Question: What county is WLTN's transmitter located in?
Context: KJJF (88.9 FM) is a National Public Radio member station in Harlingen, Texas, United States.  KJJF, with its transmitter located in Lozano, signed on the air in April 1991 as KMBH-FM and began airing NPR programming in June of the same year.  KMBH-FM's signal was limited mainly to Cameron County, Texas until July 1992, when satellite station KHID 88.1 FM McAllen began broadcasting with its transmitter located in Alton, covering the Hidalgo County area. WRDT, known on the air as "The Word AM 560, Detroit's Christian Talk", is a radio station licensed to Monroe, Michigan, serving the Detroit metropolitan area.  The station broadcasts in HD Radio with 500 Watts daytime power from a transmitter located in South Monroe, Michigan, and 14 Watts nighttime power (Non-HD) from a transmitter located in Royal Oak Township, Michigan.  The Royal Oak Township location shares the Greater Media tower with WCSX, WRIF & WMGC.  Its low frequency and strongly directional daytime signal give the station good coverage of the Detroit market, despite the lower power. WLTN is an American radio station licensed by the Federal Communications Commission (FCC) to serve the community of Littleton, New Hampshire, where the transmitter is also located. KIH54 (sometimes referred to as Birmingham All Hazards) is a NOAA Weather Radio station that serves the Birmingham-Hoover-Cullman Combined Statistical Area and surrounding cities.  It is programmed from the National Weather Service forecast office in Calera, Alabama with its transmitter located in the same city, side-mounted on the transmitter tower of Birmingham local television station WTTO.  It broadcasts weather and hazard information for the following counties: Bibb, Blount, Chilton, Coosa, Jefferson, Shelby, St. Clair, Tuscaloosa, and Walker.  On April 23, 2014, it was reported that the transmitter had stopped operating, a cause for concern because central Alabama is predicted to be impacted by severe thunderstorms between approximately April 27 and April 30, and no NOAA Weather Radios in the broadcast area of KIH54 will sound for watches and warnings issued by the National Weather Service until the transmitter is repaired.  On April 24, it was announced that a temporary, but much weaker, transmitter had been activated on the site of the main, inoperative transmitter.  It is currently operating on the broadcast signal of KIH54, using the same call sign.  The main transmitter has since been repaired and is fully operational. WHKR (102.7 FM, "Nash FM 102.7") is a country music radio station serving the Space Coast, but the signal is strong enough to serve parts of the Orlando metropolitan area.  It is owned by Cumulus Media.  It is one of the 3 country stations that serve the Space Coast, the other two being WIXC AM 1060, whose transmitter is located in Mims, Florida, and WWKA (Transmitter located outside the Space Coast).  WHKR's transmitter is located near Cocoa, at . KTVF is an NBC-affiliated television station located in Fairbanks, Alaska, United States.  KTVF is owned by Gray Television, as the sister stations of Fox affiliate KFXF-LD and CBS affiliate KXDF-CD.  The station broadcasts a high definition digital signal on UHF channel 26 (or virtual channel 11 via PSIP) from a transmitter located on the Ester Dome.  KTVF maintains separate studios located on International Drive in downtown Fairbanks.  KTVF operates a digital fill-in translator on VHF channel 11 from a transmitter located at KFXF and KXDF-CD's studios on Braddock Street in downtown Fairbanks.  This station is also used to provide full-market over-the-air high definition coverage of the low-powered Fox-affiliated KFXF-LD (simulcast over KTVF-DT2), as well as the low-powered CBS-affiliated KXDF-CD (simulcast over KTVF-DT3). The Skavlen Transmitter is a television and radio guyed mast transmitter located in Mosvik, Norway at 63°46'19"N 10°57'4"E.  The transmitter is 165 metres tall.  Among the channels broadcast from the station include NRK1, NRK2, TV 2 (television), NRK P1, NRK P2, NRK P3, Radio Norge and P4 Radio Hele Norge (radio).  The transmitter was constructed in 1973. KHBS-DT2 and KHOG-DT2 are the CW-affiliated television stations for Northwest Arkansas.  The stations are second digital subchannels of the ABC-affiliates KHBS / KHOG-TV, which are both owned by Hearst Television.  Over the air, KHBS-DT2 broadcasts a high-definition digital signal on UHF channel 21.2 from KHBS's transmitter located northwest of Poteau, Oklahoma.  The station is also offered on Cox cable channel 22 in Fort Smith.  KHOG-DT2 broadcasts an HD digital signal on UHF channel 15.2 from KHOG's transmitter located southeast of Fayetteville.  It can be seen on Cox cable channel 4 in that city as well.  KHBS-DT2 and KHOG-DT2 are known on-air together as the Arkansas CW.  Their parent stations have studios on Ajax Avenue in Rogers. WKOI-TV, virtual channel 43 (UHF digital channel 39), is an American television station owned and operated by the Trinity Broadcasting Network and is one of the network's original affiliates.  It is licensed to Richmond, Indiana with a transmitter located on SR 73 in Milford Township, Butler County, Ohio, near Collinsville.  The transmitter is located approximately halfway between Richmond and Cincinnati, providing coverage to Northern Kentucky, Southwestern Ohio, and Eastern Indiana, hence its callsign WKOI.  Even though its transmitter is located within the Cincinnati television market, the station is officially assigned by Nielsen to the Dayton market. Littleton is a town in Grafton County, New Hampshire, United States.  The population was 5,928 at the 2010 census.  Situated at the northern edge of the White Mountains, Littleton is bounded on the northwest by the Connecticut River.
Answer: Grafton County