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Green Valley, Arizona
Tile rooftop in Green Valley
Tile rooftop in Green Valley
Location in Pima County and Arizona
Location in Pima County and Arizona
Green Valley, Arizona is located in the United States
Green Valley, Arizona
Green Valley, Arizona
Location in the United States
Country United States
State Arizona
County Pima
Area
 • Total 19.75 sq mi (51.14 km2)
 • Land 19.73 sq mi (51.10 km2)
 • Water 0.01 sq mi (0.04 km2)
Elevation
2,980 ft (908 m)
Population
 (2020)
 • Total 22,616
 • Density 1,146.27/sq mi (442.59/km2)
Time zone UTC−7 (Mountain (MST))
ZIP codes
85614, 85622
Area code(s) 520
FIPS code 04-29710
GNIS feature ID 37327
Ocotillos and church
Ocotillos at Valley Presbyterian Church, Green Valley, Arizona
Caution golf carts
Golf carts are popular in Green Valley
Saddled Horse (NOT real)
Yard art in Green Valley neighborhood

Green Valley is an unincorporated community and census-designated place (CDP) in Pima County, Arizona, United States. The population was 22,616 at the 2020 census [1]

Geography

Green Valley is located along the western side of the Santa Cruz River at 31°51′N 111°0′W / 31.850°N 111.000°W / 31.850; -111.000 (31.8556, -111.0001). Continental is to the east of Green Valley, on the other side of the river.

According to the United States Census Bureau, the CDP has a total area of 26.3 square miles (68.0 km²), of which, 26.2 square miles (68.0 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.08%) is water.

Green Valley is twenty miles (32 km) south of Tucson and 40 miles (64 km) north of Nogales, Sonora, Mexico. Surrounded by copper mines, and near the cycling, hiking and birding areas of the Santa Rita Mountains, Green Valley is an unincorporated retirement community composed of 59 Homeowner Associations.

The largest of the mines are the Sierrita Mine owned by Freeport-McMoRan and the Mission Mine of ASARCO. Compared to other mines in Arizona the two mines are large; Sierrita is low-grade.

Climate

Green Valley has a borderline hot semi-arid/hot desert climate (Köppen BSh/BWh) with three seasons: a warm to mild winter with chilly nights from October to March, a hot, extremely dry summer season from April to June, and a hot, relatively humid monsoon season from July to September. Outside monsoon season, rainfall is uniformly scarce, having exceeded 4.0 inches or 100 millimetres only in October 2000 amongst other months. The wettest month on record has been July 1990 with 10.43 inches or 264.9 millimetres, of which 3.22 inches or 81.8 millimetres fell on July 15. The wettest calendar year has been 1993 with 22.00 inches or 558.8 millimetres while the driest since 1988 has been 1997 with 9.90 inches or 251.5 millimetres.

Temperatures are uniformly hot during the summer and monsoon seasons, with 90 °F or 32.2 °C exceeded on 154 days during an average year, and 77 nights failing to fall below 70 °F or 21.1 °C, including every night during August 2011. Frosts are relatively rare, occurring only on 37 nights per winter, and only nine days failing to top 50 °F or 10 °C.

