Question: What is the 2010 population of the town in Clark County, Nevada which was part of those that Las Vegas Valley Water District provides water?

Context paragraphs:
Las Vegas: Las Vegas ( , Spanish for "The Meadows"), officially the City of Las Vegas and often known simply as Vegas, is the 28th-most populated city in the United States, the most populated city in the state of Nevada, and the county seat of Clark County.  The city anchors the Las Vegas Valley metropolitan area and is the largest city within the greater Mojave Desert.  Las Vegas is an internationally renowned major resort city, known primarily for its gambling, shopping, fine dining, entertainment, and nightlife.  The Las Vegas Valley as a whole serves as the leading financial, commercial, and cultural center for Nevada.

Big Bend Water District: Big Bend Water District is a government agency that was created in 1983 to service the community of Laughlin, Nevada.  It is governed by the Clark County Commission and operated by the Las Vegas Valley Water District.  It is a member agency of the Southern Nevada Water Authority.

Santa Clara Valley Water District: The Santa Clara Valley Water District provides stream stewardship, wholesale water supply and flood protection for Santa Clara County, California, in the southern San Francisco Bay Area.  The district encompasses all of the county’s 1300 sqmi and serves the area’s 15 cities, 1.8 million residents and more than 200,000 commuters.  The district's three water treatment plants can produce as much as 210000000 USgal of drinking water a day.  Another part of the district's mission is to manage flood and storm waters along the county’s hundreds of miles of creeks and rivers in an environmentally sensitive manner.

Clark County Water Reclamation District: The Clark County Water Reclamation District (District) is a government wastewater treatment agency in Clark County, Nevada.  As a member of the Southern Nevada Water Authority, its mission is to treat millions of gallons of wastewater that is produced every day.  The District is the largest water treatment agency in Southern Nevada and is responsible for treating wastewater from unincorporated parts of Clark County within the Las Vegas Valley, including most of the Las Vegas Strip, and the communities of Blue Diamond, Moapa Valley, Nevada, Indaian Springs, Nevada, Laughlin, Nevada, and Searchlight.

Quantification Settlement Agreement: The Quantification Settlement Agreement of 2003 is an agreement between the Imperial Irrigation District, the San Diego County Water Authority, and several other federal, local, and state water agencies.  Under the terms of the agreement, the Imperial Irrigation District (IID) agreed to transfer large quantities of irrigation water to the San Diego County Water Authority while providing a pathway for the state of California to restore the Salton Sea.  According to the IID, "The Quantification Settlement Agreement and Related Agreements are a set of inter-related contracts that settle certain disputes among the United States, the State of California, IID, Metropolitan Water District, Coachella Valley Water District and the San Diego County Water Authority."

Las Vegas–Paradise, NV MSA: The Las Vegas–Paradise, NV MSA, also known as the Las Vegas–Henderson–Paradise, NV Metropolitan Statistical Area (2013), is in the southern part of the U.S. state of Nevada, coextensive since 2003 with Clark County, Nevada.  A central part of the metropolitan area is the Las Vegas Valley, a 600 sqmi basin that includes the metropolitan area's largest city, Las Vegas as well as the other primary city, Paradise, Nevada.  The area contains the largest concentration of people in the state.  Cities in the metropolitan area include Las Vegas, Henderson, North Las Vegas, and Boulder City.  The metropolitan area is one of the top tourist destinations in the world, drawing over 40 million international and domestic visitors in 2013 with a GMP of US$103.3 billion.

Searchlight, Nevada: Searchlight is an unincorporated town and census-designated place (CDP) in Clark County, Nevada, United States, at the topographic saddle between two mountain ranges.  As of the 2010 census it had a population of 539.

Springs Preserve: Las Vegas Springs Preserve consists of 180 acre dedicated to nature walks and displays and is owned and operated by the Las Vegas Valley Water District.  The Preserve is located approximately three miles west of downtown Las Vegas, Nevada.  The Preserve is built around the original water source for Las Vegas, the Las Vegas Springs.

Las Vegas Valley: The Las Vegas Valley is a major metropolitan area located in the southern part of the U.S. state of Nevada.  The largest urban agglomeration in the state, it is the heart of the Las Vegas–Paradise-Henderson, NV MSA.  The Valley is largely defined by the Las Vegas Valley landform, a 600 sqmi basin area surrounded by mountains to the north, south, east and west of the metropolitan area.  The Valley is home to the three largest incorporated cities in Nevada: Las Vegas, Henderson and North Las Vegas.  Five unincorporated towns governed by the Clark County government are part of the Las Vegas Township and constitute the largest community in the state of Nevada.

Las Vegas Valley Water District: The Las Vegas Valley Water District (LVVWD) is a not-for-profit government water supply agency that has been providing water to the Las Vegas Valley since 1954.  The district helped build the area's water delivery system and now provides water to more than one million people in Southern Nevada.  Today the District provides water to the City of Las Vegas, the unincorporated areas of Clark County including Paradise and Winchester, where the major Las Vegas Strip casinos are located, Kyle Canyon, Blue Diamond, Searchlight, and Jean.

Supporting paragraphs: Las Vegas Valley Water District Searchlight, Nevada
Answer: 539