A technician washing the inside wall of a water tank with a pressure hose

Water tank cleaning in Al Mahjar Jeddah

Al Mahjar is a south Jeddah district west of Al Wazeeriyah toward the coast, a mixed area where King Abdulaziz Hospital occupies the old quarantine station site. King Faisal Road runs through it, Petromin Souq and the old popular quarter of Petromin adjoin it, and the Islamic Port and the Refinery are close. Open drainage channels cross the district carrying waste from the markets. High humidity and salt from the port and the refinery, combined with heavy lorry traffic, mean the tank here faces multiple sources of contamination.

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Potable-rated materials

Linings and disinfectants cleared for drinking water tanks, not general-purpose products.
You get the downtime first

How many hours the tank is out of service, told before we start rather than after we finish.
A first-draw flush

We run the first draw off after refilling, and the tank is not handed back until the water runs clear.
Ground and roof tanks

Villas, apartment blocks and premises that need a written record of each visit.

Why the job is different in Al Mahjar

In Al Mahjar near the refinery and the port, the tank receives high saline humidity, dust from lorry traffic enters through vents, and waste from the markets attracts insects. The method is set out in full on Water tank cleaning in detail.

The first reason

Open drains carry waste, rodents and insects toward the tank

Petromin Souq and warehouses in the district dump waste into open drainage channels. These channels run close to building tanks, and rats, cockroaches and larger insects live in them. After rain water levels rise in the channels and approach tanks and the lower openings. Frequent cleaning is essential because contaminants enter easily.

The second reason

Salt and humidity from port and refinery speed rust and deposits

The Islamic Port and the Refinery are very close and raise salt laden humidity and heavy smoke. Salt deposits rapidly on the tank and pipes, and the smoke carries particles that enter through vents. Rust grows fast, and salt resistant bacteria grow in the water. Disinfection here must be stronger than in inland districts.

The third reason

Heavy traffic and lorries raise polluted dust that enters the tank

King Faisal Road is busy with heavy lorries and buses, and their movement raises dust from the road and pollutants. This dust enters through simple ventilation holes and cracks. Contaminants include metals from the road surface and exhaust fumes from engines, and disinfection must use strong measures.

Al Mahjar on the map

Al Mahjar sits about 3 km from Al Wazeeriyah and about 4 km from Al Saruriyah.

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Before treatment

The condition of the tank decides the method

Al Mahjar is a south Jeddah mixed district with shops and hospitals, crossed by King Faisal Road with heavy traffic, close to the port and the refinery which raise humidity, and has open drainage channels that carry market waste.

Fine brown sediment beneath shallow water

The layer on the floor

The floor collects organic waste and coloured rust from the road and refinery, requiring mechanical removal and strong disinfection.

Light and algae

Walls carry salt resistant algae and bacteria that grow fast from high salt humidity.

A damp concrete wall carrying a dark deposit

The deposit on the wall

The deposit on walls is layered salt, metals and salt resistant bacteria that need additional chemical cleaning.

A concrete surface with a fine hairline crack

The lining and hairline cracks

Cracks and lining allow drain water and contaminants from nearby open channels to seep inward.

The lid of a water tank on a building roof

The lid and the access hatch

Cover and vents carry road dust, salt and market waste residue, needing vigorous rinsing and protective coating.

A plastic pipe leaving the exterior wall of a building

The vent and the overflow pipe

Overflow and vent pipes carry leakage of salt, metals and bacteria, and may need replacement near the souq.

How we work

1
Inspect before the drain

Tank type and material, the condition of the lining, the depth of the sediment, the lid and the vent, and where the drained water will go. We agree the window without supply before anything is opened.
2
Drain, then lift the sludge

The water leaves through the outlet, then the layer beneath it is taken out by hand and by suction. That layer is the reason for the visit, not the water that ran out ahead of it.
3
High pressure wash

Walls, floor and the joint where they meet, with a brush wherever the film resists, then the wash water is taken out completely so nothing we lifted settles again.
4
Disinfect and put back in service

Disinfectant over every internal surface, left for its contact time and then rinsed out, followed by the refill, a first draw off at the taps, and a report on what was inside the tank.

What water tank cleaning includes

An inspection before the valve

Tank type, lining condition, depth of sediment, lid and vent, recorded before any water leaves.
Full drain and sediment removal

The water through the outlet, and the layer below it by hand and by suction until the floor itself is showing.
Pressure washing walls and floor

High pressure across the surfaces and corners, and a brush on anything water alone will not lift.
Disinfection after the wash

A disinfectant intended for drinking water tanks, named to you before it is used, left for its contact time and then rinsed out.
Refill and the first draw off

We refill, run the taps so the new water moves through the pipework, and tell you when it is ready to use.
A report and the next date

What was inside the tank, anything on the lid or the lining that needs repair, and a sensible date for the next clean.

What is different about South Sub-Municipality

The South sub municipality runs from the edge of Old Makkah Road down to Al Khumrah and the southern corniche. Dense residential districts sit beside new subdivisions such as Al Sanabil and Al Taawun, warehouse fringes such as Al Saruriyah and Al Sarawat, and an old seaside settlement at Al Quzayn. Open stormwater channels cross the housing, and the warehouses, the vegetable and livestock markets and the nearby Islamic Port and Industrial City give pests shelter, food and year round humidity. Pressure is greatest in the older quarters, where drainage networks are ageing.

Questions about this district

The district has warehouses and vegetable and livestock markets. Is the tap water safe from the tank?

Markets dump waste and animal remains into open channels. Bacteria and parasites from this waste may enter the tank through cracks and openings. Strong frequent disinfection is essential, and additional home filtration is important.

There is an open drain beside the villa and after rain water approaches the tank. Is that dangerous?

Yes, very dangerous. Drain water carries waste and bacteria and may enter the tank through cracks if it approaches close. The tank may need to be raised or a protective wall built around the villa.

The tank is close to King Faisal Road and lorries raise lots of dust. How often to clean it?

King Faisal Road is busy and lorries raise polluted dust constantly. The tank here needs cleaning every three months at minimum, more often than quiet districts.

Water from the tap runs reddish and has a strong metal smell. Is it the road and the refinery?

Red is iron, and metals come from the road, the refinery and engine exhaust. Salt laden humidity and refinery smoke carry metals in the air. The tank needs deep cleaning and strong disinfection.

Is Al Mahjar tank cleaning different from a coastal district like Al Quzayn?

Yes. Al Mahjar is closer to the port and refinery than Al Quzayn. Pollutants are greater and open drains are a constant threat. Cleaning needs stronger chemicals and shorter intervals.

Petromin Souq and lots of waste around it. Does it affect the tank water?

The souq dumps organic and animal waste into open channels. This waste attracts rats and insects, and waste bacteria enter the tank through cracks and vents. Tanks near the souq need special protection and frequent cleaning.

How much does water tank cleaning in Al Mahjar cost?

It is set after the inspection, because the price follows the type of infestation, the size of the space, how far it has spread and the number of visits it needs. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Al Mahjar.