Population & age
- Total population
- 568
- Median age
- 51.3
Keller, WA (99140)
Ferry County · Population 568
Fresh.Data current as of Apr 24, 2026
Keller, WA (ZIP 99140) sits in Ferry County. The page draws on 2 federal data feeds retrieved Apr 27. Top health signal: Obesity comes in above the national average at 42.3%. NCES lists 1 schools serving the area, 1 non-charter. 2 colleges and universities serve the area, with median in-state tuition of $12,535. 27% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. BLS LAUS records a 7.7% county unemployment rate (2024) — about 3.7 points above the US average and a labor-market distress signal. CDC's Social Vulnerability Index places this ZIP in the 84th percentile nationally — a highly vulnerable community profile. FEMA has issued 22 federal disaster declarations affecting this ZIP since 1974 — a high-frequency exposure profile. Annual average temperature is just 43.8°F per NOAA's 1991–2020 Climate Normals — a notably cold-weather climate. County Health Rankings reports 13,026 years of potential life lost per 100,000 (2025) — well above the national county median. Per USDA's Food Environment Atlas, 48.6% of residents in this county live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket — a deep food-access gap. Washington has no state income tax, saving the local median household (AGI $45,913) approximately $2,112/year vs the US average effective state tax rate. New residents arriving here predominantly come from Spokane County, WA (IRS SOI Migration, 2022-2023). Healthcare access is the area's quieter strength; school options sit on the lighter side, so families may find themselves looking at districts a few ZIPs over. Notable: median household income $50,430, fair market rent of $1,140 for a two-bedroom, and a median home value of $139,300. Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
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Demographics
Race & ethnicity
- White
- 22.5%
- Black
- 0.4%
- Asian
- 0.0%
- Hispanic / Latino
- 3.5%
- Other / multi-racial
- 11.4%
Income & housing
- Median household income
- $50,430
- Median home value
- $139,300
Education
- Bachelor's degree or higher (age 25+)
- 9.4%
Employment
- Unemployment rate
- 5.8%
Housing
- Owner-occupied
- 185(72.5%)
- Renter-occupied
- 70(27.5%)
- Vacant units
- 48
- Built (median)
- 1976
Commute
- Public transit
- 0(0.0%)
- Work from home
- 12(5.4%)
- Avg commute
- 24.6 min
Economic wellbeing
- Below poverty line
- 108(19.0%)
- Uninsured
- 17(3.0%)
Digital access
- Broadband access
- 173(67.8%)
- No broadband
- 82(32.2%)
Language & nativity
- Foreign-born
- 6(1.1%)
- Non-English at home
- 19(3.5%)
Fair Market Rent
Fresh.HUD SAFMR · May 1, 2026Studio
$800
/month
1 Bed
$870
/month
2 Bed
$1,140
/month
3 Bed
$1,580
/month
4 Bed
$1,870
/month
HUD Fair Market Rents represent the 40th percentile of standard-quality rental housing in this area. FY2026 data.
New housing construction
New housing units permitted
20
Across 20 permitted buildings. Total construction value: $4.2M.
Single-family
20
100% of total units
Multifamily (2+ unit)
0
0% of total units
Single-family value
$4.2M
construction value
Multifamily value
$0
construction value
Based on county-level data (2024).
Source: U.S. Census Bureau Building Permits Survey (census.gov/construction/bps). Public domain. BPS reports annual residential building permits from local permit-issuing jurisdictions, aggregated to county. A permit reflects intent to build, not a completed unit — actual construction lags by 6-24 months for multifamily projects.
Income & tax statistics
Tax returns filed
150
Average AGI
$45,913
Avg property tax
—
EITC participation
26.7%
Income distribution
- $1 – $25,00033.3% · 50
- $25,000 – $50,00033.3% · 50
- $50,000 – $75,00020.0% · 30
- $75,000 – $100,00013.3% · 20
- $100,000 – $200,0000.0% · 0
- $200,000 or more0.0% · 0
Avg mortgage interest
—
Avg charitable contribution
—
Avg capital gains
—
Avg total income tax
—
Source: IRS Statistics of Income — Individual Income Tax Statistics by ZIP Code (irs.gov). Public domain. Dollar columns reported in thousands by the IRS; figures here display real dollars. Total ZCTA AGI for the area was $6.9M across all reported brackets.
