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Area data

Knightsen, CA — ZIP 94548

Population: 832 (Census ACS)

The median home value in ZIP 94548 (Knightsen, CA) is $959,900. 1 schools serve the area (NCES). FEMA's National Risk Index rates the county's overall natural-hazard risk Very High, with inlandflooding, drought, earthquake the top-rated hazards. Cost of living is 10.7% above the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$959,900

Median home value

Very High

Hazard risk (county)

Home values & appreciation

Median home value
$959,900
House Price Index (state)
417.4 (-0.8% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Affordability

Cost of living index (High)
110.7 (100 = US avg)
Electricity rate (state-level)
32.5¢/kWh
Natural gas rate (state-level)
$22.00/MCF
30-year mortgage rate (national)
6.66%
15-year mortgage rate (national)
6.00%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
1
Elementary schools
1
Middle schools
0
High schools
0
Schools include
Knightsen Elementary

Source: NCES school directory, 2022-23 (school-address-based)

Natural hazards & flood risk

Overall hazard risk (county)
Very High
Top hazards (county)
inlandFlooding, drought, earthquake, heatWave, landslide
Notable hazard ratings (county)
coastalFlooding: Relatively Moderate · drought: Relatively High · earthquake: Relatively High · heatWave: Relatively High · inlandFlooding: Very High · landslide: Relatively High
Wildfire risk to homes (county)
Higher than 92% of US counties
Buildings in wildfire direct-exposure zone
13.9%
Radon potential (county)
Moderate radon potential — EPA Zone 2 of 3
EPA Superfund (NPL) sites within 5 mi
None
Nearest Superfund site
Concord Naval Weapons Station (19 mi)
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Annual precipitation
17.6 in
USDA plant hardiness zone
9b (extreme annual low 25 to 30°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Good
Median AQI (annual)
48
Days with Good air quality
193
Days with Moderate air quality
168
Highest AQI recorded (year)
94

Source: EPA air quality data (nearest monitoring station, annual)

Amenities

National parks within ~60 mi
10
Nearest national park
Port Chicago Naval Magazine National Memorial (21 mi)
National parks include
Port Chicago Naval Magazine National Memorial, Eugene O'Neill National Historic Site, John Muir National Historic Site
Airports within 30 mi
30
Nearest airport
Funny Farm Airport (2 mi)
Nearest major airport
Buchanan Field (CCR) (21 mi)
Hospitals nearby (~15 mi)
56
Hospitals include
ST ROSE HOSPITAL, PROVIDENCE QUEEN OF THE VALLEY MEDICAL CENTER, DEPT OF STATE HOSPITALS - NAPA
Avg hospital rating (CMS)
3.3 / 5
Best hospital rating nearby (CMS)
5.0 / 5
EV charging stations (within 10 mi)
105
Solar radiation rating
Good (5.1 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)

Housing stock

Median year housing built
1,968
Housing built before 1970
51.0%
Housing built 2000 or later
49.0%
Median annual property tax
$8,467
Households with broadband internet
52.9%

Source: Census ACS 5-year estimates (ZIP-level)

Employment & development

Total county employment
322,307
Average weekly wage
$1,600
Top industries (by employment)
Health Care, Accommodation & Food, Construction
Annual residential building permits (county)
1,199

Sources: BLS QCEW (county-level) · Census Building Permits (county-level)

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the median home value in ZIP 94548?
$959,900.
What is the natural-hazard risk in ZIP 94548?
Overall risk: Very High (FEMA NRI, county-level). Top hazards: inlandFlooding, drought, earthquake, heatWave, landslide.
What is the wildfire risk in ZIP 94548?
Risk to homes is higher than 92% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in ZIP 94548?
Moderate radon potential — EPA Zone 2 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near ZIP 94548?
No current or proposed National Priorities List sites within 5 miles (EPA).
How many schools serve ZIP 94548?
1 schools (1 elementary) (NCES, 2022-23).
What is the air quality in ZIP 94548?
Good. Median AQI: 48. (EPA AQI).
What is the cost of living in ZIP 94548?
Regional Price Parity: 110.7 (100 = US average) (High) (BEA RPP, metro/state-level).

Nearby ZIP codes

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Data last updated

Most recent source refresh: Sep 2026. See all data sources →

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