The Water You Drink Is Only as Clean as Your Tank
Most people never think about what's growing inside their water storage tank. But sludge, algae, bacteria, and sediment accumulate silently over months — and every glass of water, every shower, every cooked meal passes through it. Professional tank cleaning is not a luxury. It's the most direct thing you can do for your family's water quality.
Your Water Supply Starts at the Tank. So Does the Risk.
In most Indian homes and apartment buildings, municipal water goes through a series of storage tanks before it reaches your tap — an underground sump, an overhead tank, and sometimes additional storage at the flat level. Each of these tanks, if left uncleaned, becomes a breeding ground for bacteria, algae, sediment, rust particles, and in some cases biological contaminants that no household water filter can reliably remove.
Studies by the Bureau of Indian Standards recommend that domestic water tanks be cleaned and disinfected at least twice a year. In practice, most residential buildings clean theirs once a year at best — and many have never been professionally cleaned at all. The consequences show up quietly: persistent stomach issues, water that smells off, sediment in bathroom tiles, and household members who seem to catch waterborne illnesses more often than they should.
Professional water tank cleaning isn't simply about making the tank look clean inside. It's about removing the accumulated biofilm, disinfecting every surface with food-grade chemicals, testing the output water quality, and certifying that what comes out of your taps is actually safe to use.
How We Clean Your Water Tank
Before we begin, our technician inspects the tank condition, checks for cracks or seal issues, and takes an initial water sample to document contamination levels and guide the cleaning approach.
The tank is drained completely. For overhead tanks, water is drained down. For underground sumps, we use submersible pumps to empty the tank fully before any cleaning begins.
All accumulated sludge, sediment, algae, and debris is manually removed and safely disposed of. This is the step most cleaning services skip — we never do.
All internal surfaces — walls, floor, inlet and outlet pipes — are scrubbed with high-pressure jet washing and long-handled brushes to remove biofilm, scale, and algae from every surface.
A WHO-approved, food-grade chlorine solution is applied to all internal surfaces at the correct concentration. The tank is then refilled to allow the disinfectant to contact all surfaces before final draining.
The tank is thoroughly rinsed to remove all disinfectant residue, checked for adequate residual chlorine levels, sealed properly, and refilled with supply water.
We collect a post-cleaning water sample and test for key indicators including bacteria, pH, turbidity, and residual chlorine. A written report is provided confirming your water is now safe.
Diseases Directly Linked to Contaminated Storage Water
Water that passes through a contaminated storage tank before reaching your taps isn't just unpleasant — it is a medically documented source of serious illness. These are the conditions most commonly linked to uncleaned domestic and commercial water tanks in India.
Children, elderly family members, and anyone with a compromised immune system are at significantly higher risk. Regular professional tank cleaning is the single most effective intervention to reduce this exposure.
- Typhoid Fever
- Cholera
- Gastroenteritis
- Legionnaires' Disease
- Hepatitis A
- Dysentery
- Food Poisoning (E.coli)
- Skin & Eye Infections
Beyond the Tank — Our Full Water & Sanitation Services
Water hygiene is not just about the drinking water tank. We cover every water storage and treatment system in your residential complex, commercial building, or industrial facility.
Overhead Water Tank Cleaning
ResidentialComplete cleaning of rooftop storage tanks — plastic, fibreglass, RCC, and stainless steel. Includes full draining, sludge removal, high-pressure scrubbing, food-grade disinfection, and water quality verification.
Underground Sump Cleaning
Residential & CommercialUnderground sumps collect the highest levels of sediment and bacterial biofilm. We use submersible pumps, specialised long-reach equipment, and confined-space entry protocols to clean these safely and thoroughly.
Commercial & High-Rise Building Tanks
CommercialLarge-capacity tanks in apartment complexes, office towers, malls, hotels, and hospitals require scheduled maintenance and certified cleaning records. We handle tanks of all sizes and issue compliance documentation.