Business & employment
Business establishments
7
Total employment
25
Annual payroll
$1.9M
Average annual pay
$74,400
Source: U.S. Census Bureau, ZIP Business Patterns (census.gov). Public domain. ZBP covers establishments with paid employees; Census suppresses employment and payroll values when fewer employers operate in a ZIP than would protect their confidentiality.
Employment & wages
Average annual pay
$52,738
Average weekly wage
$1,014
Total employment
1,713
Total establishments
271
That is roughly 19% below the US national average of $65,470 per worker.
Source: U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages (bls.gov/cew). Public domain. QCEW is derived from state unemployment-insurance filings and covers ~95% of US jobs. Figures are county-level totals assigned to ZIPs whose primary county matches; small-employer cells are suppressed by BLS to protect employer confidentiality.
Unemployment
Unemployment rate
7.7%
That is 3.7 percentage points above the US national unemployment rate of about 4.0%.
Labor force
2,391
Employed
2,208
Unemployed
183
Based on Ferry County, WA data (2024).
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics (bls.gov/lau). Public domain. LAUS publishes monthly and annual labor-force estimates for every US county. Figures are county-level totals assigned to ZIPs whose primary county matches.
Community health centers
Federally funded health-center sites
1
Single health-center site
One federally funded community health center serves this ZIP. Residents who need same-day care or specialty services may rely on neighboring ZIPs.
FQHC sites
1
federally qualified
Look-Alike sites
0
FQHC equivalents
Avg hours / week
28.5
across sites in this ZIP
Sites in this ZIP
- 1.SAN POIL VALLEY COMMUNITY HEALTH
Federally Qualified Health Centers (FQHCs) and Look-Alike sites provide primary care on a sliding-fee scale, regardless of ability to pay. Active sites only; data refreshed 2026.
Source: HRSA Bureau of Primary Health Care (data.hrsa.gov). Per-ZIP counts of active service-delivery sites operated by Health Center Program grantees and Look-Alike organizations.
Federal Disaster Declarations
Federally Declared Disasters
22
Date Range
1974–2024
Most Recent Declaration
SWAWILLA FIRE
Fire — declared July 24, 2024 (DR-5518)
Incident period: July 17, 2024 – July 21, 2024
Top Incident Types
- Fire10 (45%)
- Severe Storm5 (23%)
- Biological2 (9%)
- Flood2 (9%)
- Coastal Storm1 (5%)
- Other2 (9%)
Individual Assistance
4
Direct help to disaster survivors
Households Program
1
Housing & temporary lodging support
Public Assistance
22
Repair of public facilities & roads
Hazard Mitigation
13
Funding to reduce future disaster risk
FEMA declares disasters at the county level; counts here include every federally declared disaster touching any county that overlaps this ZIP. Statewide declarations and pre-1964 records without county granularity are excluded. Program flags reflect which FEMA assistance categories were activated (Individual Assistance, Households, Public Assistance, Hazard Mitigation). Source: fema.gov/openfema. Public domain.
Climate
30-year averages (1991-2020) from the nearest GHCN-D weather station. Temperature and precipitation values reflect typical annual conditions, not any single year.
Avg. temperature
43.8°F
30.4° – 57.2°
Annual precipitation
18.1"
Annual snowfall
52.5"
Heating · cooling days
7,865.6 · 167.1
Annual base 65°F
Nearest station: REPUBLIC, WA US, 37.2 miles from the centroid of Keller, WA (ZIP 99140)
Source: NOAA National Centers for Environmental Information, 1991–2020 U.S. Climate Normals (ncei.noaa.gov). Public domain.
Community health profile
Years of potential life lost (per 100K)
13,026
That is roughly 4,826 years per 100,000 above the national county median (~8,200).
