ZIP code
91791
in West Covina, CaliforniaPopulation 33,028
58.77/ 100
Ranked #5,773 of 32,066 US ZIPs (top 18%)
Ranked #573 of 1,719 California ZIPs (top 33%)
Ranked #178 of 371 Los Angeles-Long Beach-Anaheim, CA 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.
Outer-floodplain exposure
85%
in the top 0.4% nationally
Lower is healthier
ST99thUS99thDefinition & 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 ›Obesity
23%
in the bottom 3.0% nationally
Lower is healthier
ST16thUS3rdDefinition & source ›
The estimated share of adults with obesity, defined as a body-mass index of 30 or higher.
Full methodology ›Loud transportation noise
4.1%
in the top 2.0% nationally
Lower is healthier
ST86thUS98thDefinition & source ›
The modeled share of residents exposed to average road, rail, and aviation noise at or above 65 decibels — around the volume of normal conversation.
Full methodology ›Loneliness
40.2%
in the top 3.8% nationally
Lower is healthier
ST84thUS96thDefinition & source ›
The estimated share of adults who report feeling lonely.
Full methodology ›Fine-particle (PM2.5) exceedance
2.2%
in the top 4.0% nationally
Lower is healthier
ST68thUS96thDefinition & 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 ›Air-toxics cancer risk
40 per million
in the top 4.5% nationally
Lower is healthier
ST73rdUS96thDefinition & 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 ›PFAS in drinking water
100%
at the national maximum
Lower is healthier
ST99thUS99thDefinition & source ›
The share of residents served by public water systems where PFAS — man-made “forever chemicals” that build up in the body and environment instead of breaking down — were detected in EPA testing.
Measured from EPA records for the public water systems that serve this ZIP. Households on private wells — roughly 30% of the US population — are not covered by this measure, and this figure says nothing about their water.
Full methodology ›Walkability
130 intersections/sq mi
in the top 6.5% nationally
Higher is healthier
ST82ndUS94thDefinition & source ›
The number of street intersections per square mile — a standard street-connectivity measure; denser networks correlate with more walkable neighborhoods.
Full methodology ›Colon-cancer screening
56.7%
in the bottom 6.9% nationally
Higher is healthier
ST28thUS7thDefinition & source ›
The estimated share of adults aged 45–75 who are up to date on colorectal-cancer screening.
Full methodology ›Transportation noise
10.8%
in the top 7.5% nationally
Lower is healthier
ST77thUS93rdDefinition & 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 ›The read
ZIP 91791, one of several in West Covina, California, overall, ranks in the top 18% healthiest ZIPs nationally (5,773rd) and the top 33% of California (573rd).
Reading the numbers as a whole, the picture lands somewhere in between: modeled obesity is in the bottom 3.0% nationally, and walkability sits in the top 6.5% nationally. On the other side, outer-floodplain exposure lands in the top 0.4% nationally, modeled loud transportation noise lies in the top 2.0% nationally, and modeled loneliness stands in the top 3.8% nationally. Modeled fine-particle rests in the top 4.0% nationally, and air-toxics cancer risk registers in the top 4.5% nationally. PFAS in drinking water resides at the national maximum, and modeled colon screening settles in the bottom 6.9% nationally. Modeled transportation noise is in the top 7.5% nationally.
