ZIP code
92539
in Anza, CaliforniaPopulation 3,774
47.05/ 100
Ranked #20,107 of 32,066 US ZIPs (bottom 37%)
Ranked #1,224 of 1,719 California ZIPs (bottom 29%)
Ranked #89 of 153 Riverside-San Bernardino-Ontario, CA ZIPs (bottom 42%)
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.
Nitrate in drinking water
4.5%
in the top 4.4% nationally
Lower is healthier
ST88thUS96thDefinition & 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 ›Fiber broadband
98.9%
in the top 5.0% nationally
Higher is healthier
ST99thUS95thDefinition & source ›
The share of homes where fiber-optic internet service is available.
Full methodology ›Natural-disaster risk
in the top 5.8% nationally
Lower is healthier
ST75thUS94thDefinition & 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 ›Distance to a nursing home
12.6 mi
in the top 7.4% nationally
Lower is healthier
ST90thUS93rdDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest Medicare- or Medicaid-certified nursing home.
Full methodology ›Distance to an emergency room
16 mi
in the top 9.6% nationally
Lower is healthier
ST91stUS90thDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest Medicare-certified hospital with an emergency room.
Full methodology ›Transportation noise
0.49%
in the bottom 15% nationally
Lower is healthier
ST8thUS15thDefinition & source ›
The modeled share of residents exposed to average road, rail, and aviation noise at or above 55 decibels — a noticeable background presence.
Full methodology ›Binge drinking
13.1%
in the bottom 14.7% nationally
Lower is healthier
ST9thUS15thDefinition & source ›
The estimated share of adults who report binge drinking — five or more drinks on one occasion for men, four or more for women.
Full methodology ›High cholesterol
42.1%
in the top 15% nationally
Lower is healthier
ST92ndUS85thDefinition & source ›
The estimated share of adults with high cholesterol, among those who have ever been screened for it.
Full methodology ›Air-toxics cancer risk
20 per million
in the bottom 25% nationally
Lower is healthier
ST8thUS25thDefinition & 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 ›Energy-cost burden
4.2%
in the top 22% nationally
Lower is healthier
ST94thUS78thDefinition & 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
By the composite measure, Anza, California (ZIP 92539) sits in the bottom 37% nationally (20,107th) and the bottom 29% of California (1,224th).
The readings split fairly evenly between strengths and concerns: fiber broadband rests in the top 5.0% nationally, and distance to a hazardous-chemical facility sits in the top 11.0% nationally. Distance to a community health center registers at the national minimum, shared with about 23% of ZIPs. Floodplain exposure lands in the bottom 12.3% nationally. Working the other way, modeled nitrate resides in the top 4.4% nationally, and disaster risk lies in the top 5.8% nationally. Distance to a nursing home settles in the top 7.4% nationally, and distance to an emergency room stands in the top 9.6% nationally. Crowded housing is in the top 10.9% nationally, and fatal road crashes rests in the top 11.9% nationally.
Compared with the ZIPs that surround it, park land runs far lower than the surrounding ZIPs on this measure. In plain language, nitrate is a groundwater compound from fertilizer, manure, and sewage, here a modeled estimate of the chance private-well levels exceed a benchmark. Disaster risk is the area's national rank on its highest non-flood peril in FEMA's modeled Risk Index, like wildfire or quake. 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. ZIP 92004, just across the boundary, ranks healthier overall.
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 Riverside-San Bernardino-Ontario, CA metro area.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Environmental Hazard
healthier than 98%
14%
Climate / Disaster Risk
healthier than 83%
5%
About typical
Risk Behavior
healthier than 53%
11%
Holding it back
Chronic Disease Burden
healthier than 33%
21%
Social Need / SDOH
healthier than 14%
16%
Preventive Care
healthier than 33%
13%
Mental Health
healthier than 37%
8%
Disability
healthier than 22%
7%
Healthcare Access
healthier than 33%
5%
Lifting this score
Environmental Hazard
healthier than 97%
14%
Climate / Disaster Risk
healthier than 64%
5%
About typical
Preventive Care
healthier than 56%
13%
Holding it back
Chronic Disease Burden
healthier than 12%
21%
Social Need / SDOH
healthier than 20%
16%
Risk Behavior
healthier than 29%
11%
Mental Health
healthier than 28%
8%
Disability
healthier than 22%
7%
Healthcare Access
healthier than 20%
5%
Lifting this score
Environmental Hazard
healthier than 95%
14%
Preventive Care
healthier than 74%
13%
Climate / Disaster Risk
healthier than 91%
5%
About typical
Risk Behavior
healthier than 44%
11%
Holding it back
Chronic Disease Burden
healthier than 20%
21%
Social Need / SDOH
healthier than 34%
16%
Mental Health
healthier than 35%
8%
Disability
healthier than 32%
7%
Healthcare Access
healthier than 15%
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.
Clean environment, heavy chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 97.6 (top 10%); chronic-disease standing 32.8 — 65 points apart, cleaner on the environment than it is on chronic illness.
