Californiaabout 7.6 mi away
Score 56.32
Similar health profile
95684
California98% similar profile
Score 52.85
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 | 32.2% | 28.2–36.0 |
| High blood pressure among adults | 38.9% | 34.1–43.3 |
| Cancer (non-skin) or melanoma among adults | 12.2% | 11.0–13.5 |
| Current asthma among adults | 10.6% | 9.3–11.9 |
| Coronary heart disease among adults | 8.4% | 7.4–9.5 |
| Chronic obstructive pulmonary disease among adults | 7.9% | 6.6–9.4 |
| Depression among adults | 23.3% | 19.8–27.1 |
| Diagnosed diabetes among adults | 12.3% | 10.5–14.2 |
| High cholesterol among adults who have ever been screened | 41.4% | 36.7–46.1 |
| Obesity among adults | 28.6% | 21.4–36.2 |
| Stroke among adults | 4.2% | 3.7–4.7 |
| All teeth lost among adults aged >=65 years | 7.3% | 5.8–9.1 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 5.5% | 4.3–6.9 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 77.9% | 74.3–81.0 |
| Visits to doctor for routine checkup within the past year among adults | 77.2% | 73.4–80.7 |
| Cholesterol screening among adults | 90.0% | 88.4–91.5 |
| Colorectal cancer screening among adults aged 45–75 years | 71.0% | 65.8–75.7 |
| Visited dentist or dental clinic in the past year among adults | 66.3% | 62.5–69.9 |
| Mammography use among women aged 50-74 years | 75.4% | 67.0–82.2 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 15.0% | 12.3–18.0 |
| Current cigarette smoking among adults | 12.3% | 9.9–14.8 |
| No leisure-time physical activity among adults | 21.7% | 17.4–26.3 |
| Short sleep duration among adults | 31.7% | 25.3–38.6 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 20.4% | 17.2–23.8 |
| Frequent mental distress among adults | 16.1% | 14.1–18.3 |
| Frequent physical distress among adults | 15.0% | 13.1–17.2 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 13.3% | 11.4–15.3 |
| Any disability among adults | 33.5% | 28.7–38.3 |
| Hearing disability among adults | 8.5% | 7.5–9.7 |
| Independent living disability among adults | 8.2% | 7.0–9.4 |
| Mobility disability among adults | 16.5% | 13.9–19.3 |
| Self-care disability among adults | 3.9% | 3.3–4.6 |
| Vision disability among adults | 4.6% | 3.9–5.2 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 23.1% | 19.3–27.0 |
| Food insecurity in the past 12 months among adults | 10.1% | 8.0–12.5 |
| Received food stamps in the past 12 months among adults | 9.9% | 7.7–12.3 |
| Housing insecurity in the past 12 months among adults | 8.5% | 7.0–10.2 |
| Lack of reliable transportation in the past 12 months among adults | 6.1% | 5.1–7.2 |
| Loneliness among adults | 32.7% | 27.3–37.9 |
| Utility services shut-off threat in the past 12 months among adults | 4.9% | 4.1–5.8 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 12.2% | 10.6% (3.1–25.8%) n=32,364 | 10.6% (4.1–24.9%) n=1,714 |
| Uninsured 18–64 | 1.2% | 9.0% (1.5–24.3%) n=32,286 | 7.7% (1.7–17.9%) n=1,704 |
| No HS diploma (25+) | 8.9% | 7.9% (1.8–20.7%) n=32,505 | 9.8% (1.4–30.9%) n=1,729 |
| Bachelor's or higher (25+) | 29.1% | 23.3% (9.2–53.6%) n=32,505 | 31.3% (9.9–68.2%) n=1,729 |
| Unemployment rate (16+) | 3.2% | 3.9% (0.0–9.8%) n=32,274 | 6.1% (0.8–12.0%) n=1,714 |
| Households without a vehicle | 9.7% | 3.9% (0.0–12.5%) n=32,322 | 4.5% (0.0–12.2%) n=1,708 |
| Broadband subscription | 94.2% | 89.3% (75.1–97.1%) n=32,322 | 93.4% (82.1–98.4%) n=1,708 |
| Housing cost burden (≥30% income) | 31.5% | 23.7% (10.6–40.0%) n=32,322 | 38.6% (24.4–50.5%) n=1,708 |
| Homeownership rate | 71.6% | 78.7% (51.7–94.0%) n=32,322 | 64.1% (31.9–86.4%) n=1,708 |
| Crowded housing (>1 per room) | 0.9% | 1.3% (0.0–6.3%) n=32,322 | 4.8% (0.0–15.9%) n=1,708 |
| Foreign-born population | 0.2% | 2.6% (0.0–18.6%) n=32,553 | 18.9% (3.0–40.4%) n=1,730 |
| Single-parent households | 73.6% | 53.6% (37.3–74.1%) n=32,087 | 48.4% (35.1–72.3%) n=1,692 |
| Population 65+ | 47.4% | 19.4% (10.8–33.6%) n=32,553 | 17.0% (9.7–35.7%) n=1,730 |
| Median age | 63.4 yr | 42.2 yr (33.0–56.3) n=32,292 | 40.1 yr (31.8–57.0) n=1,712 |
| Median household income | $50,489 | $72,070 ($46,039–$118,707) n=30,318 | $93,448 ($54,188–$159,562) n=1,584 |
| Median home value | $350,200 | $222,200 ($100,300–$579,820) n=30,049 | $659,800 ($300,520–$1,493,340) n=1,593 |
| Median gross rent | $1,130 | $1,021 ($677–$1,912) n=25,670 | $1,912 ($1,113–$2,923) n=1,461 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 77.5 yr ± 1.32 | 78.9 yr (74.7–82.8) n=31,308 | 80.5 yr (76.7–83.8) n=1,665 |
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 1.32 years of 77.5, 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