High water bill: how to find a hidden leak in your Moroccan home
Photo : neffk · BY 2.0
Updated 2026-10-21
Your water bill has doubled but nothing changed at home? Most of the time the cause is a leak you cannot see: a toilet that runs day and night, a roof-tank float valve overflowing, a pipe seeping inside a wall. This matters even more if your property in Morocco sits empty for months. Moroccan water tariffs are also tiered, so every extra cubic metre can push you into a pricier bracket. Here is how to check yourself in under an hour, and when to call a plumber (plombier, or bloumbi / بلومبي in Darija).
Why a small leak costs so much
Water prices in Morocco are set by monthly consumption tiers. The first, so-called social tiers are sold well below real cost; above them, the price per cubic metre rises sharply. In Casablanca, for example, the former distributor explained that progressive billing applies up to 12 m³ a month, with a higher rate above that.
In practice, a toilet that runs constantly can add several cubic metres a month and tip a whole household into a higher tier. The bill then rises far more than the volume of water lost.
Step 1: the meter test
This is the most reliable test and it costs nothing.
- Close every tap and make sure nobody uses water (washing machine, toilet, garden watering, a water heater refilling)
- Write down the meter reading, or photograph it
- Wait one to two hours without using water, ideally overnight
- Read it again: if the number moved, there is a leak after the meter
- If the meter still turns with the main valve just after it closed, the leak is probably between the meter and that valve
Step 2: the usual suspects
Once a leak is confirmed, check in this order, from most common to hardest.
- Toilet cistern: add a few drops of food colouring to the tank without flushing. If colour reaches the bowl within 15–20 minutes, the seal or mechanism is leaking
- Roof tank or reservoir: very common in Morocco. A stuck float valve lets water overflow through the overflow pipe, often unseen
- Water heater: a safety valve that drips constantly into the drain can waste a lot of water
- Taps and flexible hoses under sinks: damp patches, swollen cabinets, a musty smell
- Booster pump (surpresseur): if it kicks in by itself at night, water is escaping somewhere
- Pipes inside walls or underground: damp stains on walls or ceilings, tiles that sound hollow, an unusually green patch in a villa garden
What if it isn't a leak?
Compare the bill with previous months and check the reading printed on it: does it match your meter? A bill based on an estimated reading, or a misread meter, can produce a spike followed by a correction.
If the meter does not move during the test and the billed reading is wrong, file a written complaint (réclamation) at your distributor's office (your region's SRM or the local utility, depending on the city), with a dated photo of the meter and a copy of the bill. Keep your receipt. You can also ask for the meter to be checked.
When to call a plumber
A toilet mechanism or tank float valve is often a quick swap. Call a plumber if the leak is inside a wall, if you cannot find the source, or if a stain appears at the neighbour's below. A leak after the meter is the owner's responsibility; on a building's shared riser, tell the syndic (building manager) first.
- Show them your meter test result: it saves time
- Ask for the price before work starts, especially for leak detection that may mean breaking tiles
- Redo the meter test together once the repair is done
Finding a plumber with AloAji
On aloaji.ma, search 'Plombier' and your city to find a plumber nearby, then call or WhatsApp them directly, for free. Send a video of the meter turning or the damp patch, handy if you are managing the property from abroad. 'Non vérifié' profiles are businesses not yet checked by AloAji: read reviews and ask for a clear price.
FAQ
How do I know if I have a hidden water leak?
Close all taps, note the meter reading and come back one to two hours later without using water. If the reading moved, there is a leak after the meter.
Can a leaking toilet really raise my bill that much?
Yes. A constant trickle can add several cubic metres a month and push consumption into a more expensive tier.
Who pays to fix a leak?
After the meter, the property owner. Before the meter, the distributor. On a building's shared riser, usually the co-owners via the syndic.
My bill is high but there's no leak. What now?
Compare the billed reading with your meter. If they differ, file a written complaint at the distributor's office with a dated meter photo and ask for a meter check.
How much does leak detection cost?
There is no fixed price: it depends on access, time and repairs. Ask the plumber for a price before they start.