Measured against the nearby ZIPs, outer-floodplain exposure runs far higher than the surrounding ZIPs on this measure. Defined simply, fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. Air-toxics cancer risk is a modeled EPA estimate of added lifetime cancer risk from breathing outdoor air, per million people. PFAS in drinking water is the family of man-made "forever chemicals" that build up in the body and environment instead of breaking down. ZIP 91789, just across the boundary, comes out 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 Los Angeles-Long Beach-Anaheim, CA 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 93%
21%
Risk Behavior
healthier than 85%
11%
Mental Health
healthier than 95%
8%
Disability
healthier than 71%
7%
Healthcare Access
healthier than 85%
5%
About typical
Social Need / SDOH
healthier than 56%
16%
Holding it back
Environmental Hazard
healthier than 1%
14%
Preventive Care
healthier than 22%
13%
Climate / Disaster Risk
healthier than 39%
5%
Lifting this score
Chronic Disease Burden
healthier than 80%
21%
Risk Behavior
healthier than 69%
11%
Mental Health
healthier than 95%
8%
Disability
healthier than 65%
7%
Healthcare Access
healthier than 69%
5%
About typical
Social Need / SDOH
healthier than 55%
16%
Preventive Care
healthier than 44%
13%
Holding it back
Environmental Hazard
healthier than 6%
14%
Climate / Disaster Risk
healthier than 32%
5%
Lifting this score
Chronic Disease Burden
healthier than 62%
21%
Risk Behavior
healthier than 64%
11%
Mental Health
healthier than 90%
8%
About typical
Social Need / SDOH
healthier than 49%
16%
Preventive Care
healthier than 52%
13%
Disability
healthier than 52%
7%
Healthcare Access
healthier than 44%
5%
Holding it back
Environmental Hazard
healthier than 23%
14%
Climate / Disaster Risk
healthier than 7%
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
3 of our published findings list 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.
Above what income predicts
The ZIP codes that outlive their incomes
Estimated life expectancy is 83.1 ± 1.2 years. A median household income of $102,266 predicts 80.2 years — 2.9 years above.
Ranked #465 of the 5,842 ZIP codes this finding names, ordered by years above what income predicts, highest first.
Heavy environment, light chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 1.1 (bottom 10%); chronic-disease standing 93.4 (top 10%) — 92 points apart, heavier on the environment than it is on chronic illness.
Ranked #18,001 of the 18,187 ZIP codes this finding names, ordered by the gap from cleanest environment to heaviest chronic burden, highest first.
Highest-risk tenth
Air toxics and the years between the two ends of the risk scale
Modeled air-toxics cancer risk is 40.0 cases per million — among the tenth of compared ZIP codes with the most. Estimated life expectancy is 83.1 ± 1.2 years.
Ranked #504 of the 4,173 ZIP codes this finding names, ordered by modeled air-toxics risk, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
91722
Californiashares a border
Score 55.74
Closest healthier
91789
Californiashares a border
Score 68.43
Similar health profile
95133
California98% similar profile
Score 60.79
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 | 19.1% | 17.7–20.7 |
| High blood pressure among adults | 29.5% | 27.6–31.6 |
| Cancer (non-skin) or melanoma among adults | 5.7% | 5.3–6.3 |
| Current asthma among adults | 8.1% | 7.3–8.9 |
| Coronary heart disease among adults | 5.1% | 4.7–5.6 |
| Chronic obstructive pulmonary disease among adults | 4.1% | 3.7–4.5 |
| Depression among adults | 16.4% | 14.8–18.1 |
| Diagnosed diabetes among adults | 12.6% | 11.5–13.9 |
| High cholesterol among adults who have ever been screened | 38.3% | 36.1–40.6 |
| Obesity among adults | 23.0% | 20.6–25.6 |
