ZIP code
95948
in Gridley, CaliforniaPopulation 11,200
41.79/ 100
Ranked #25,393 of 32,066 US ZIPs (bottom 21%)
Ranked #1,442 of 1,719 California ZIPs (bottom 16%)
Ranked #12 of 18 Chico, CA 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.
Outer-floodplain exposure
82.5%
in the top 0.5% 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 ›Air-toxics cancer risk
49.6 per million
in the top 1.1% nationally
Lower is healthier
ST92ndUS99thDefinition & 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 ›Fine-particle (PM2.5) exceedance
3.0%
in the top 2.2% nationally
Lower is healthier
ST77thUS98thDefinition & 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 ›Dry extreme heat
86.7 days/year
in the top 3.9% nationally
Lower is healthier
ST88thUS96thDefinition & source ›
The average number of days per year with a modeled daily high of at least 95 °F.
Full methodology ›Natural-disaster risk
in the top 3.9% nationally
Lower is healthier
ST84thUS96thDefinition & 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 ›Transportation noise
10.6%
in the top 7.8% nationally
Lower is healthier
ST76thUS92ndDefinition & 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 ›Unemployment rate
10.8%
in the top 8.3% nationally
Lower is healthier
ST87thUS92ndDefinition & source ›
The share of the civilian labor force that is unemployed.
Full methodology ›Colon-cancer screening
57.8%
in the bottom 8.8% nationally
Higher is healthier
ST32ndUS9thDefinition & source ›
The estimated share of adults aged 45–75 who are up to date on colorectal-cancer screening.
Full methodology ›Tree cover
0.00%
in the bottom 9.9% nationally
Higher is healthier
ST39thUS10thDefinition & source ›
The share of this ZIP’s land area covered by forest.
Full methodology ›The read
By the composite health measure, Gridley, California (ZIP 95948) ranks in the bottom 21% nationally (25,393rd) and the bottom 16% of California (1,442nd).
Several measures weigh most on this area's profile, and they come first: outer-floodplain exposure sits in the top 0.5% nationally, and modeled air-toxics cancer risk is in the top 1.1% nationally. Modeled fine-particle settles in the top 2.2% nationally, and extreme heat resides in the top 3.9% nationally. Modeled disaster risk registers in the top 3.9% nationally, modeled transportation noise rests in the top 7.8% nationally, and unemployment stands in the top 8.3% nationally. Fiber broadband lies at the national minimum, shared with about 19% of ZIPs. Modeled colon screening lands in the bottom 8.8% nationally. On the better side, distance to an emergency room sits at the national minimum, shared with about 11% of ZIPs.
Read against the ZIPs closest to it, outer-floodplain exposure runs far higher than the surrounding ZIPs on this measure. To spell things out, air-toxics cancer risk is a modeled EPA estimate of added lifetime cancer risk from breathing outdoor air, per million people. Fine-particle is fine airborne particles about one-thirtieth the width of a hair, counted on modeled days above the EPA standard. Disaster risk is the area's national rank on its highest non-flood peril in FEMA's modeled Risk Index, like wildfire or quake. Close by, ZIP 95917, 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 Chico, 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 61%
21%
Healthcare Access
in the top 0.00%
5%
About typical
Risk Behavior
healthier than 47%
11%
Holding it back
Social Need / SDOH
healthier than 20%
16%
Environmental Hazard
healthier than 2%
14%
Preventive Care
healthier than 10%
13%
Mental Health
healthier than 24%
8%
Disability
healthier than 21%
7%
Climate / Disaster Risk
healthier than 13%
5%
Lifting this score
Healthcare Access
in the top 0.00%
5%
Holding it back
Chronic Disease Burden
healthier than 27%
21%
Social Need / SDOH
healthier than 26%
16%
Environmental Hazard
healthier than 13%
14%
Preventive Care
healthier than 29%
13%
Risk Behavior
healthier than 25%
11%
Mental Health
healthier than 14%
8%
Disability
healthier than 20%
7%
Climate / Disaster Risk
healthier than 12%
5%
Lifting this score
Chronic Disease Burden
healthier than 63%
21%
Mental Health
healthier than 69%
8%
Healthcare Access
in the top 0.00%
5%
Holding it back
Social Need / SDOH
healthier than 31%
16%
Environmental Hazard
healthier than 19%
14%
Preventive Care
healthier than 13%
13%
Risk Behavior
healthier than 25%
11%
Disability
healthier than 31%
7%
Climate / Disaster Risk
healthier than 38%
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
2 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.
Heavy environment, light chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 2.6 (bottom 10%); chronic-disease standing 60.8 — 58 points apart, heavier on the environment than it is on chronic illness.
Ranked #15,237 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 49.6 cases per million — among the tenth of compared ZIP codes with the most. Estimated life expectancy is 76.9 ± 1.6 years.
