The Ancor WCW is situated in Springs and falls within the DD4 drainage district. Built in 1936 and upgraded on several occasions over a period of time, the works is designed to treat 15 megalitres of wastewater per day from the Springs and Kwa Thema areas. Conventional biological filtration is employed as the main treatment process.

A central inlet works, incorporating the process of screening and grit removal, serves the works. The biological filtration processes include primary clarification, biological filtration and humus clarification. The biofilter effluent is treated to chemically remove ortho-phosphate and a portion of the humus tank effluent is pumped to a local industry for re-use. The final effluent is chlorinated before discharging it into a tributary of the Blesbokspruit