Ranked #1,404 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
92004
Californiashares a border
Score 56.17
Closest healthier
92086
Californiashares a border
Score 54.45
Similar health profile
81244
Colorado95% similar profile
Score 45.55
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 | 31.7% | 29.0–34.4 |
| High blood pressure among adults | 40.3% | 37.3–43.4 |
| Cancer (non-skin) or melanoma among adults | 8.9% | 8.1–9.7 |
| Current asthma among adults | 10.5% | 9.3–11.7 |
| Coronary heart disease among adults | 8.5% | 7.6–9.4 |
| Chronic obstructive pulmonary disease among adults | 8.6% | 7.5–9.8 |
| Depression among adults | 23.7% | 21.1–26.6 |
| Diagnosed diabetes among adults | 15.1% | 13.4–16.9 |
| High cholesterol among adults who have ever been screened | 42.1% | 39.0–45.3 |
| Obesity among adults | 37.7% | 33.6–42.1 |
| Stroke among adults | 4.4% | 4.1–4.9 |
| All teeth lost among adults aged >=65 years | 12.9% | 10.6–15.6 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 9.6% | 8.3–11.2 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 75.3% | 72.3–78.0 |
| Visits to doctor for routine checkup within the past year among adults | 74.7% | 71.8–77.5 |
| Cholesterol screening among adults | 86.9% | 85.4–88.3 |
| Colorectal cancer screening among adults aged 45–75 years | 61.2% | 56.8–65.6 |
| Visited dentist or dental clinic in the past year among adults | 61.5% | 58.4–64.7 |
| Mammography use among women aged 50-74 years | 77.1% | 70.9–82.5 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 13.1% | 11.2–15.2 |
| Current cigarette smoking among adults | 15.4% | 13.3–17.7 |
| No leisure-time physical activity among adults | 28.8% | 25.4–32.3 |
| Short sleep duration among adults | 38.1% | 34.0–42.3 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 27.2% | 24.4–30.1 |
| Frequent mental distress among adults | 17.8% | 16.0–19.7 |
| Frequent physical distress among adults | 17.6% | 15.8–19.6 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 16.6% | 14.8–18.5 |
| Any disability among adults | 38.9% | 35.3–42.4 |
| Hearing disability among adults | 8.5% | 7.6–9.5 |
| Independent living disability among adults | 10.6% | 9.4–11.8 |
| Mobility disability among adults | 20.5% | 18.3–22.9 |
| Self-care disability among adults | 5.3% | 4.8–5.9 |
| Vision disability among adults | 6.8% | 6.2–7.5 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 27.3% | 24.2–30.4 |
| Food insecurity in the past 12 months among adults | 19.5% | 17.0–22.1 |
| Received food stamps in the past 12 months among adults | 18.0% | 15.6–20.4 |
| Housing insecurity in the past 12 months among adults | 15.4% | 13.5–17.4 |
| Lack of reliable transportation in the past 12 months among adults | 10.0% | 8.8–11.2 |
| Loneliness among adults | 35.2% | 31.6–38.7 |
| Utility services shut-off threat in the past 12 months among adults | 8.3% | 7.3–9.5 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 9.5% | 10.6% (3.1–25.8%) n=32,364 | 10.6% (4.1–24.9%) n=1,714 |
| Uninsured 18–64 | 14.3% | 9.0% (1.5–24.3%) n=32,286 | 7.7% (1.7–17.9%) n=1,704 |
| No HS diploma (25+) | 18.0% | 7.9% (1.8–20.7%) n=32,505 | 9.8% (1.4–30.9%) n=1,729 |
| Bachelor's or higher (25+) | 14.3% | 23.3% (9.2–53.6%) n=32,505 | 31.3% (9.9–68.2%) n=1,729 |
| Unemployment rate (16+) | 6.9% | 3.9% (0.0–9.8%) n=32,274 | 6.1% (0.8–12.0%) n=1,714 |
| Households without a vehicle | 5.7% | 3.9% (0.0–12.5%) n=32,322 | 4.5% (0.0–12.2%) n=1,708 |
| Broadband subscription | 88.5% | 89.3% (75.1–97.1%) n=32,322 | 93.4% (82.1–98.4%) n=1,708 |
| Housing cost burden (≥30% income) | 32.6% | 23.7% (10.6–40.0%) n=32,322 | 38.6% (24.4–50.5%) n=1,708 |
| Homeownership rate | 79.8% | 78.7% (51.7–94.0%) n=32,322 | 64.1% (31.9–86.4%) n=1,708 |
| Crowded housing (>1 per room) | 5.9% | 1.3% (0.0–6.3%) n=32,322 | 4.8% (0.0–15.9%) n=1,708 |
| Foreign-born population | 11.6% | 2.6% (0.0–18.6%) n=32,553 | 18.9% (3.0–40.4%) n=1,730 |
| Single-parent households | 71.2% | 53.6% (37.3–74.1%) n=32,087 | 48.4% (35.1–72.3%) n=1,692 |
| Population 65+ | 17.2% | 19.4% (10.8–33.6%) n=32,553 | 17.0% (9.7–35.7%) n=1,730 |
| Median age | 35.8 yr | 42.2 yr (33.0–56.3) n=32,292 | 40.1 yr (31.8–57.0) n=1,712 |
| Median household income | $90,394 | $72,070 ($46,039–$118,707) n=30,318 | $93,448 ($54,188–$159,562) n=1,584 |
| Median home value | $350,000 | $222,200 ($100,300–$579,820) n=30,049 | $659,800 ($300,520–$1,493,340) n=1,593 |
| Median gross rent | $1,472 | $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 | 78.1 yr ± 1.07 | 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 1.07 years of 78.1, 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