STP — Sewage Treatment Plant Cleaning
STP MaintenanceSewage Treatment Plants in residential complexes, commercial buildings, and industrial units require regular de-sludging, chamber cleaning, aeration system servicing, and biological media maintenance. We handle complete STP upkeep and emergency de-clogging.
ETP — Effluent Treatment Plant Cleaning
IndustrialEffluent Treatment Plants in industrial, pharmaceutical, and manufacturing facilities accumulate chemical sludge and scale that impair performance over time. Our team provides tank de-sludging, chamber cleaning, and complete ETP maintenance service.
Rainwater Harvesting System Cleaning
RWH MaintenanceRainwater harvesting systems — collection tanks, first-flush diverters, filter media, distribution pipes — require annual servicing to remain effective. We clean RWH tanks, flush sediment, replace filter media, and inspect all components to ensure your system captures and stores clean water.
Water Recycling Tank Cleaning
Greywater SystemsGreywater recycling tanks, treated water storage for flushing or irrigation, and other secondary water storage systems accumulate biofilm and odour over time. We clean, disinfect, and restore these systems to full operational efficiency.
Swimming Pool & Water Feature Cleaning
SpecialistSwimming pools, water features, fountains, and decorative ponds require regular chemical balancing, de-algaing, filter backwashing, and full drain-clean cycles. We provide both routine maintenance and one-time restoration cleans.
Water Quality Testing
Testing & CertificationStandalone water quality testing services for domestic, commercial, and industrial water sources. We test for bacterial contamination, pH, TDS, turbidity, hardness, nitrates, and other key parameters — and provide a written certified report.
Tank Repair & Waterproofing
Repair ServiceCracks, leaks, and de-bonding linings in water tanks not only waste water but also allow external contamination. We provide tank crack repair, joint sealing, internal waterproofing coatings, and lid/seal replacement.
Hospital & Healthcare Facility Tanks
High-PriorityWater quality in hospitals and clinics is governed by strict safety standards. We provide certified tank cleaning with full documentation, Legionella risk management, and compliance-ready water quality reports for healthcare environments.
Annual Maintenance Contracts (AMC)
Ongoing ContractScheduled bi-annual or quarterly tank cleaning contracts for housing societies, commercial buildings, and industrial facilities. Includes priority scheduling, water quality testing, maintenance records, and a dedicated account manager.
We Clean Every Type of Water Storage Tank
Different tanks are made of different materials and have different access points, contamination risks, and cleaning requirements. Our technicians are trained on all types.
Plastic / PVC Tanks
The most common type in Indian homes. Prone to algae growth on inner walls due to translucency. Requires gentle scrubbing with non-abrasive tools to avoid surface scratching that encourages bacterial adhesion.
RCC / Concrete Tanks
Common in older buildings and underground sumps. Concrete surfaces are porous and require thorough high-pressure scrubbing to remove biofilm from the surface texture, plus crack inspection and sealing where needed.
Stainless Steel Tanks
Typically used in commercial and industrial settings. While more hygienic than plastic or concrete, they still accumulate sediment, scale, and biofilm at joints and inlets. Cleaned using acid descaling and disinfection protocols.
Fibreglass Tanks
Common in large apartment buildings and commercial complexes. Fibreglass surfaces can develop resin degradation over time. We clean with pH-appropriate solutions and inspect internal surfaces for signs of structural degradation.
Rainwater Harvesting Tanks
RWH storage tanks collect first-flush debris, airborne particulates, and rooftop runoff — all of which settle as sludge. Regular cleaning and filter replacement is essential for these tanks to remain an effective water conservation resource.
Industrial & Process Water Tanks
Large-volume tanks in industrial facilities, cooling towers, and manufacturing plants require specialised de-scaling, chemical neutralisation, and confined-space entry procedures. Our trained industrial cleaning team handles these with full safety compliance.
Why Families & Buildings Across India Trust Us
Water safety isn't something to take chances with. Here's what makes AKS Facilities the consistent choice for tank cleaning across thousands of homes and commercial properties.