Premature death is the headline composite outcome CHR reports — age-adjusted, all-cause, before age 75.
Fair or poor health
21%
of adults self-report
Poor physical health days
5.3
avg per adult per month
Poor mental health days
6.0
avg per adult per month
Uninsured
8.9%
of residents under 65
Primary care MDs
110
per 100,000 residents
Preventable hospital stays
1,477
per 100K Medicare enrollees
Food environment (0-10)
4.9
10 = best access & security
Exercise access
75%
residents near a facility
Flu vaccinated
11%
of Medicare enrollees
Low birth weight (under 2,500 g) accounts for 6.3% of live births in this county — an early-life health input that downstream outcomes track against.
Based on Ferry data (2025 CHR release).
Source: County Health Rankings & Roadmaps, University of Wisconsin Population Health Institute (countyhealthrankings.org). Annual release. Underlying source datasets vary by measure (CDC BRFSS, NCHS Vital Statistics, AHA, USDA Food Environment Atlas, and others). Figures are county-level and assigned to every ZIP whose primary county matches.
Food access
Food access status
Limited food access for many residents
48.6% of Ferry County, WA residents live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket.
Grocery stores
0.64
per 1,000 residents
Supercenters & clubs
—
per 1,000 residents
SNAP-authorized stores
1.65
accepting food benefits
Fast-food restaurants
—
per 1,000 residents
Among low-income residents, 24.5% are low-access — those without a supermarket within 1 mile (urban) or 10 miles (rural).
Per-1,000 figures show how many of each store type exist in Ferry County, WA for every 1,000 residents. Higher grocery and supercenter density usually means easier access to fresh food; higher convenience-store-only density (with low grocery rate) often signals a food swamp.
Source: USDA Economic Research Service, Food Environment Atlas (ers.usda.gov). County-level metrics fanned to ZIP via the primary county in the Census ZCTA-county relationship file. Variable years differ per family (stores ~2020, low-access ~2019).
Who’s moving in and out
Net migration (2022-2023)
▲+42 people
−2 households • −$193K net AGI flow
Moved in
277households
529 people • $16.0M AGI
Moved out
279households
487 people • $16.2M AGI
Where new residents came from
- Spokane County, WA — 35 households
- Stevens County, WA — 27 households
Where departing residents went
- Stevens County, WA — 32 households
- Spokane County, WA — 30 households
- Okanogan County, WA — 23 households
Incoming households reported an average AGI of $57,892 versus departing households' $58,168.
Source: U.S. Internal Revenue Service, Statistics of Income, Migration Data (irs.gov). Public domain. Migration is measured by year-over-year changes in the address on individual tax returns; figures are county-level totals attributed to ZIPs whose primary county matches. Foreign migration contributes to inflow/outflow totals but does not appear in the top-county lists. Small flows are suppressed by IRS to protect taxpayer confidentiality.
Taxes & benefits in Washington
State-level rules that apply to every resident of ZIP 99140. Numbers reflect the most recent published year per source.
Tax rates
Income tax
None
No state income tax
Sales tax (combined)
9.51%
State 6.50% · avg local 3.01%
Property tax (effective)
0.82%
Median $2,299/year
Tax burden rank
31 of 50
10.60% of personal income
For ZIP 99140: A household at this ZIP's median AGI of $45,913 keeps approximately $2,112 more annually than residents of the typical income-tax state. Applied to this ZIP's typical home value of $139,300, that works out to roughly $1,139/year in property tax.
Paid family leave
Program
Paid Family & Medical Leave
Mandatory (state-run insurance)
Max weeks/year
18
Parental
12wk
Max weekly benefit
$1,647
Replacement: 90% AWW up to 0.5x SAWW + 50% above · job protection
Safety net
SNAP eligibility
200% FPL
Broad-Based Categorical Eligibility (raises gross income limit above federal 130% floor). No asset test.
Sources: Tax Foundation (state tax rates & brackets), Bipartisan Policy Center (paid family leave), USDA FNS (SNAP categorical eligibility).
