Population & age
- Total population
- 387
- Median age
- 55.0
Norphlet, AR (71759)
Union County · Population 387
Fresh.Data current as of Apr 24, 2026
Norphlet, AR (ZIP 71759) sits in Union County. The page draws on 2 federal data feeds retrieved Apr 27. Top health signal: High Blood Pressure comes in above the national average at 43.4%. NCES lists 1 schools serving the area, 1 non-charter. 4 colleges and universities serve the area, with median in-state tuition of $5,040. FDIC counts just 1 bank branch in this ZIP (Summary of Deposits, 2024) — residents likely lean on neighboring ZIPs or online banking for most services. The CDC SVI flags household composition (74th percentile) as this ZIP's standout vulnerability dimension, sitting well above its overall 37th-percentile score. FEMA has issued 20 federal disaster declarations affecting this ZIP since 1968 — a high-frequency exposure profile. Annual precipitation averages 50.5" — a wet-climate ZCTA per NOAA's 1991–2020 Normals. County Health Rankings reports 15,152 years of potential life lost per 100,000 (2025) — well above the national county median. 28.2% of residents in this county are flagged low-access by USDA's 2025 Food Environment Atlas — a notable supermarket-access gap. IRS migration data (2022-2023) shows a net loss of 292 residents (213 households) — the ZIP's primary county is shrinking. 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: fair market rent of $920 for a two-bedroom, a 31.3% poverty rate (well above the ~12% US average), and a median home value of $155,600. 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
- 88.4%
- Black
- 8.3%
- Asian
- 0.0%
- Hispanic / Latino
- 1.6%
- Other / multi-racial
- 3.4%
Income & housing
- Median home value
- $155,600
Education
- Bachelor's degree or higher (age 25+)
- 48.6%
Employment
- Unemployment rate
- 0.0%
Housing
- Owner-occupied
- 160(92.5%)
- Renter-occupied
- 13(7.5%)
- Vacant units
- 58
- Built (median)
- 1979
Commute
- Public transit
- 0(0.0%)
- Work from home
- 0(0.0%)
- Avg commute
- 20.2 min
Economic wellbeing
- Below poverty line
- 121(31.3%)
- Uninsured
- 15(3.9%)
Digital access
- Broadband access
- 157(90.8%)
- No broadband
- 16(9.2%)
Language & nativity
- Foreign-born
- 0(0.0%)
- Non-English at home
- 8(2.1%)
Fair Market Rent
Fresh.HUD SAFMR · May 1, 2026Studio
$710
/month
1 Bed
$720
/month
2 Bed
$920
/month
3 Bed
$1,110
/month
4 Bed
$1,300
/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: $3.2M.
Single-family
20
100% of total units
Multifamily (2+ unit)
0
0% of total units
Single-family value
$3.2M
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.
Business & employment
Business establishments
7
Total employment
22
Annual payroll
$1.2M
Average annual pay
$55,682
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
$61,648
Average weekly wage
$1,186
Total employment
16,449
Total establishments
1,165
That is roughly 6% 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
5.0%
That is 1.0 percentage points above the US national unemployment rate of about 4.0%.
Labor force
15,882
Employed
15,086
Unemployed
796
Based on Union County, AR 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.
Banking access
FDIC-insured bank branches
1
Limited banking access
Only a handful of branches — residents may rely on neighboring ZIPs or online banking for most services.
Total deposits
$2.9M
across all branches in this ZIP
Distinct institutions
1
different banks operating here
Top banks by deposits in this ZIP
- 1.Smackover State Bank$2.9M · 1 branch
Based on FDIC-insured branch offices as of June 30, 2024.
Source: FDIC Summary of Deposits (fdic.gov). Annual June-30 snapshot of every FDIC-insured branch and the deposits booked there. Figures cover all institutions reporting a branch address in this ZIP.
Public libraries
Public-library outlets
1
Single library outlet
One public-library outlet serves this ZIP — typical of suburban and small-town areas. Card holders also have full access to the rest of the system's branches.
Buildings
1
1 branch
Avg hours / week
18.6
across outlets in this ZIP
Avg square feet
1,150
per outlet
Outlets in this ZIP
- 1.Norphlet Public Library
Public libraries provide free WiFi, computer access, children's programming, job-seeking resources, and meeting space — community infrastructure beyond books. FY2023 outlet inventory from the federal Public Libraries Survey.
Source: Institute of Museum and Library Services (imls.gov). Per-ZIP counts of active public-library outlets — central buildings, branches, and bookmobiles — operated by federally reporting library systems.
