St. Thomas Aquinas Catholic High School (Guam)

Chalan Pago-Ordot (Chamorro: Chålan Pågu-Otdot) is a village in the United States territory of Guam, containing the communities of Chalan Pago and Ordot. It is located in the eastern-central part of the island and is part of the Kattan (Eastern) District. The village's population has increased slightly since the island's 2010 census.

Guam is a U.S. territory in the western Pacific Ocean, at the boundary of the Philippine Sea. It is the southernmost and largest member of the Mariana Islands archipelago, which is itself the northernmost group of islands in Micronesia. The closest political entity is the Commonwealth of the Northern Mariana Islands (CNMI), another U.S. territory. Guam shares maritime boundaries with CNMI to the north and the Federated States of Micronesia to the south. It is located approximately one quarter of the way from the Philippines to Hawaii. Its location and size make it strategically important. It is the only island with both a protected harbor and land for multiple airports between Asia and Hawaii, on an east–west axis, and between Papua New Guinea and Japan, on a north–south axis. The island is a result of the volcanic activity created by subduction of the Pacific Plate under the Philippine Sea Plate at the nearby Mariana Trench, which runs from the east of Guam to the southwest. Volcanic eruptions established the base of the island in the Eocene, roughly 56 to 33.9 million years ago (mya). The north of Guam is a result of this base being covered with layers of coral reef, turning into limestone, and then being thrust by tectonic activity to create a plateau. The rugged south of the island is a result of more recent volcanic activity. Cocos Island off the southern tip of Guam is the largest of the many small islets along the coastline. Politically, Guam is divided into 19 villages. The majority of the population lives on the coralline limestone plateaus of the north, with political and economic activity centered in the central and northern regions. The rugged geography of the south largely limits settlement to rural coastal areas. The western coast is leeward of the trade winds and is the location of Apra Harbor, the capitol Hagåtña, and the tourist center of Tumon. The U.S. Defense Department owns about 29% of the island, under the management of Joint Region Marianas.

The Chaot River is a river in the United States territory of Guam.

Afame, also Afami, is a census-designated place in central Guam. It is located in the village of Sinajana, just south of Hagåtña.

The Sigua River is a river in the United States territory of Guam. It empties into the Pago River.

The Lonfit River is a river in the United States territory of Guam. It empties into the Pago River. Contaminants from the Ordot Dump in Chalan Pago-Ordot, Guam, which was closed in 2011, leached into the river.

Ordot Dump, also known as Ordot Landfill, was a landfill on the western Pacific island of Guam that operated from the 1940s until 2011. Originally operated by the U.S. military, ownership was transferred to the Government of Guam in 1950, though it continued to receive all waste on the island, including from Naval Base Guam and Andersen Air Force Base, through the 1970s. The Environmental Protection Agency (EPA) designated Ordot Dump a Superfund site in 1983. In 2002, the U.S. government sued Guam under the Clean Water Act to force it to clean up Ordot Dump, resulting in Guam entering into a consent decree to close and cover the dump. After Guam failed to do so, the EPA put the landfill into receivership. The receiver closed Ordot Dump in 2011. In 2017, Guam sued the U.S. government for part of the costs of cleaning up the dump, which were estimated to range as high as $160 million. The Federal government argued that the statute of limitations had already run out for Guam to file suit. The Supreme Court of the United States heard the case, Guam v. United States, and decided unanimously in May 2021 to allow Guam's case to continue.

The Spanish Dikes, located northeast of Agana Springs, Hagåtña, Guam, are historic 19th-century water control structures that were listed on the National Register of Historic Places in 1974. There are two sections of dikes in a swampy region outside Hagåtña. Both sections are constructed of mortared limestone, with buttresses for support, and openings at the top that act as sluiceways where water flow could be controlled. One section is about 70 metres (230 ft) long, varying in thickness from 0.3 to 1 metre (0.98 to 3.28 ft), while the other is 22.5 metres (74 ft) long. The construction dates of these dikes is unknown, but similar structures were likely to exist in the area in the 1830s, and in the 1870s the area was being used for cultivation of rice by Filipino penal labor in an effort to solve the island's long-standing issues with insufficient food production.

The Won Pat Outdoor Oven is a 20th-century version of a traditional hotnu, or outside oven, on the island of Guam. It is located on a vacant lot off Mansanita Court in Sinajana. Although built out of modern materials, it follows a traditional form that has been in use on Guam since these ovens were introduced by the Spanish in the 17th century. It is a barrel-shaped structure about 1.6 metres (5.2 ft) long, 1.3 metres (4.3 ft) wide, rising to a height of 0.55 metres (1.8 ft). The base of the structure is built of rough limestone and mortar. The interior of the vault is made out of heat-resistant bricks, while the exterior is finished in concrete. When recorded in 2010, its main opening was damaged. The oven was listed on the National Register of Historic Places in 2010.

Sinajana (Chamorro: Sinahånña) is the smallest of the nineteen villages in the United States territory of Guam by area. It is located in the hills south of Hagåtña (formerly Agana). The village's name may have come from the word "china-jan," cookware used to cook wild yams that once grew in the area.

The Canada Water Wells, near jct. of Canada-Toto Rd.& Canada -Toto Loop Barrigada-Mangilao, GU, are water works that were built in 1937. They have also been known as Kanada, as Chochugu' and as To'tu. The structures were listed on the National Register of Historic Places in 2008; the listing included two contributing structures. A U.S. Geological Survey report in 2003 described the water of Guam, including identifying that there are approximately 180 water wells serving the needs of Guam, drawing on a lens-shaped aquifer.

The area code 671 is the local telephone area code of the United States territory of Guam. It was created with the beginning of permissive dialing on July 1, 1997, replacing Guam's previous International Telecommunication Union country code 671 at the end of permissive dialing on July 1, 1998.