Other ZIPs near 99140
Nearby ZIPs by distance
99138 (Inchelium, 14.4 mi) · 99116 (Coulee Dam, 14.9 mi) · 99124 (Elmer City, 16.1 mi) · 99147 (19.4 mi) · 99155 (Nespelem Community, 21.6 mi) · 99129 (23.7 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
Data sources used on this page
SourcesFresh.CDC PLACES · Apr 24, 2026Fresh.NCES CCD via Urban Institute EDP · Apr 27, 2026Fresh.HUD SAFMR · May 1, 2026
All data on this page is sourced from federal government datasets · Not AI-generated · Methodology
Health profile
Crude prevalence estimates from CDC PLACES, derived from BRFSS small-area modeling. Population-level figures only.
Obesity
42.3%
9.3pp above the 33.0% national rate.
High Blood Pressure
38.2%
6.2pp above the 32.0% national rate.
Depression
24.7%
2.7pp above the 22.0% national rate.
Annual Checkup
70.9%
5.1pp below the 76.0% national rate.
Health Insurance
9.6%
3.4pp below the 13.0% national rate.
Diabetes
16.0%
5.0pp above the 11.0% national rate.
Schools in this ZIP
1 school serves this ZIP, including 1 non-charter.
| School | Type | Grades | Enrollment |
|---|---|---|---|
| Keller Elementary School | Public | 0–6 | 36 |
Schools listed from NCES Common Core of Data via the Urban Institute Education Data Portal.
Fresh.NCES CCD via Urban Institute EDP · Apr 27, 2026Colleges & universities nearby
Colleges in this area
2
Median in-state tuition
$12,535
Median earnings (10 yr)
$68,905
- 4-Year
Washington State University
Pullman, WA · 99164
- In-state tuition
- $13,391
- Out-of-state tuition
- $29,950
- Acceptance rate
- 86.6%
- Graduation rate
- 61.0%
- Median earnings (10 yr)
- $68,905
- Median student debt
- $19,500
- 4-Year
Washington State University - Global Campus
Pullman, WA · 99164
- In-state tuition
- $11,678
- Out-of-state tuition
- $13,021
- Acceptance rate
- —
- Graduation rate
- —
- Median earnings (10 yr)
- $68,905
- Median student debt
- $19,500
Source: U.S. Department of Education College Scorecard (collegescorecard.ed.gov). Public domain data. Earnings figures reflect median earnings 10 years after entry for federally-aided students.
What these numbers say together
Keller, WA (ZIP 99140) sits in Ferry County. The page draws on 2 federal data feeds retrieved Apr 27. Top health signal: Obesity comes in above the national average at 42.3%. NCES lists 1 schools serving the area, 1 non-charter. 2 colleges and universities serve the area, with median in-state tuition of $12,535. 27% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. BLS LAUS records a 7.7% county unemployment rate (2024) — about 3.7 points above the US average and a labor-market distress signal. CDC's Social Vulnerability Index places this ZIP in the 84th percentile nationally — a highly vulnerable community profile. FEMA has issued 22 federal disaster declarations affecting this ZIP since 1974 — a high-frequency exposure profile. Annual average temperature is just 43.8°F per NOAA's 1991–2020 Climate Normals — a notably cold-weather climate. County Health Rankings reports 13,026 years of potential life lost per 100,000 (2025) — well above the national county median. Per USDA's Food Environment Atlas, 48.6% of residents in this county live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket — a deep food-access gap. Washington has no state income tax, saving the local median household (AGI $45,913) approximately $2,112/year vs the US average effective state tax rate. New residents arriving here predominantly come from Spokane County, WA (IRS SOI Migration, 2022-2023). Healthcare access is the area's quieter strength; school options sit on the lighter side, so families may find themselves looking at districts a few ZIPs over. Notable: median household income $50,430, fair market rent of $1,140 for a two-bedroom, and a median home value of $139,300. Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
The two domains pull in different directions. Healthcare access reads strong, but the on-paper school count is on the lighter side — that’s less a quality signal and more a density one. Households here often look at districts a few ZIPs over for school choice while keeping their providers local.