| Stroke among adults | 3.0% | 2.8–3.2 |
| All teeth lost among adults aged >=65 years | 8.7% | 7.1–10.3 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 10.4% | 9.0–11.8 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 73.8% | 71.4–76.0 |
| Visits to doctor for routine checkup within the past year among adults | 73.2% | 70.9–75.3 |
| Cholesterol screening among adults | 86.6% | 85.2–87.8 |
| Colorectal cancer screening among adults aged 45–75 years | 56.7% | 53.1–59.8 |
| Visited dentist or dental clinic in the past year among adults | 63.6% | 61.1–65.8 |
| Mammography use among women aged 50-74 years | 75.4% | 70.3–79.7 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 13.7% | 12.2–15.2 |
| Current cigarette smoking among adults | 8.9% | 7.9–10.0 |
| No leisure-time physical activity among adults | 25.2% | 22.9–27.5 |
| Short sleep duration among adults | 35.1% | 32.2–37.9 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 21.5% | 19.9–23.3 |
| Frequent mental distress among adults | 14.1% | 12.9–15.4 |
| Frequent physical distress among adults | 12.9% | 11.8–14.1 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 13.0% | 11.9–14.3 |
| Any disability among adults | 29.0% | 26.9–31.2 |
| Hearing disability among adults | 5.6% | 5.1–6.2 |
| Independent living disability among adults | 7.2% | 6.5–7.9 |
| Mobility disability among adults | 13.4% | 12.3–14.7 |
| Self-care disability among adults | 3.7% | 3.4–4.0 |
| Vision disability among adults | 5.6% | 5.2–6.1 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 31.7% | 29.4–34.3 |
| Food insecurity in the past 12 months among adults | 17.4% | 15.7–19.3 |
| Received food stamps in the past 12 months among adults | 13.2% | 11.7–14.8 |
| Housing insecurity in the past 12 months among adults | 14.3% | 12.8–15.9 |
| Lack of reliable transportation in the past 12 months among adults | 8.4% | 7.5–9.3 |
| Loneliness among adults | 40.2% | 37.5–43.0 |
| Utility services shut-off threat in the past 12 months among adults | 5.8% | 5.1–6.5 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 9.1% | 10.6% (3.1–25.8%) n=32,364 | 10.6% (4.1–24.9%) n=1,714 |
| Uninsured 18–64 | 6.5% | 9.0% (1.5–24.3%) n=32,286 | 7.7% (1.7–17.9%) n=1,704 |
| No HS diploma (25+) | 13.7% | 7.9% (1.8–20.7%) n=32,505 | 9.8% (1.4–30.9%) n=1,729 |
| Bachelor's or higher (25+) | 33.4% | 23.3% (9.2–53.6%) n=32,505 | 31.3% (9.9–68.2%) n=1,729 |
| Unemployment rate (16+) | 8.6% | 3.9% (0.0–9.8%) n=32,274 | 6.1% (0.8–12.0%) n=1,714 |
| Households without a vehicle | 6.0% | 3.9% (0.0–12.5%) n=32,322 | 4.5% (0.0–12.2%) n=1,708 |
| Broadband subscription | 91.3% | 89.3% (75.1–97.1%) n=32,322 | 93.4% (82.1–98.4%) n=1,708 |
| Housing cost burden (≥30% income) | 41.1% | 23.7% (10.6–40.0%) n=32,322 | 38.6% (24.4–50.5%) n=1,708 |
| Homeownership rate | 64.5% | 78.7% (51.7–94.0%) n=32,322 | 64.1% (31.9–86.4%) n=1,708 |
| Crowded housing (>1 per room) | 6.3% | 1.3% (0.0–6.3%) n=32,322 | 4.8% (0.0–15.9%) n=1,708 |
| Foreign-born population | 36.5% | 2.6% (0.0–18.6%) n=32,553 | 18.9% (3.0–40.4%) n=1,730 |
| Single-parent households | 48.2% | 53.6% (37.3–74.1%) n=32,087 | 48.4% (35.1–72.3%) n=1,692 |
| Population 65+ | 20.7% | 19.4% (10.8–33.6%) n=32,553 | 17.0% (9.7–35.7%) n=1,730 |
| Median age | 43.4 yr | 42.2 yr (33.0–56.3) n=32,292 | 40.1 yr (31.8–57.0) n=1,712 |
| Median household income | $102,266 | $72,070 ($46,039–$118,707) n=30,318 | $93,448 ($54,188–$159,562) n=1,584 |
| Median home value | $843,600 | $222,200 ($100,300–$579,820) n=30,049 | $659,800 ($300,520–$1,493,340) n=1,593 |
| Median gross rent | $1,915 | $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 | 83.1 yr ± 0.61 | 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 0.61 years of 83.1, 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