Water is life, but in a city like Kathmandu, your water storage tank could be the very thing making you sick. Whether you rely on tap water, private tankers or deep boring, the sediment and bacteria that settle at the bottom of your tank are silent health hazards.
We will break down the water tank cleaning price in Kathmandu for 2026, explain our professional 7-step disinfection process and help you understand why “DIY” cleaning might be costing you more in the long run.
Why is Water Tank Cleaning Critical in Kathmandu?
Kathmandu’s water supply is notorious for its high mineral and sediment content. Whether it is the “yellow water” from local boring or the dusty water delivered by tankers, your storage tank acts as a giant filter, trapping mud, rust and organic matter.
The Hidden Dangers in Your Tank:
- Biofilm and Algae: Warm temperatures on Kathmandu rooftops cause algae to grow rapidly inside Hilltake (plastic) tanks. This biofilm protects harmful bacteria like E. coli.
- Heavy Metal Accumulation: Iron and manganese are common in Kathmandu’s groundwater. These settle as a thick, reddish-sludge that clogs your pipes and damages expensive RO filters.
- Pathogens: Contaminated tanks are breeding grounds for waterborne diseases such as Typhoid, Cholera and Giardia frequent issues in the Kathmandu Valley.
Water Tank Cleaning Price in Kathmandu (2026 Price List)
Transparency is our priority. Below is a detailed breakdown of what you should expect to pay for professional cleaning services in Kathmandu, Lalitpur and Bhaktapur.
1. Overhead Plastic (Hilltake/Steel) Tanks
These are usually located on the roof. They are easier to access but require careful chemical handling so as not to damage the plastic.
| Tank Capacity (Liters) | Estimated Price (NPR) | Service Time |
| 500L – 1000L | Rs. 1,000 – 1,500 | 45 Mins |
| 1500L – 2500L | Rs. 1,500 – 2,500 | 1.5 Hours |
| 3000L – 5000L | Rs. 3,000 – 4,500 | 2 Hours |
2. Underground Concrete (Reserve) Tanks
Reserve tanks are often larger and contain years of accumulated sludge from tanker deliveries. They require industrial d grade pumps and professional entry.
| Tank Capacity (Liters) | Estimated Price (NPR) | Extra Charges |
| Up to 5,000L | Rs. 2,500 – 3,500 | None |
| 5,000L – 10,000L | Rs. 3,500 – 5,500 | Transport (Outside Ringroad) |
| 10,000L – 20,000L | Rs. 6,000 – 9,000 | N/A |
| 20,000L+ | Rs. 0.40 – 0.70 per Liter | Negotiable |
Our Professional 7-Step Cleaning Process
Many local “plumbers” or “helpers” claim to clean tanks with just a broom and a bucket. This often does more harm than good by scratching the tank walls, creating more space for bacteria to hide.
At United Facility Service, we use a scientifically backed 7-step method:
Step 1: Pre-Inspection & Dewatering
We start by inspecting the structural integrity of the tank (looking for cracks or leaks). Then, we use high-capacity submersible pumps to drain the water quickly, ensuring we don’t waste your time.
Step 2: Sludge Removal
Once empty, our technicians enter the tank (using proper PPE) to manually remove the thick layer of mud, sand and debris that pumps cannot catch.
Step 3: High-Pressure Jet Cleaning
We use 150-bar pressure washers to blast the ceiling, walls and floor. This removes “stubborn” algae and biofilm that a manual brush simply cannot reach.
Step 4: Vacuuming
We use industrial wet-vacuums to suck out every last drop of dirty water and loosened grime, leaving the floor bone dry and spotless.
Step 5: Antibacterial Treatment (Disinfection)
This is the most important step. We apply a food grade, safe disinfectant (often a stabilized chlorine or hydrogen peroxide solution) that kills 99.9% of bacteria, viruses and fungi.
Step 6: Final Rinse & Quality Check
The tank is rinsed one last time with fresh water to ensure no chemical residue remains. We then seal the lid tightly to prevent mosquitoes and dust from entering.
DIY vs. Professional Cleaning: The Real Cost
You might think cleaning the tank yourself saves money, but consider these factors:
- Health Risk: Entering a confined space like an underground tank without oxygen checks or proper gear is dangerous.
- Incomplete Sterilization: Home bleach or soaps often leave a smell or fail to kill the “biofilm” layer.
- Equipment Cost: A professional high-pressure jet costs over Rs. 30,000. Without it, you are just moving the dirt around.
- Time: What takes you a whole Saturday takes our team 90 minutes.
How to Maintain Your Water Quality Between Cleanings
While we recommend professional cleaning every 6 months, here are a few tips for Kathmandu homeowners:
- Check the Lid: Ensure your Hilltake lid isn’t cracked. Sunlight entering the tank causes instant algae growth.
- Filter the Inlet: If you use tanker water, install a “first-stage” mesh filter on your inlet pipe to catch big sand particles before they enter your tank.
- Inspect After Rain: After a heavy monsoon downpour, check your underground tank for seepage or dirty runoff water.
Why Choose United Facility Service?
With over 17+ years of experience in the Kathmandu Valley, United Facility Service Pvt. Ltd. is more than just a cleaning company. We are a government-registered facility management partner.
- Experienced Staff: Our team is trained in “Confined Space Entry” and safety.
- Eco-Friendly: We use chemicals that are safe for your family and the environment.
- Affordable: We offer the most competitive water tank cleaning prices in Kathmandu without compromising quality.
Ready for Crystal Clear Water?
Stop worrying about what’s at the bottom of your tank. Let the experts handle the mess so you can enjoy the peace of mind that comes with clean water.
1. Is the water safe to drink immediately after cleaning?
Yes. Because we use food grade disinfectants and perform multiple rinses, the water is safe for all domestic use as soon as the tank is refilled.
2. Do you provide services in Lalitpur and Bhaktapur?
Absolutely. We cover all areas including Baneshwor, Koteshwor, Lalitpur (Jamsikhel, Jhamsikhel), and Bhaktapur.
3. Will cleaning the tank increase my water pressure?
Often, yes! Sludge and rust from the tank often clog the “pipes” leading to your taps. By cleaning the tank, we prevent these clogs, which can improve the flow in your showers.
