Here is the relevant satellite imagery from Google Earth which shows the construction of the facility (which began in late 2005):
Image Dates: (L) 2005-8-5, (R) 2005-10-5
Image Dates: (L) 2006-11-11, (R) 2009-4-16
Image Dates: (L) 2010-3-28, (R) 2010-10-6
You can see the facility in Google Maps here.
Here is the story according to KCNA:
Pyongyang, November 9 (KCNA) — The Ryongsong Water-purifying Station has been built on a modern basis.
Latticing, detritus chamber, settling basin and others were successfully built to ensure the flow of clean water into the River Pothong and provide the people in the capital city with better living conditions and circumstances.
A ceremony for its completion took place on Wednesday.
Present there were Vice-premier Jon Ha Chol, officials concerned, scientists, builders and workers.
Hwang Hak Won, minister of Urban Management, addressing the ceremony, noted that the station was perfectly completed in a short span of time.
He stressed the need to strictly abide by the requirements of the technical regulations in managing and operating the station, further perfect the processes and make green-belt in its surrounding area.
Additional information:
2. Here is a previous post on waste management in the DPRK.