One concrete reading worth keeping: Depression prevalence sits higher the national rate at 24.7%. Each figure on this page links to the original federal dataset with its retrieval date — this synthesis is a reading, not a substitute for the underlying records.
Frequently Asked Questions — ZIP 99140
What is the obesity rate in ZIP 99140?
42.3%, which is 9.3 percentage points above the national average of 33.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the depression rate in ZIP 99140?
24.7%, which is 2.7 percentage points above the national average of 22.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the high blood pressure rate in ZIP 99140?
38.2%, which is 6.2 percentage points above the national average of 32.0% (CDC PLACES, retrieved Apr 24, 2026).
How many schools are in ZIP 99140?
1 school serves this ZIP, including 1 public school (NCES CCD, retrieved Apr 27, 2026). No charter schools are listed in this ZIP by NCES CCD.
Does ZIP 99140 have charter schools?
No charter schools are listed in ZIP 99140 by NCES CCD (retrieved Apr 27, 2026).
Are there high schools in ZIP 99140?
No high schools are listed in this ZIP by NCES CCD (retrieved Apr 27, 2026).
What is the population of ZIP 99140?
568 people live in ZIP 99140, with a median age of 51.3 (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the median household income in ZIP 99140?
$50,430 per year (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
Is ZIP 99140 mostly renters or homeowners?
In ZIP 99140, 72.5% of occupied housing units are owner-occupied and 27.5% are renter-occupied (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How do people commute in ZIP 99140?
In ZIP 99140, 5.4% of workers work from home. Public transit is used by 0.0% of commuters (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the poverty rate in ZIP 99140?
19.0% of the population in ZIP 99140 lives below the federal poverty line (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What percentage of households in ZIP 99140 have broadband internet?
67.8% of households in ZIP 99140 have broadband internet access (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the average household income in ZIP 99140?
The average Adjusted Gross Income reported on tax returns from ZIP 99140 (Keller, WA) is $45,913 per return (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How much do homeowners pay in property tax in ZIP 99140?
Tax returns from ZIP 99140 report an average of $0 per return in real-estate tax deductions (IRS SOI Tax Year 2022, retrieved May 2, 2026).
What percentage of residents in ZIP 99140 earn over $200,000?
0.0% of tax returns from ZIP 99140 (Keller, WA) report Adjusted Gross Income of $200,000 or more (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How many businesses are in ZIP 99140?
As of 2022, 7 business establishments operated in ZIP 99140 employing 25 workers (Census ZIP Business Patterns, retrieved May 3, 2026).
What is the average salary in ZIP 99140?
The average annual pay across all local establishments in ZIP 99140 is $74,400, based on Census ZIP Business Patterns 2022 data (retrieved May 3, 2026).
How vulnerable is ZIP 99140 to disasters and public health emergencies?
According to the CDC Social Vulnerability Index (2022), ZIP 99140 ranks in the 84th percentile nationally for social vulnerability — a very high vulnerability profile (retrieved May 3, 2026).
What is the biggest vulnerability factor in ZIP 99140?
Household Characteristics is the highest-scoring CDC SVI theme for ZIP 99140, ranking in the 91th percentile nationally (CDC/ATSDR Social Vulnerability Index 2022, retrieved May 3, 2026).
How many federally declared disasters has ZIP 99140 experienced?
FEMA has recorded 22 federal disaster declarations affecting ZIP 99140 between 1974–2024 (FEMA OpenFEMA Disaster Declarations, retrieved May 3, 2026).
What kinds of disasters most often hit ZIP 99140?
Fire is the most common federally declared disaster type affecting ZIP 99140, accounting for 10 of 22 declarations (45%, FEMA OpenFEMA, retrieved May 3, 2026).
What was the most recent disaster declared for ZIP 99140?
The most recent FEMA disaster declaration affecting ZIP 99140 was "SWAWILLA FIRE" — a fire declared in 2024 (DR-5518) (FEMA OpenFEMA, retrieved May 3, 2026).