Federal Disaster Declarations
Federally Declared Disasters
20
Date Range
1968–2026
Most Recent Declaration
SEVERE WINTER STORM
Winter Storm — declared January 24, 2026 (DR-3636)
Incident period: January 23, 2026 – January 27, 2026
Top Incident Types
- Flood6 (30%)
- Severe Storm5 (25%)
- Hurricane2 (10%)
- Biological2 (10%)
- Severe Ice Storm2 (10%)
- Other3 (15%)
Individual Assistance
8
Direct help to disaster survivors
Households Program
2
Housing & temporary lodging support
Public Assistance
20
Repair of public facilities & roads
Hazard Mitigation
4
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
63.2°F
51.4° – 74.9°
Annual precipitation
50.5"
Annual snowfall
0.8"
Heating · cooling days
2,754.1 · 2,124.1
Annual base 65°F
Nearest station: CALION L&D, AR US, 10.2 miles from the centroid of Norphlet, AR (ZIP 71759)
Source: NOAA National Centers for Environmental Information, 1991–2020 U.S. Climate Normals (ncei.noaa.gov). Public domain.
Air quality
Median daily AQI
49
GoodGood 62dModerate 59d
Peak AQI (2024)
93
Moderate
Primary pollutant
PM2.5
121 days as main pollutant
Days measured
121
Based on Union County data (2024).
Source: U.S. Environmental Protection Agency, Air Quality System (epa.gov). Public domain. Only counties with EPA AQS monitoring stations appear here (~30% of US counties); rural ZIPs whose primary county has no monitor will not show this section.
Community health profile
Years of potential life lost (per 100K)
15,152
That is roughly 6,952 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
22%
of adults self-report
Poor physical health days
5.0
avg per adult per month
Poor mental health days
6.3
avg per adult per month
Uninsured
8.8%
of residents under 65
Primary care MDs
63
per 100,000 residents
Preventable hospital stays
2,906
per 100K Medicare enrollees
Food environment (0-10)
6.4
10 = best access & security
Exercise access
50%
residents near a facility
Flu vaccinated
47%
of Medicare enrollees
Low birth weight (under 2,500 g) accounts for 9.7% of live births in this county — an early-life health input that downstream outcomes track against.
Based on Union 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
Significant food access concerns
28.2% of Union County, AR residents live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket.
Grocery stores
0.11
per 1,000 residents
Supercenters & clubs
—
per 1,000 residents
SNAP-authorized stores
0.85
accepting food benefits
Fast-food restaurants
0.81
per 1,000 residents
Among low-income residents, 12.2% 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 Union County, AR 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).
Safety
FBI publishes crime data at the county level. Numbers below cover the primary county that contains this ZIP. Rates are per 100,000 residents in the area covered by reporting agencies.
Violent crime rate
—
per 100K residents · 81 reports
Property crime rate
—
per 100K residents · 189 reports
Homicide
0
Robbery
5
Burglary
46
Vehicle theft
30
County-level data for Union (2024)
Source: U.S. Federal Bureau of Investigation, Uniform Crime Reporting Program (cde.ucr.cjis.gov). Public domain. Coverage varies by reporting agency; areas with partial agency coverage may understate true crime totals.
Who’s moving in and out
Net migration (2022-2023)
▼−292 people
−213 households • −$13.7M net AGI flow
Moved in
828households
1,550 people • $43.3M AGI
Moved out
1,041households
1,842 people • $57.0M AGI
Where new residents came from
- Ouachita County, AR — 68 households
- Pulaski County, AR — 45 households
- Columbia County, AR — 31 households
- Union Parish, LA — 28 households
Where departing residents went
- Pulaski County, AR — 64 households
- Ouachita County, AR — 53 households
- Union Parish, LA — 40 households
- Faulkner County, AR — 27 households
- Columbia County, AR — 23 households
Incoming households reported an average AGI of $52,236 versus departing households' $54,733.
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 Arkansas
State-level rules that apply to every resident of ZIP 71759. Numbers reflect the most recent published year per source.
Tax rates
Income tax
3.90%
flat · 1 brackets
Sales tax (combined)
9.46%
State 6.50% · avg local 2.96%
Property tax (effective)
0.52%
Median $679/year
Tax burden rank
28 of 50
10.30% of personal income
For ZIP 71759: Applied to this ZIP's typical home value of $155,600, that works out to roughly $805/year in property tax.
Paid family leave
Program
Voluntary (private insurance framework)
Voluntary (private insurance framework)
Safety net
SNAP eligibility
130% FPL
Federal 130% FPL gross income limit. Asset limit $3,000.
