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ZIP code

95305

in Big Oak Flat, CaliforniaPopulation 267

ZipVitals Score
How is the ZipVitals Score calculated? →

47.72/ 100

Ranked #19,286 of 32,066 US ZIPs (bottom 40%)

Ranked #1,206 of 1,719 California ZIPs (bottom 30%)

Ranks are modeled estimates — ZIPs a few hundred places apart are effectively tied.

Robust across all 9 health domains

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.

Home broadband subscription

48.3%

in the bottom 1.4% nationally

Higher is healthier

ST1st
US1st
Definition & source ›

The share of households with a broadband internet subscription.

Full methodology ›

PFOS in drinking water

100%

at the national maximum

Lower is healthier

ST99th
US99th
Definition & source ›

The share of residents served by public water systems where PFOS, one of the most common “forever chemicals,” was 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 ›

Fine-particle (PM2.5) exceedance

3.1%

in the top 2.2% nationally

Lower is healthier

ST77th
US98th
Definition & 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

ST73rd
US96th
Definition & 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 ›

Loud transportation noise

2.7%

in the top 4.5% nationally

Lower is healthier

ST73rd
US96th
Definition & 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 ›

Distance to an emergency room

21.5 mi

in the top 4.6% nationally

Lower is healthier

ST96th
US95th
Definition & source ›

The distance in miles from this ZIP’s edge to the nearest Medicare-certified hospital with an emergency room.

Full methodology ›

PFAS in drinking water

100%

at the national maximum

Lower is healthier

ST99th
US99th
Definition & 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 ›

Housing-cost burden

6.9%

in the bottom 6.4% nationally

Lower is healthier

ST3rd
US6th
Definition & source ›

The share of households spending 30% or more of their income on housing.

Full methodology ›

Industrial-pollution burden

in the bottom 7.7% nationally

Lower is healthier

ST16th
US8th
Definition & 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 ›

Distance to a community health center

20.3 mi

in the top 8.1% nationally

Lower is healthier

ST97th
US92nd
Definition & source ›

The distance in miles from this ZIP’s edge to the nearest federally funded community health center, which serves patients regardless of ability to pay.

Full methodology ›

The read

Big Oak Flat, California (ZIP 95305) ranks in the bottom 40% nationally (19,286th) and the bottom 30% of California (1,206th).

continue reading

Several readings make the pressure on this area plain: home broadband subscription settles in the bottom 1.4% nationally, and PFOS in drinking water rests at the national maximum. Modeled fine-particle lands in the top 2.2% nationally, and air-toxics cancer risk settles in the top 4.5% nationally. Modeled loud transportation noise rests in the top 4.5% nationally, distance to an emergency room lands in the top 4.6% nationally, and PFAS in drinking water settles at the national maximum. On the encouraging side, housing-cost burden rests in the bottom 6.4% nationally. Unemployment lands at the national minimum, shared with about 15% of ZIPs. Modeled industrial-pollution burden settles in the bottom 7.7% nationally.

For context, PFOS in drinking water is a common one of the man-made "forever chemicals" that build up in the body and environment instead of breaking down. 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. The closest ZIP that ranks healthier overall is ZIP 95321, just across the boundary.

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.

Compare within

Lifting this score

Chronic Disease Burden

healthier than 62%

21%

Risk Behavior

healthier than 66%

11%

About typical

Preventive Care

healthier than 47%

13%

Disability

healthier than 51%

7%

Climate / Disaster Risk

healthier than 51%

5%

Holding it back

Social Need / SDOH

healthier than 27%

16%

Environmental Hazard

healthier than 2%

14%

Mental Health

healthier than 28%

8%

Healthcare Access

healthier than 7%

5%

Lifting this score

Preventive Care

healthier than 67%

13%

About typical

Risk Behavior

healthier than 42%

11%

Disability

healthier than 49%

7%

Holding it back

Chronic Disease Burden

healthier than 28%

21%

Social Need / SDOH

healthier than 31%

16%

Environmental Hazard

healthier than 10%

14%

Mental Health

healthier than 17%

8%

Climate / Disaster Risk

healthier than 39%

5%

Healthcare Access

healthier than 4%

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.