Ranked #196 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
95917
Californiashares a border
Score 46.90
Closest healthier
95932
Californiashares a border
Score 42.79
Similar health profile
93309
California97% similar profile
Score 41.94
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 | 25.3% | 22.5–28.3 |
| High blood pressure among adults | 35.2% | 31.4–39.1 |
| Cancer (non-skin) or melanoma among adults | 7.7% | 7.0–8.4 |
| Current asthma among adults | 10.4% | 9.2–11.6 |
| Coronary heart disease among adults | 7.5% | 6.8–8.3 |
| Chronic obstructive pulmonary disease among adults | 7.8% | 6.9–8.7 |
| Depression among adults | 24.3% | 20.9–27.8 |
| Diagnosed diabetes among adults | 13.5% | 11.8–15.4 |
| High cholesterol among adults who have ever been screened | 35.8% | 31.9–39.9 |
| Obesity among adults | 32.8% | 26.4–39.6 |
| Stroke among adults | 4.1% | 3.8–4.5 |
| All teeth lost among adults aged >=65 years | 14.7% | 12.0–17.6 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 13.4% | 11.4–15.6 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 72.2% | 69.1–75.2 |
| Visits to doctor for routine checkup within the past year among adults | 72.1% | 68.2–75.9 |
| Cholesterol screening among adults | 83.7% | 81.8–85.7 |
| Colorectal cancer screening among adults aged 45–75 years | 57.8% | 52.5–62.7 |
| Visited dentist or dental clinic in the past year among adults | 55.5% | 51.9–59.1 |
| Mammography use among women aged 50-74 years | 72.6% | 64.5–79.7 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.3% | 13.5–19.3 |
| Current cigarette smoking among adults | 15.0% | 12.9–17.2 |
| No leisure-time physical activity among adults | 29.1% | 24.7–33.4 |
| Short sleep duration among adults | 34.5% | 28.5–40.7 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 27.6% | 24.5–30.7 |
| Frequent mental distress among adults | 19.1% | 17.0–21.2 |
| Frequent physical distress among adults | 16.6% | 14.8–18.6 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 18.0% | 16.0–20.0 |
| Any disability among adults | 37.0% | 32.7–41.1 |
| Hearing disability among adults | 8.0% | 7.1–8.9 |
| Independent living disability among adults | 10.9% | 9.7–12.1 |
| Mobility disability among adults | 18.4% | 16.3–20.7 |
| Self-care disability among adults | 5.5% | 5.0–6.0 |
| Vision disability among adults | 7.7% | 7.0–8.4 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 26.8% | 23.3–30.5 |
| Food insecurity in the past 12 months among adults | 22.7% | 19.9–25.9 |
| Received food stamps in the past 12 months among adults | 22.8% | 20.2–25.9 |
| Housing insecurity in the past 12 months among adults | 18.2% | 16.1–20.7 |
| Lack of reliable transportation in the past 12 months among adults | 11.8% | 10.5–13.3 |
| Loneliness among adults | 35.2% | 30.3–40.2 |
| Utility services shut-off threat in the past 12 months among adults | 10.1% | 8.9–11.5 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | CA median (p10–p90) |
|---|---|---|---|
| Poverty rate | 18.5% | 10.6% (3.1–25.8%) n=32,364 | 10.6% (4.1–24.9%) n=1,714 |
| Uninsured 18–64 | 14.7% | 9.0% (1.5–24.3%) n=32,286 | 7.7% (1.7–17.9%) n=1,704 |
| No HS diploma (25+) | 20.4% | 7.9% (1.8–20.7%) n=32,505 | 9.8% (1.4–30.9%) n=1,729 |
| Bachelor's or higher (25+) | 16.9% | 23.3% (9.2–53.6%) n=32,505 | 31.3% (9.9–68.2%) n=1,729 |
| Unemployment rate (16+) | 10.8% | 3.9% (0.0–9.8%) n=32,274 | 6.1% (0.8–12.0%) n=1,714 |
| Households without a vehicle | 5.0% | 3.9% (0.0–12.5%) n=32,322 | 4.5% (0.0–12.2%) n=1,708 |
| Broadband subscription | 92.3% | 89.3% (75.1–97.1%) n=32,322 | 93.4% (82.1–98.4%) n=1,708 |
| Housing cost burden (≥30% income) | 34.2% | 23.7% (10.6–40.0%) n=32,322 | 38.6% (24.4–50.5%) n=1,708 |
| Homeownership rate | 56.3% | 78.7% (51.7–94.0%) n=32,322 | 64.1% (31.9–86.4%) n=1,708 |
| Crowded housing (>1 per room) | 6.2% | 1.3% (0.0–6.3%) n=32,322 | 4.8% (0.0–15.9%) n=1,708 |
| Foreign-born population | 18.0% | 2.6% (0.0–18.6%) n=32,553 | 18.9% (3.0–40.4%) n=1,730 |
| Single-parent households | 46.3% | 53.6% (37.3–74.1%) n=32,087 | 48.4% (35.1–72.3%) n=1,692 |
| Population 65+ | 14.3% | 19.4% (10.8–33.6%) n=32,553 | 17.0% (9.7–35.7%) n=1,730 |
| Median age | 35.2 yr | 42.2 yr (33.0–56.3) n=32,292 | 40.1 yr (31.8–57.0) n=1,712 |
| Median household income | $60,294 | $72,070 ($46,039–$118,707) n=30,318 | $93,448 ($54,188–$159,562) n=1,584 |
| Median home value | $354,100 | $222,200 ($100,300–$579,820) n=30,049 | $659,800 ($300,520–$1,493,340) n=1,593 |
| Median gross rent | $1,210 | $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 | 76.9 yr ± 0.84 | 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 0.84 years of 76.9, 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