Sources: Tax Foundation (state tax rates & brackets), Bipartisan Policy Center (paid family leave), USDA FNS (SNAP categorical eligibility).
Other ZIPs near 71759
Nearby ZIPs by distance
71762 (Smackover, 6.6 mi) · 71724 (Calion, 7.3 mi) · 71730 (El Dorado, 8 mi) · 71751 (Louann, 9 mi) · 71758 (Mount Holly, 14.7 mi) · 71744 (Hampton, 16.3 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
37.2%
4.2pp above the 33.0% national rate.
High Blood Pressure
43.4%
11.4pp above the 32.0% national rate.
Depression
26.1%
4.1pp above the 22.0% national rate.
Annual Checkup
78.9%
2.9pp above the 76.0% national rate.
Health Insurance
10.9%
2.1pp below the 13.0% national rate.
Diabetes
14.3%
3.3pp above the 11.0% national rate.
Schools in this ZIP
1 school serves this ZIP, including 1 non-charter.
| School | Type | Grades | Enrollment |
|---|---|---|---|
| NORPHLET MIDDLE SCHOOL | Public | 5–8 | 337 |
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
4
Median in-state tuition
$5,040
Median earnings (10 yr)
$35,449
- 4-Year
Southern Arkansas University Main Campus
Magnolia, AR · 71753
- In-state tuition
- $9,960
- Out-of-state tuition
- $15,690
- Acceptance rate
- 75.3%
- Graduation rate
- 47.7%
- Median earnings (10 yr)
- $42,386
- Median student debt
- $18,750
- 2-Year
South Arkansas College
El Dorado, AR · 71731
- In-state tuition
- $3,324
- Out-of-state tuition
- $5,532
- Acceptance rate
- —
- Graduation rate
- 27.9%
- Median earnings (10 yr)
- $34,521
- Median student debt
- $11,153
- 2-Year
Southern Arkansas University Tech
Camden, AR · 71701
- In-state tuition
- $5,040
- Out-of-state tuition
- $6,480
- Acceptance rate
- —
- Graduation rate
- 61.7%
- Median earnings (10 yr)
- $36,376
- Median student debt
- $6,000
- Certificate
University of Aesthetics & Cosmetology
El Dorado, AR · 71730
- In-state tuition
- —
- Out-of-state tuition
- —
- Acceptance rate
- —
- Graduation rate
- 39.5%
- Median earnings (10 yr)
- $26,754
- Median student debt
- $9,833
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
Norphlet, AR (ZIP 71759) sits in Union County. The page draws on 2 federal data feeds retrieved Apr 27. Top health signal: High Blood Pressure comes in above the national average at 43.4%. NCES lists 1 schools serving the area, 1 non-charter. 4 colleges and universities serve the area, with median in-state tuition of $5,040. FDIC counts just 1 bank branch in this ZIP (Summary of Deposits, 2024) — residents likely lean on neighboring ZIPs or online banking for most services. The CDC SVI flags household composition (74th percentile) as this ZIP's standout vulnerability dimension, sitting well above its overall 37th-percentile score. FEMA has issued 20 federal disaster declarations affecting this ZIP since 1968 — a high-frequency exposure profile. Annual precipitation averages 50.5" — a wet-climate ZCTA per NOAA's 1991–2020 Normals. County Health Rankings reports 15,152 years of potential life lost per 100,000 (2025) — well above the national county median. 28.2% of residents in this county are flagged low-access by USDA's 2025 Food Environment Atlas — a notable supermarket-access gap. IRS migration data (2022-2023) shows a net loss of 292 residents (213 households) — the ZIP's primary county is shrinking. 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: fair market rent of $920 for a two-bedroom, a 31.3% poverty rate (well above the ~12% US average), and a median home value of $155,600. 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 26.1%. 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 71759
What is the obesity rate in ZIP 71759?
37.2%, which is 4.2 percentage points above the national average of 33.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the depression rate in ZIP 71759?
26.1%, which is 4.1 percentage points above the national average of 22.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the high blood pressure rate in ZIP 71759?
43.4%, which is 11.4 percentage points above the national average of 32.0% (CDC PLACES, retrieved Apr 24, 2026).
How many schools are in ZIP 71759?
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 71759 have charter schools?
No charter schools are listed in ZIP 71759 by NCES CCD (retrieved Apr 27, 2026).
Are there high schools in ZIP 71759?
No high schools are listed in this ZIP by NCES CCD (retrieved Apr 27, 2026).
What is the population of ZIP 71759?
387 people live in ZIP 71759, with a median age of 55.0 (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
Is ZIP 71759 mostly renters or homeowners?