Climate data for Green Valley, Arizona (1988-2016)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 88
(31.1)
90
(32.2)
95
(35)
100
(37.8)
108
(42.2)
111
(43.9)
110
(43.3)
108
(42.2)
106
(41.1)
102
(38.9)
93
(33.9)
85
(29.4)
111
(43.9)
Average high °F (°C) 67.5
(19.72)
69.8
(21)
76.1
(24.5)
82.3
(27.94)
91.6
(33.11)
100.1
(37.83)
98.6
(37)
97.0
(36.11)
94.4
(34.67)
86.1
(30.06)
75.9
(24.39)
66.2
(19)
83.5
(28.61)
Average low °F (°C) 36.9
(2.72)
39.6
(4.22)
45.5
(7.5)
51.4
(10.78)
59.5
(15.28)
69.1
(20.61)
73.6
(23.11)
71.9
(22.17)
67.1
(19.5)
55.3
(12.94)
44.2
(6.78)
36.3
(2.39)
54.1
(12.28)
Record low °F (°C) 17
(-8.3)
16
(-8.9)
29
(-1.7)
31
(-0.6)
44
(6.7)
52
(11.1)
60
(15.6)
60
(15.6)
50
(10)
33
(0.6)
22
(-5.6)
21
(-6.1)
16
(-8.9)
Rainfall inches (mm) 0.78
(19.8)
0.81
(20.6)
0.67
(17)
0.27
(6.9)
0.19
(4.8)
0.35
(8.9)
3.41
(86.6)
2.79
(70.9)
1.52
(38.6)
1.06
(26.9)
0.60
(15.2)
0.94
(23.9)
13.39
(340.1)
Avg. rainy days (≥ 0.01 inch) 4 4 4 2 1 2 11 10 5 4 2 4 53
Source: Tucson National Weather Service

Demographics

Historical population
Census Pop.
U.S. Decennial Census

2010 census

As of the census of 2010, there were 21,391 people residing in Green Valley. The population density was 663.4 people per square mile. There were 17,322 housing units. The racial makeup of the CDP was 93.4% non-Hispanic White, 0.4% Black or African American, 0.3% Native American, 0.7% Asian, 0.4% from other races, and 0.7% from two or more races. 4.9% of the population were Hispanic or Latino of any race.

The median income for a household in Green Valley was $46,732 in 2014 dollars. The per capita income for the CDP was $35,416. 4.6% of the population was below the poverty line.

Water sustainability

In the desert southwest, water sustainability is a major concern. According to a 2007 report by Pima County, 76,000 acre feet (94,000,000 m3) of water was pumped from the aquifer in the Upper Santa Cruz Valley in 2006, with 85 percent of that water being used for mining and agriculture. The remaining 15 percent was split between water used for golf courses and residential/commercial water use. The report explains that "The Green Valley area does not have a sustainable water supply given current groundwater pumping rates... the water table in Green Valley has been declining in past years, and is expected to decline even faster as water demands [continue to increase]...". The report concludes that "Water supplies will become critical within the next ten years."

The Upper Santa Cruz Valley has several major water users, all pumping water out of the same aquifer. Most area water users are for-profit companies. ASARCO-Mission Mine, Freeport-McMoRan Sierrita Mine and Farmers Investment Co. (farming) are industrial scale water users. Residential water is provided by Farmers Water Company, Sahuarita Water Company, Las Quintas Serenas Water Company, Quail Creek Water Company, Community Water Company of Green Valley (a nonprofit member owned cooperative), and the Green Valley Water District (a governmental water utility). The proliferation of water companies can be partially explained by the fact that Arizona water law places few limits on the amount of water that can be pumped with costs limited only to drilling, pumping, distribution, etc. Since 2007 the Upper Santa Cruz Providers and Users Group (USCPUG) has been working to bring all local water entities, including the Town of Sahuarita, to the same table. Most of the water users and utilities are now members of USCPUG. The organization has published an analysis and projection of area water use through 2030. It has joined with the U S Bureau of Reclamation to lay the groundwork for transportation and use of Colorado River water from the Central Arizona Project canal to greatly reduce reliance on pumping groundwater. If a system is successfully completed, the excess pumping will be largely or fully eliminated. The process through design and construction is expected to take several years with funding being the major challenge.

Miscellaneous

In 2005 Green Valley was the host of the SAE Mini Baja 100 competition. Mini Baja vehicles are custom made by students. In this case there were about 60 teams from various universities, including some from Canada. ETS- École de technologie supérieure of the Université du Québec, from Montreal, Quebec, Canada, won the competition.


Transportation

Green Valley is served by Sun Shuttle service to Tucson.

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