The 3-Districts Water Supply Scheme (3DWSS) is a conventional surface water supply scheme serving originally three (3), but now six (6) districts across Greater Accra and Volta regions with a spatial distribution of 150km from end to end and a cumulative length of 300km of distribution network and 52 km of transmission mains serving about 160 communities with a population of over One Hundred and Forty Thousand (140,000) people

Raw water from the River Volta is collected under gravity through a 400mm diameter pipe connected to an intake well of depth 30 feet. Six (6) submersible pumps in the intake well pump the raw water into the sedimentation tank. The pre-filtered raw water flowing is then filtered through the slow sand filters. and then chlorinated before moving into underground Clear Water Tanks.

The Clear Water Tanks are connected to a Suction Chamber located at the pumping station with Six (6) high-lift pumps. These high-lift pumps then feed all the eight (8) High-Level Tanks through their corresponding transmission lines. These high-level tanks, located in various communities, feed the distribution lines with treated water to the end users in homes, institutions and public standpipes. The Dawa booster station has an underground tank to distribute water to the remote catchment area.

The system has three hundred and thirty-two (332) stand pipes, 955 private connections, 82 public institutions and 89 commercial entities as at January 2020.
The treatment method employed for purification is physical, biological and chemical method and the source of power is ECG. The system was completed in 2008.
The system has forty-four (44) professional staff working from the headworks to the end user.

The Kweiman-Danfa Water Scheme is a Borehole Piped Water Scheme serving these communities–Kweiman, Danfa, Otinibi and Ayi-mensah. It is located in the La Nkwantanang Municipality. The scheme serves a population of about fourteen thousand (14,000) people.

The system was commissioned in the year 2005. It has one (1) concrete storage tank with a capacity of 80m3, and the distribution line is made up of PVC/HDPE/UPVC materials. Currently, the total number of stand pipes is Twenty-one (21) with One thousand (1,000.00) house hold connections and Two (2) connections to Institutions.
The system is currently under expansion, with additional 3 boreholes being drilled to argument the water supply from the scheme; the transmission lines have been changed to HDPE with an additional 250 cubic metric concrete tank. Work done so far is about 75% complete.

The system has Seven (7) professional staff and Six (6) auxiliary staff members and the source of power is ECG.

The Osudoku Water Scheme is a surface water scheme and is located at Asutuare with a population of Twenty Thousand, Three Hundred and Five (20,305) people. The source of water is the Volta River.

The system takes raw water from the Volta River through a surface pump at the intake to the aerator tank, the water falls under gravity into graters causing soluble iron to be oxidized and precipitated. This settles down as sediments in the sedimentation tank. The water then flows through slow sand filters tank and finally into the clear well water tank which is then chlorinated to disinfect any bacteria. The treated water is then pumped to 3 storage tanks for distribution into homes, factories and stand pipes.

The system was constructed in the year 2006 and has two concrete tanks of 450m3 capacities each and one (1) high level tank of 45m3 capacity made of steel and nineteen (19) stand pipes.

The scheme currently has Four Hundred and Forty-Two (442) house hold connections, sixteen (16) connections to Institutions and sixteen (16) Commercial connections.
The system has Six (6) professional staff and seven (7) auxiliary staff members and the source of power is ECG.

The CWSA-GAR is also facilitating the implementation of projects for international organizations such as UNICEF, Rotary International/USAID and Accra Ridge Rotary club.