Alta, California

Alta, pronounced all-tuh, is a small unincorporated community and census-designated place (CDP) in Placer County, California, United States, about 30 miles (48 km) northeast of Auburn. The village is located off Interstate 80 and along the historical First Transcontinental Railroad. The ZIP code is 95701 and the area code 530. One of the few buildings other than private residences is the Alta-Dutch Flat Grammar School serving kindergarten through eighth grade students. The high school that serves Alta is Colfax high School. Colfax High School is 11 miles southwest in the incorporated town of Colfax. The population of Alta was 610 at the 2010 census.

This article is about the California place named Alta. For the historical region containing present-day California prior to the Mexican-American War, see Alta California.
Not to be confused with Alto, California.
Alta, California
Census-designated place
Alta, California
Location with the United States
Coordinates: 39°12′24″N 120°48′41″W
Country United States
State California
County Placer
Area
 • Total2.39 sq mi (6.19 km2)
 • Land2.38 sq mi (6.17 km2)
 • Water0.01 sq mi (0.02 km2)  0.28%
Elevation3,743 ft (1,141 m)
Population
 (2010)
 • Total609
 • Estimate 
(2016)[3]
N/A
Time zoneUTC-8 (Pacific (PST))
 • Summer (DST)UTC-7 (PDT)
ZIP Code
95701
Area code530
FIPS code06-01276
GNIS feature ID2628704

A historical California place once named Alta was located in San Diego County[4] near the present-day La Mesa–El Cajon boundary. This historical place was along the San Diego and Arizona Eastern Railway, now the San Diego Trolley Orange Line, at its Murray Drive undercrossing in La Mesa. The community was named after the Spanish word meaning "upper" or "high".[5]

Geography

According to the United States Census Bureau, the CDP covers an area of 2.4 square miles (6.2 km2), 99.72% of it land, and 0.28% of it water.

Climate

Alta has a hot-summer Mediterranean climate (Köppen climate classification Csa) that is characterized by cool, wet winters and hot, dry summers (Köppen climate classification Csa).

Climate data for Alta, California
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 77
(25)		 80
(27)		 85
(29)		 91
(33)		 102
(39)		 111
(44)		 113
(45)		 112
(44)		 106
(41)		 101
(38)		 87
(31)		 75
(24)		 113
(45)
Average high °F (°C) 53
(12)		 60
(16)		 64
(18)		 70
(21)		 80
(27)		 89
(32)		 94
(34)		 92
(33)		 87
(31)		 77
(25)		 62
(17)		 53
(12)		 73
(23)
Daily mean °F (°C) 46
(8)		 51
(11)		 54
(12)		 59
(15)		 67
(19)		 74
(23)		 79
(26)		 77
(25)		 73
(23)		 64
(18)		 53
(12)		 46
(8)		 62
(17)
Average low °F (°C) 38
(3)		 42
(6)		 44
(7)		 47
(8)		 53
(12)		 60
(16)		 63
(17)		 62
(17)		 58
(14)		 51
(11)		 44
(7)		 39
(4)		 50
(10)
Record low °F (°C) 22
(−6)		 21
(−6)		 26
(−3)		 34
(1)		 37
(3)		 46
(8)		 50
(10)		 49
(9)		 42
(6)		 35
(2)		 27
(−3)		 20
(−7)		 20
(−7)
Average precipitation inches (mm) 4.10
(104)		 3.35
(85)		 3.21
(82)		 1.70
(43)		 0.50
(13)		 0.21
(5.3)		 0.07
(1.8)		 0.10
(2.5)		 0.46
(12)		 1.37
(35)		 3.93
(100)		 3.03
(77)		 22.03
(560.6)
Average snowfall inches (cm) 48.1
(122)		 43.5
(110)		 49.8
(126)		 25
(64)		 7.5
(19)		 0.6
(1.5)		 0
(0)		 0
(0)		 0.4
(1.0)		 2.7
(6.9)		 24
(61)		 38.8
(99)		 240.4
(610.4)
Source 1: http://www.myforecast.com/bin/climate.m?city=513589&metric=false
Source 2: Weatherbase[6]

Demographics
Historical population
CensusPop.%±
U.S. Decennial Census[7]

The 2010 United States Census[8] reported that Alta had a population of 610. The population density was 255.2 people per square mile (98.5/km2). The racial makeup of Alta was 592 (97.0%) White, 1 (0.2%) African American, 3 (0.5%) Native American, 5 (0.8%) Asian, 1 (0.2%) Pacific Islander, 2 (0.3%) from other races, and 6 (1.0%) from two or more races. Hispanic or Latino of any race were 23 persons (3.8%).

The Census reported that 594 people (97.4% of the population) lived in households, 16 (2.6%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.

There were 242 households, out of which 70 (28.9%) had children under the age of 18 living in them, 141 (58.3%) were opposite-sex married couples living together, 17 (7.0%) had a female householder with no husband present, 14 (5.8%) had a male householder with no wife present. There were 18 (7.4%) unmarried opposite-sex partnerships, and 1 (0.4%) same-sex married couples or partnerships. 56 households (23.1%) were made up of individuals, and 19 (7.9%) had someone living alone who was 65 years of age or older. The average household size was 2.45. There were 172 families (71.1% of all households); the average family size was 2.89.

The population was spread out, with 127 people (20.8%) under the age of 18, 37 people (6.1%) aged 18 to 24, 122 people (20.0%) aged 25 to 44, 237 people (38.9%) aged 45 to 64, and 87 people (14.3%) who were 65 years of age or older. The median age was 46.9 years. For every 100 females, there were 112.5 males. For every 100 females age 18 and over, there were 105.5 males.

There were 314 housing units at an average density of 131.4 per square mile (50.7/km2), of which 193 (79.8%) were owner-occupied, and 49 (20.2%) were occupied by renters. The homeowner vacancy rate was 1.5%; the rental vacancy rate was 7.5%. 469 people (76.9% of the population) lived in owner-occupied housing units and 125 people (20.5%) lived in rental housing units.

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References
  1. "2016 U.S. Gazetteer Files". United States Census Bureau. Retrieved Jul 19, 2017.
  2. "Alta, Placer County, California". Geographic Names Information System. United States Geological Survey.
  3. "Population and Housing Unit Estimates". Retrieved June 9, 2017.
  4. "Alta (historical), San Diego County, California". Geographic Names Information System. United States Geological Survey. Retrieved December 2, 2007.
  5. William Bright; Erwin Gustav Gudde (30 November 1998). 1500 California place names: their origin and meaning. University of California Press. p. 14. ISBN 978-0-520-21271-8. Retrieved 20 January 2012.
  6. Alta, California Travel Weather Averages (Weatherbase) http://www.weatherbase.com/weather/weather.php3?s=798040&cityname=Alta-California-United-States-of-America
  7. "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.
  8. "2010 Census Interactive Population Search: CA - Alta CDP". U.S. Census Bureau. Archived from the original on July 15, 2014. Retrieved July 12, 2014.
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