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
MeasureCrude prevalence95% CI
Arthritis among adults27.6%24.3–31.2
High blood pressure among adults35.2%31.0–39.5
Cancer (non-skin) or melanoma among adults9.9%9.0–10.9
Current asthma among adults10.7%9.5–12.1
Coronary heart disease among adults7.5%6.7–8.4
Chronic obstructive pulmonary disease among adults7.3%6.3–8.4
Depression among adults25.3%21.8–29.3
Diagnosed diabetes among adults11.4%9.7–13.1
High cholesterol among adults who have ever been screened37.8%33.6–42.5
Obesity among adults29.9%23.2–37.6
Stroke among adults3.8%3.5–4.2
All teeth lost among adults aged >=65 years10.5%8.5–13.0
PreventionCDC PLACES 2022 / 2023 · BRFSS
MeasureCrude prevalence95% CI
Current lack of health insurance among adults aged 18-64 years5.8%4.7–7.1
Taking medicine to control high blood pressure among adults with high blood pressure74.2%70.6–77.5
Visits to doctor for routine checkup within the past year among adults75.0%71.1–78.7
Cholesterol screening among adults88.1%86.5–89.6
Colorectal cancer screening among adults aged 45–75 years65.2%59.9–70.4
Visited dentist or dental clinic in the past year among adults65.9%62.4–69.4
Mammography use among women aged 50-74 years74.3%66.5–81.4
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
MeasureCrude prevalence95% CI
Binge drinking among adults16.9%14.0–20.3
Current cigarette smoking among adults13.5%11.3–16.0
No leisure-time physical activity among adults21.9%18.0–26.2
Short sleep duration among adults34.8%28.4–41.9
Health StatusCDC PLACES 2023 · BRFSS
MeasureCrude prevalence95% CI
Fair or poor self-rated health status among adults20.3%17.5–23.4
Frequent mental distress among adults17.9%15.8–20.1
Frequent physical distress among adults14.9%13.0–16.9
DisabilityCDC PLACES 2023 · BRFSS
MeasureCrude prevalence95% CI
Cognitive disability among adults14.7%12.8–16.8
Any disability among adults31.4%27.2–36.0
Hearing disability among adults7.8%6.9–8.8
Independent living disability among adults8.6%7.5–9.7
Mobility disability among adults15.4%13.3–17.7
Self-care disability among adults4.1%3.7–4.7
Vision disability among adults4.8%4.3–5.4
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
MeasureCrude prevalence95% CI
Lack of social and emotional support among adults23.5%19.7–27.3
Food insecurity in the past 12 months among adults12.0%9.8–14.4
Received food stamps in the past 12 months among adults12.5%10.2–14.9
Housing insecurity in the past 12 months among adults10.6%8.9–12.5
Lack of reliable transportation in the past 12 months among adults7.2%6.2–8.3
Loneliness among adults31.3%26.5–36.4
Utility services shut-off threat in the past 12 months among adults6.3%5.3–7.3
Community & economyCensus ACS 5-Year · 2024 release · observed
MeasureValueUS median (p10–p90)CA median (p10–p90)
Poverty rate12.4%10.6% (3.1–25.8%) n=32,36410.6% (4.1–24.9%) n=1,714
Uninsured 18–643.7%9.0% (1.5–24.3%) n=32,2867.7% (1.7–17.9%) n=1,704
No HS diploma (25+)0.0%7.9% (1.8–20.7%) n=32,5059.8% (1.4–30.9%) n=1,729
Bachelor's or higher (25+)6.8%23.3% (9.2–53.6%) n=32,50531.3% (9.9–68.2%) n=1,729
Unemployment rate (16+)0.0%3.9% (0.0–9.8%) n=32,2746.1% (0.8–12.0%) n=1,714
Households without a vehicle0.0%3.9% (0.0–12.5%) n=32,3224.5% (0.0–12.2%) n=1,708
Broadband subscription48.3%89.3% (75.1–97.1%) n=32,32293.4% (82.1–98.4%) n=1,708
Housing cost burden (≥30% income)6.9%23.7% (10.6–40.0%) n=32,32238.6% (24.4–50.5%) n=1,708
Homeownership rate48.3%78.7% (51.7–94.0%) n=32,32264.1% (31.9–86.4%) n=1,708
Crowded housing (>1 per room)0.0%1.3% (0.0–6.3%) n=32,3224.8% (0.0–15.9%) n=1,708
Foreign-born population6.4%2.6% (0.0–18.6%) n=32,55318.9% (3.0–40.4%) n=1,730
Single-parent households93.1%53.6% (37.3–74.1%) n=32,08748.4% (35.1–72.3%) n=1,692
Population 65+33.3%19.4% (10.8–33.6%) n=32,55317.0% (9.7–35.7%) n=1,730
Median age52.4 yr42.2 yr (33.0–56.3) n=32,29240.1 yr (31.8–57.0) n=1,712
Median household income—$72,070 ($46,039–$118,707) n=30,318$93,448 ($54,188–$159,562) n=1,584
Median home value—$222,200 ($100,300–$579,820) n=30,049$659,800 ($300,520–$1,493,340) n=1,593
Median gross rent—$1,021 ($677–$1,912) n=25,670$1,912 ($1,113–$2,923) n=1,461
Life expectancyNCHS / RWJF USALEEP · model-based
MeasureValueUS median (p10–p90)CA median (p10–p90)
Life expectancy at birth77.5 yr ± 1.4078.9 yr (74.7–82.8) n=31,30880.5 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 1.40 years of 77.5, and it’s very unlikely to be off by more than twice that.

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