DHA is one of Karachi’s most expensive addresses and one of its worst supplied with piped water. Residents pay for tankers, sink boreholes and build large underground tanks to cope. Each of those workarounds affects water quality in DHA Karachi in ways that are easy to overlook when the water looks clear.
This guide explains where DHA’s water comes from, what the recent supply record looks like, what each source puts into your tank, and how to manage storage in a DHA or Clifton home.
In brief
- DHA receives its piped water from KWSC through the Cantonment Board Clifton, and receives very little: 4 to 5 MGD according to Dawn in 2025.
- Most homes top up with tankers and boreholes, each of which brings its own contaminants.
- There is no public evidence that DHA’s water is cleaner than the rest of Karachi’s.
- Large underground cisterns, old concrete in the early phases and sea air are the local risk factors.
- A 10 MGD line from Dumlottee was agreed in September 2026, with a 12-month construction period.
How water reaches DHA
DHA and Clifton do not have their own source. Bulk water comes from the Karachi Water and Sewerage Corporation (KWSC), which hands it to the Cantonment Board Clifton (CBC), and CBC distributes it within the cantonment area. The quantity is small. When the Sindh cabinet approved funding for a dedicated pipeline in July 2025, Dawn reported that DHA residents were receiving only 4 to 5 million gallons per day (MGD) and that the shortage had persisted for years.
The whole city is short. Supply is about 650 MGD against demand of more than 1,200 MGD, so there is little spare water to send anywhere. The route is described in our guide to KWSB water supply.
The recent record
| Date | Event | Effect on DHA and Clifton |
|---|---|---|
| July 2025 | Sindh cabinet approves a 36 km, 24-inch line from Dumlottee designed to carry 10 MGD | First dedicated supply line for the area, on paper |
| Late April to May 2026 | Line No. 5 near Dhabeji taken offline for replacement; power breakdown bursts three 72-inch lines | KWSC names DHA and Clifton among the worst-hit areas; crisis runs into a second week |
| 13 September 2026 | KWSC and the Frontier Works Organisation sign the agreement for the Dumlottee line | An additional 10 MGD promised within 12 months |
If the Dumlottee line is completed on schedule it will roughly triple the piped water reaching the area. Until then, and for the gaps afterwards, most households will keep buying water.
Where DHA’s water really comes from
| Source | What it brings | What it does to your tank |
|---|---|---|
| CBC piped supply | Treated water that has travelled the length of the network; arrives intermittently at low pressure | Fine silt and rust in every fill, more after outages and repairs |
| Tanker water | Depends entirely on where the tanker filled. Some loads are from official hydrants, others are not | Sand and silt, sometimes salt, sometimes microbial contamination; quality changes load to load |
| Borehole (boring) water | Groundwater close to the sea is commonly brackish and hard | Heavy mineral scale on walls and fittings; salty taste; corroded metal parts |
| Bottled water for drinking | Solves the glass, not the house | No effect on tank water used for bathing, cooking and washing |
Most DHA homes use a mix of the first three over a year, which is why the same tank can hold soft piped water one week and hard, salty water the next. Mixed sources make scale and sediment build up faster than any single source would.
Is water quality in DHA Karachi better than in the rest of the city?
There is no public evidence that it is. The piped water comes from the same bulk system that has repeatedly failed testing. In the 2017 sampling carried out for a Supreme Court commission, 107 of 118 Karachi samples were unsafe to drink, and later monitoring by the same agency put the unsafe share at 93 percent. Tanker and borehole water are not tested by anyone unless you pay for it yourself.
What DHA does have is better buildings: newer plumbing in the later phases, bigger tanks and more households with filters. Those help at the tap. They do not change what goes into the tank.
DHA-specific risk factors
- Large underground cisterns. RCC cisterns are standard in DHA and Clifton houses. Big tanks mean water sits longer, and a large floor area collects a lot of sludge before anyone notices.
- Old concrete in the early phases. Houses in Phases 1 to 4 are decades old. Their tanks develop cracks and rough surfaces that hold biofilm and can let groundwater seep in.
- Sea air. Salt-laden air corrodes tank lids, hinges and inspection covers faster in Clifton, Gizri and Seaview. A rusted lid is an open tank.
- Surges on supply day. When water does arrive it comes in a rush that stirs up settled sediment.
- Multiple tanks. A bungalow may have an underground cistern, a main rooftop tank and a separate one for servants’ quarters or the garden. One of them is usually forgotten.
- Apartment towers. In the newer phases and in Clifton, shared tanks serve dozens of flats. See who is responsible for an apartment building’s water tank.
- Heat. Rooftop tanks sit in the growth range for bacteria for most of the year, as explained in heat and bacteria in water tanks.
What builds up in a DHA tank
- Sand and silt from tanker loads and from first flow after outages
- Mineral scale from borehole water, as a hard white or brown crust
- Biofilm on the walls, thickest near the waterline
- Algae in rooftop tanks where light gets in
- Rust from corroded lids and fittings
Our crews’ usual findings across the city are described in what we find in Karachi’s water tanks.