Unlike most cleaning services that simply clean and leave, we test the water after every clean. You receive a written water quality report confirming bacterial levels, pH, and safety indicators — so you have documented proof, not just our word.
We use only WHO-approved, food-grade disinfectants at clinically correct concentrations. No harsh industrial chemicals enter your drinking water supply. The disinfectant is fully rinsed before refill and residual levels are verified.
Our tank cleaning technicians are trained in confined-space entry safety, water contamination biology, and chemical handling. Every team member is background-verified and works under a certified supervisor on every job.
We provide a detailed cleaning report, photographic documentation, and water quality certificate after every service — meeting the requirements of housing societies, municipal bodies, and corporate compliance teams.
We coordinate with your building manager and schedule cleaning to minimise the time residents are without water. Most overhead tank cleans are completed within 3–4 hours; sumps within 4–6 hours.
All our services are covered by comprehensive liability insurance. In the unlikely event of accidental damage to your tank, fixtures, or water infrastructure, you are fully covered — no disputes, no delays.
8 Signs Your Water Tank Needs Cleaning Right Now
Your tank won't tell you when it's contaminated. But it does leave clues. If you're experiencing any of these, don't wait — call us today.
A musty, earthy, or unusually strong chlorine smell in your tap water is a classic sign of algae growth or bacterial activity inside your storage tank.
Yellow, brown, or rusty coloured water indicates sediment, rust particles, or algae being disturbed from the tank floor and entering your supply — a direct health risk.
If household members experience recurrent stomach upsets, diarrhoea, or nausea with no other obvious cause, contaminated storage water is one of the first things to investigate.
If you can see algae growth or black mould on the interior walls of your tank during a visual inspection, your water quality is already seriously compromised.
Even if there are no visible signs, bacterial biofilm builds up steadily in any storage tank. If it has been 6 months or more, a professional clean is due — regardless of appearances.
If you're regularly cleaning sediment from tap aerators, washing machine filters, or water purifier pre-filters, that debris is coming from your storage tank and indicates the tank base is full of sludge.
New construction leaves cement dust, pipe scale, and chemical residue in tanks. After any renovation work, a professional clean and water quality test is essential before the water is safe for drinking or cooking.
Finding mosquito larvae, small insects, lizard droppings, or animal debris in or near an open tank requires immediate professional cleaning and disinfection before the water is used again.
What People Say After Their Tank Is Cleaned
Real feedback from residents, housing societies, and commercial clients across Delhi NCR and beyond.
"Our RWA had never arranged a professional tank clean in 6 years. When we finally booked AKS Facilities, the photos they showed us of what came out of our overhead tanks were genuinely shocking — dark sludge and visible algae. The water quality report afterwards confirmed it was now safe. Every housing society should do this annually."
"We had been getting recurring stomach issues for months before we finally booked a water tank inspection. AKS found significant bacterial contamination in our underground sump. After the clean and disinfection, they gave us a written quality certificate. The stomach problems stopped within two weeks. I wish we'd done this sooner."
"We required STP servicing and tank cleaning for our 200-flat complex in Gurgaon. AKS Facilities handled both, coordinated with our building manager, completed the work over a weekend to minimise disruption, and provided full compliance documentation. Professional, efficient, and thorough."
Honest Answers to Your Questions
Before you book, here are the things people ask us most — answered plainly.
Water Tank Cleaning Services Across India
Clean water is a right, not a privilege — and we're making professional tank cleaning accessible across Delhi NCR, every major metro, and hundreds of cities nationwide. Find your city below.
Delhi NCR — Water Tank Cleaning Services
Maharashtra
Karnataka
Tamil Nadu
Telangana & Andhra Pradesh
West Bengal
Gujarat
Rajasthan
Punjab & Haryana
Uttar Pradesh
Madhya Pradesh & Chhattisgarh
Other Major Cities Across India
Clean Water Starts With a Clean Tank. Book Today.
Don't leave your family's water safety to chance. One professional clean — and a written water quality certificate — gives you the assurance you deserve.
Fast booking · Same-day slots in Delhi NCR · Water quality report included · Fully certified