In ZIP 71759, 92.5% of occupied housing units are owner-occupied and 7.5% are renter-occupied (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How do people commute in ZIP 71759?
In ZIP 71759, 0.0% 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 71759?
31.3% of the population in ZIP 71759 lives below the federal poverty line (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What percentage of households in ZIP 71759 have broadband internet?
90.8% of households in ZIP 71759 have broadband internet access (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How many businesses are in ZIP 71759?
As of 2022, 7 business establishments operated in ZIP 71759 employing 22 workers (Census ZIP Business Patterns, retrieved May 3, 2026).
What is the average salary in ZIP 71759?
The average annual pay across all local establishments in ZIP 71759 is $55,682, based on Census ZIP Business Patterns 2022 data (retrieved May 3, 2026).
How vulnerable is ZIP 71759 to disasters and public health emergencies?
According to the CDC Social Vulnerability Index (2022), ZIP 71759 ranks in the 37th percentile nationally for social vulnerability — a moderate vulnerability profile (retrieved May 3, 2026).
What is the biggest vulnerability factor in ZIP 71759?
Household Characteristics is the highest-scoring CDC SVI theme for ZIP 71759, ranking in the 74th percentile nationally (CDC/ATSDR Social Vulnerability Index 2022, retrieved May 3, 2026).
How many federally declared disasters has ZIP 71759 experienced?
FEMA has recorded 20 federal disaster declarations affecting ZIP 71759 between 1968–2026 (FEMA OpenFEMA Disaster Declarations, retrieved May 3, 2026).
What kinds of disasters most often hit ZIP 71759?
Flood is the most common federally declared disaster type affecting ZIP 71759, accounting for 6 of 20 declarations (30%, FEMA OpenFEMA, retrieved May 3, 2026).
What was the most recent disaster declared for ZIP 71759?
The most recent FEMA disaster declaration affecting ZIP 71759 was "SEVERE WINTER STORM" — a winter storm declared in 2026 (DR-3636) (FEMA OpenFEMA, retrieved May 3, 2026).
What colleges are near ZIP 71759?
4 colleges and universities are listed near ZIP 71759 by the U.S. Department of Education College Scorecard, including Southern Arkansas University Main Campus, South Arkansas College, and Southern Arkansas University Tech (retrieved May 2, 2026).
What is the average tuition at colleges near ZIP 71759?
Median in-state tuition across 4 nearby institutions is $5,040 (College Scorecard, retrieved May 2, 2026).
What do graduates earn from colleges near ZIP 71759?
Graduates of nearby colleges earn a median of $35,449 ten years after entry (College Scorecard, retrieved May 2, 2026).
What is the climate like in ZIP 71759?
ZIP 71759 has an average annual temperature of 63.2°F and 50.5" of annual precipitation based on the CALION L&D, AR US weather station 10.2 miles from the ZIP centroid (NOAA 1991–2020 Climate Normals, retrieved May 8, 2026).
What taxes apply in ZIP 71759?
Arkansas has a flat income tax with a top rate of 3.90%. Combined sales tax: 9.46% (Tax Foundation 2025).
Does Arkansas have paid family leave?
Arkansas runs an active paid family leave program offering up to — weeks of paid leave per year (Bipartisan Policy Center 2026).
What data is available for ZIP 71759?
This page covers health outcomes from CDC PLACES (40 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 (4 institutions), local business & employment from Census ZIP Business Patterns (2022), social vulnerability scores from the CDC/ATSDR SVI (2022), federal disaster declarations from FEMA OpenFEMA (20 on record), climate normals from NOAA NCEI (1991-2020), county-level crime data from the FBI Crime Data Explorer (2024), 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. 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 (20 on record). Climate normals retrieved May 8, 2026 from NOAA NCEI (1991-2020). County-level crime data retrieved May 4, 2026 from the FBI Crime Data Explorer (2024). State-level tax rates retrieved 2026-05-05 15:58:22.284+00 from the Tax Foundation.
Other ZIPs near 71759
Nearby ZIPs by distance
71762 (Smackover, 6.6 mi) · 71724 (Calion, 7.3 mi) · 71730 (El Dorado, 8 mi) · 71751 (Louann, 9 mi) · 71758 (Mount Holly, 14.7 mi) · 71744 (Hampton, 16.3 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 71759?
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
37th percentile
Moderate Vulnerability
Based on 1 census tract, population 29
Vulnerability Themes
Persons with Disability
4
Without HS Diploma
2
Without Health Insurance
1
Adults Age 65+
6
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.