It’s a Sunday morning in Nairobi. You turn on the tap and the water has a faint brown tint and a smell you can’t place. You boil it anyway and move on. But that small moment is often the first sign of a bigger problem: a water tank that hasn’t been cleaned in far too long.
If you’ve wondered how often to clean your water tank in Kenya, this guide covers the warning signs, why sediment builds up, and why water tank cleaning in Kenya is a job for trained professionals.
How Often Should You Clean Your Water Tank?
At least once every six months, and no less than once a year, even if the tank looks fine. Clean more often if you:
- Collect rainwater from your roof.
- Use borehole water, which carries fine sand and silt.
- Store water because of rationing in Nairobi, Mombasa, Kisumu, Nakuru or Eldoret.
- Have an old, cracked or poorly sealed
- Manage an apartment block, school, clinic or hospitality and Airbnb property.
7 Signs Your Water Tank Needs Cleaning
- Cloudy, brown or yellowish water. Often sediment stirred up from the bottom.
- A musty or metallic smell. Fresh water has almost no smell.
- A strange taste in your tea, cooking or drinking water.
- Slime or green algae inside the tank.
- Visible dirt, insects or debris. If you see pests around the tank, a pest control check helps too.
- Frequent stomach upsets, especially among children and the elderly.
- Blocked taps or low pressure caused by sediment in your pipes.
Spot even one? Book an inspection. Don’t wait for all seven.
Why Does Sediment Build Up in Tanks?
Even treated water carries tiny particles that settle at the bottom. Silt and sand arrive with mains, borehole and tanker water. Rust and scale flake off ageing pipes. Dust, leaves and bird droppings slip in through loose lids and vents. Algae and biofilm grow where water sits warm and still. Every refill can stir it all back into the water you use.
Why Disinfection Matters
A rinse or a splash of bleach is not enough. Proper water tank disinfection means draining the tank, removing sludge, scrubbing the walls, applying the right disinfectant at the correct strength and contact time, flushing out residue, and checking lids and vents. Too little won’t kill germs. Too much leaves harmful residue. It is what separates a clean-looking tank from a genuinely safe one.
What Homeowners, Landlords and Apartment Managers Should Check
- Homeowners: set a six-month reminder, keep the lid tight and the vent covered, and look for cracks or algae.
- Landlords: keep dated cleaning records and inspect tanks between tenants. See the industries we serve.
- Apartment managers: schedule every rooftop, underground and break tank, warn residents in advance, and ask for a cleaning report. A commercial cleaning contract keeps it on schedule.
Why Leave It to Trained Professionals
Tanks are confined, slippery and often at height. The wrong chemical mix can harm you and your water, and DIY cleaning misses hidden biofilm. A trained, insured team brings the safety gear and process to do it properly. We handle the climbing, draining, scrubbing and flushing, so you get safe water without the risk.
Book Professional Water Tank Cleaning and Disinfection with S & M Cleaners Limited
Clean water is the foundation of a healthy home, a safe workplace and a trusted rental property. Keeping your tank in shape is simple: inspect regularly, clean on schedule and disinfect properly.
We clean and disinfect roof, ground and underground tanks for homes, estates and businesses across Nairobi, Mombasa, Kisumu, Nakuru, Eldoret and beyond. Pricing depends on tank size, type and condition, so request a free written quote first.
Open Monday to Saturday, 8am to 9pm.