Managing tanker water
- Ask where the tanker filled. A reputable operator will tell you. Official KWSC hydrants are preferable to unknown boreholes.
- Look at the first few litres. If it is visibly dirty or smells, refuse the load.
- Check the hose. A delivery hose that has been dragged along the road should not go into your tank without a rinse.
- Let it settle. Avoid pumping to the roof for an hour or two after delivery so sand sinks in the underground tank.
- Clean more often. Tanker-fed tanks need cleaning about every three months.
- Treat what you drink. Boil it, or use RO with UV. A filter and a clean tank do different jobs; see water filter versus tank cleaning.
How often should DHA residents clean their tanks?
| Situation | Recommended interval |
|---|---|
| House on mostly piped supply, tanks in good repair | Every 4 to 6 months |
| House using tankers regularly | Every 3 months |
| House on borehole water | Every 3 to 4 months, with descaling as needed |
| Old RCC underground tank (early phases) | Every 4 months, with a structural check each time |
| Apartment building or commercial premises | Every 3 months |
| After a supply crisis, flooding or a change in smell or colour | Straight away |
This follows the citywide schedule in how often to clean a water tank in Karachi. The official minimum, from the Sindh health department, is once a year before summer.
A DHA homeowner’s checklist
- List every tank on the property, including the ones nobody uses much
- Replace corroded lids with covers that seal; consider non-metal covers near the sea
- Raise the underground hatch above floor level before the monsoon
- Fit mesh to vents and overflows
- Keep each service report and note the next date
- Tell domestic staff not to enter the underground tank for any reason
The last point matters. Closed tanks can hold gas, and people have died entering them. The safety steps a crew should take are described in what happens during a professional tank cleaning, and the wider picture for this part of the city, including commercial premises, is in water safety in Clifton, PECHS and Defence.
Tank cleaning in DHA and Clifton
Our DHA Phase 2 branch covers Phases 1 to 8, Clifton, Gizri, Seaview, Zamzama and the surrounding areas, and is the nearest team for water tank cleaning in DHA and Clifton. The work follows our eight-step cleaning procedure: drainage, ventilation and gas check before anyone enters a cistern, jet washing at 3,000+ PSI, vacuum extraction, disinfection, rinse and a dated report with photographs. An underground RCC tank takes four to eight hours and a rooftop tank two to four.
For a standard house you can get a fixed price online. The branch number is 0333 0293174, answered 24 hours. Customers in the east of the city are served from Gulshan-e-Iqbal by our Gulshan and Jauhar branch.
Frequently asked questions
Is tap water in DHA Karachi safe to drink?
Do not assume so. The piped supply comes from the same system as the rest of the city, and tanker and borehole water are untested. Boil or properly filter drinking water.
Why is my water salty?
Usually because of borehole water, or a tanker that filled from a borehole. Groundwater near the coast is brackish. RO treatment removes the salt for drinking; the tank will still collect scale.
When will DHA get more piped water?
The agreement for the 10 MGD Dumlottee line was signed in September 2026 with a 12-month construction period. Earlier targets for this project were missed, so treat the date as a target.
We only drink bottled water. Does the tank still matter?
Yes. Tank water is used for bathing, brushing teeth, washing food and dishes, and wudu, none of which bottled water covers.
How long does it take to clean a large underground tank?
Typically four to eight hours for an underground RCC tank, depending on size and how much sludge it holds.
How many tanks does a typical DHA house have?
Usually an underground cistern and at least one rooftop tank, and often a separate tank for staff quarters or the garden. All of them should be on the same cleaning schedule.
Does borehole water damage the tank?
It leaves hard scale on walls and fittings and speeds up corrosion of metal parts. Scale also gives bacteria a rough surface to cling to, so tanks on borehole water need cleaning more often.
Sources
Figures in this article were checked in October 2026 against the following:
- Dawn, 9 July 2025: Cabinet approves loan for KWSC to end water shortage in DHA, Clifton
- Dawn, 13 September 2026: Agreement signed to lay Rs14bn water line from Dumlottee to DHA
- Dawn, 1 May 2026: Most Karachi areas suffer as water crisis enters second week
- Dialogue Earth, 28 July 2017: 91% of Karachi’s water unfit to drink (PCRWR results)
- Geo News, 24 August 2021: PCRWR monitoring of drinking water in 29 cities
- Geo News, 13 September 2025: Naegleria claims another life in Karachi, toll hits five in Sindh
About Khan Tank Cleaning
Khan Tank Cleaning has cleaned residential, commercial and industrial water tanks in Karachi since 2005. The company was founded by Mateen Khan, who still oversees quality control at both branches. More about us, or get in touch: 0333 0293174 for DHA and South Karachi, 0340 2717530 for Gulshan and East Karachi, both answered 24 hours.
Mateen Khan is the Founder & Owner of Khan Tank Cleaning, Karachi’s first dedicated professional water tank cleaning company (est. 2005). With 20+ years of industry experience, he leads an ISO 9001 & ISO 45001 certified team that follows a strict 8-step process using industrial equipment and food-grade disinfectants. Mateen is committed to making clean, safe water accessible to every household and business in Karachi.