The Pot'onggang Organic Compound Fertiliser Factory (), located in Chà Ângpy'à Âng-dong, P'yà Ângch'à Ân-guyà Âk, P'yà Ângyang, North Korea, was opened in 2012 to produce organic fertiliser making use of sediments and fly ash from an adjacent sewage treatment plant and sludge from the Pot'ong River. It is served by rail via the P'yà Ângnam Line of the Korean State Railway.