The formerly named Merseyside Waste Disposal Authority (MWDA) is a statutory Waste Disposal Authority that manages the municipal solid waste produced in Merseyside, England.
 MWDA was established in 1986 following the abolition of Merseyside County Council, to undertake the waste disposal for local authorities across Merseyside – Liverpool, Knowsley, Sefton, Wirral and St Helens.
 MWDA takes a lead in advocating waste minimisation, recycling and the safe and effective disposal of waste for Merseyside’s residents and operates 14 Household Waste Recycling Centres.
 Veolia Environmental Services is the current contractor for the Authority's major waste services contract.
The Greater Manchester Waste Disposal Authority (GMWDA) is England’s largest Waste Disposal Authority, responsible for the management and disposal of municipal waste from Greater Manchester.
 It deals with 1.1 million tonnes of waste produced each year, from approximately 1 million households and population of over 2.27 million in the metropolitan districts of Bolton, Bury, Manchester, Oldham, Rochdale, Salford, Stockport, Tameside and Trafford — though part of Greater Manchester, the Metropolitan Borough of Wigan administers its own waste disposal operations, however they are represented on the authority for administration purposes.
 The waste comes primarily from household waste collections and 20 Household Waste Recycling Centres (HWRCs) provided and serviced by the GMWDA.
 It handles around 4% of the nation's municipal waste.
InSinkErator is a company and brand name known for producing instant hot water dispensers and waste disposal systems, generally called garbage disposals or garbage disposers.
 The company was founded in Racine, Wisconsin by John W. Hammes, who was working as an architect there.
 Hammes is credited with inventing the "in-sink" food waste disposal in 1927, for his wife.
 It works by grinding and shredding solid food waste.
 He spent ten years improving the design and went into business selling the appliance.
 His company was called the In-Sink-Erator Manufacturing Company.
 The name is a play on the word "incinerator" and refers to the fact that the mouth of the disposal unit is located "in" the "sink".
Waste disposal authorities (WDA) were established in the United Kingdom following the Environmental Protection Act 1990.
 WDAs are in charge of the use of funds from Council Tax to facilitate the disposal of municipal waste.
 WDAs must manage waste which is collected by local councils.
 In the case of unitary authorities waste disposal authorities are the same as the waste collection authority.
 WDAs are responsible for developing and implementing plans to deal with municipal waste.
Johnston is a town in Providence County, Rhode Island, United States.
 The population was 28,769 at the 2010 census.
 Johnston is the site of the Clemence Irons House (1691) a stone-ender museum and the only landfill in Rhode Island.
 Incorporated on March 6, 1759, Johnston was named for the colonial attorney general, Augustus Johnston.
The Junipero Serra Landfill was a solid waste disposal site in Colma, California, United States.
 The site was closed in 1983 and ultimately developed by commercial land uses, collectively known as the Metro Center.
 The original commercial use built on the closed landfill site was a Home Depot Inc.retail store and parking lot constructed over 1,348 piles, each driven approximately 160 ft deep into the landfill (Bay Area Rapid Transit District, 2006).
 The site also required the engineering of a landfill gas control system, since, when organic solid waste aerobically decomposes, it produces methane gas, which is explosive and toxic in large concentrations.
 SCS Engineers was presented an award by the Solid Waste Association of North America for the design of the closure methane capture system at this landfill.
 (SCS Engineers, 2002).
Otter Lake Waste Management Facility is a waste management facility in Otter Lake, Nova Scotia, a community of the Halifax Regional Municipality.
 The facility was built by the Halifax Regional Municipality in the 1990s to replace an outdated solid waste disposal site in Upper Sackville, Nova Scotia.
Alkali Lake Chemical Waste Dump is a hazardous waste disposal site near the southwest edge of Alkali Lake, a seasonally dry playa in Lake County, Oregon.
 It is in the Summer Lake watershed.
 The site has been the focus of Oregon Department of Environmental Quality (DEQ) efforts to remediate a complex mix of toxic chemicals.
 Problems were initially caused by the dumping of hazardous waste near the lakebed between 1969 and 1971.
The Central Landfill is a 154 acre waste disposal site in Johnston, Rhode Island.
 It is the state's only landfill and receives more than 90% of the state's solid waste.
 It has been on the Environmental Protection Agency's Superfund National Priorities List since 1986.
 The site is owned and operated by the Rhode Island Resource Recovery Corporation (RIRRC).
The Hartland landfill is the waste disposal site for the city of Victoria, British Columbia and the Greater Victoria area.
 It was purchased by the Capital Regional District in 1975 and has been directly operated by its Environmental Sustainability Department since 1985.
 It is located in the District of Saanich on top of a hill, between Victoria and Sidney, at the end of Hartland Avenue.
 There is a public waste drop-off area, a recycling centre, a household hazardous waste collection facility and an electricity generating station that utilizes landfill gas as a fuel source.
 It has won several international environmental awards.
 At current disposal rates it is estimated that the landfill will be full by 2045.

Question: Johnston, Rhode Island is the site of what waste disposal site?
Answer: Central Landfill