What colleges are near ZIP 99140?
2 colleges and universities are listed near ZIP 99140 by the U.S. Department of Education College Scorecard, including Washington State University and Washington State University - Global Campus (retrieved May 2, 2026).
What is the average tuition at colleges near ZIP 99140?
Median in-state tuition across 2 nearby institutions is $12,535 (College Scorecard, retrieved May 2, 2026).
What do graduates earn from colleges near ZIP 99140?
Graduates of nearby colleges earn a median of $68,905 ten years after entry (College Scorecard, retrieved May 2, 2026).
What is the climate like in ZIP 99140?
ZIP 99140 has an average annual temperature of 43.8°F and 18.1" of annual precipitation based on the REPUBLIC, WA US weather station 37.2 miles from the ZIP centroid (NOAA 1991–2020 Climate Normals, retrieved May 8, 2026).
What taxes apply in ZIP 99140?
Washington has no state income tax. For a household earning the local median AGI of $45,913, this saves approximately $2,112 per year compared to the national average effective state tax rate. The combined state and local sales tax rate is 9.51% (Tax Foundation 2025).
Does Washington have paid family leave?
Washington runs an active paid family leave program (Paid Family & Medical Leave) offering up to 18 weeks of paid leave per year, with a maximum weekly benefit of $1,647 (Bipartisan Policy Center 2026).
What data is available for ZIP 99140?
This page covers health outcomes from CDC PLACES (33 metrics), school information from NCES CCD (1 school), demographics from the Census ACS 5-Year (2022), colleges from the U.S. Department of Education College Scorecard (2 institutions), income & tax statistics from the IRS SOI (Tax Year 2022), local business & employment from Census ZIP Business Patterns (2022), social vulnerability scores from the CDC/ATSDR SVI (2022), federal disaster declarations from FEMA OpenFEMA (22 on record), climate normals from NOAA NCEI (1991-2020), and state-level tax rates from the Tax Foundation. Data is refreshed on Mubboo's standard schedule.
How current is this data?
Health data retrieved Apr 24, 2026 from CDC PLACES. School data retrieved Apr 27, 2026 from NCES CCD. Demographics retrieved Apr 30, 2026 from Census ACS 5-Year (2022). College data retrieved May 2, 2026 from U.S. Dept of Education College Scorecard. Income & tax statistics retrieved May 2, 2026 from IRS SOI (Tax Year 2022). Business & employment retrieved May 3, 2026 from Census ZBP (2022). Social vulnerability scores retrieved May 3, 2026 from CDC/ATSDR SVI (2022). Federal disaster declarations retrieved May 3, 2026 from FEMA OpenFEMA (22 on record). Climate normals retrieved May 8, 2026 from NOAA NCEI (1991-2020). State-level tax rates retrieved 2026-05-05 15:58:22.284+00 from the Tax Foundation.
Other ZIPs near 99140
Nearby ZIPs by distance
99138 (Inchelium, 14.4 mi) · 99116 (Coulee Dam, 14.9 mi) · 99124 (Elmer City, 16.1 mi) · 99147 (19.4 mi) · 99155 (Nespelem Community, 21.6 mi) · 99129 (23.7 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
More Info topics
Have a specific question about ZIP 99140?
Ask Mubboo — launching Q4 2026.
Data refreshed via Mubboo's ETL pipeline; oldest source on this page retrieved Apr 24, 2026.
Social Vulnerability Index
Overall SVI
84th percentile
Very High Vulnerability
Based on 1 census tract, population 697
Vulnerability Themes
Households Without Vehicle
29
Limited English Speakers
5
Persons with Disability
159
Without HS Diploma
47
Without Health Insurance
65
Adults Age 65+
175
The Social Vulnerability Index uses U.S. Census data to identify communities most at risk during public health emergencies and natural disasters. Higher percentiles indicate greater vulnerability. Tract-level scores are aggregated to this ZCTA via Census 2020 ZCTA→Tract crosswalk, weighted by land-area share. Source: atsdr.cdc.gov. Public domain.