How much does it cost to fill a pool in Spain in 2026?
One of the questions that most concerns pool owners is how much it costs to fill a pool with water in Spain. The answer depends on several factors: the pool’s volume, the price of water in your municipality, and any restrictions imposed by your autonomous community. In this article, we’ll explain how to calculate it and provide updated data for 2026.
How to Calculate Your Pool’s Volume
Before calculating the cost, you need to know how many cubic meters of water you’ll need. The formula depends on the shape of your pool:
Rectangular pool: Length × Width × Average depth = Volume in m³. For example, an 8×4-meter pool with an average depth of 1.4 meters has a volume of 44.8 m³.
Round pool: π × Radius² × Average depth. A round pool 5 meters in diameter and 1.3 meters deep has a volume of about 25.5 m³.
L-shaped or other irregularly shaped pools: Divide the pool into rectangular sections, calculate the volume of each section, and add them together.
Price of Drinking Water in Spain in 2026
The price of water varies considerably between municipalities and autonomous communities. Generally speaking, the price of water for domestic use in Spain in 2026 ranges from 1.50 to 4.00 euros per cubic meter, depending on the consumption bracket and the region.
The cities with the most expensive water are generally those in areas with the greatest water scarcity, such as Murcia, Almería, or the Canary Islands. The cheapest are usually found in the northern part of the peninsula, where water resources are more abundant.
Actual Cost of Filling Typical Swimming Pools in 2026
Using this data, we can calculate the approximate cost for pools of different sizes:
Small pool (30 m³ of water): Between 45 and 120 euros, depending on the municipality. This would be a pool measuring approximately 5×3 meters with an average depth of 2 meters.
Medium-sized pool (60 m³ of water): Between 90 and 240 euros. This is equivalent to a pool measuring about 8×4 meters with an average depth of 1.9 meters.
Large pool (100 m³ of water): Between 150 and 400 euros. For pools measuring 10×5 meters or larger.
Water Use Restrictions by Autonomous Community
In years of drought, several autonomous communities impose restrictions on filling swimming pools. In 2024 and 2025, Catalonia, Eastern Andalusia, and some areas of Castilla-La Mancha implemented temporary restrictions on filling private pools. For 2026, the situation will depend on cumulative rainfall.
It is essential to check with your local city hall or water utility before filling your pool, especially during the summer months. Some municipalities allow filling with well or cistern water as an alternative.
Full Refill vs. Partial Water Change
It is not always necessary to completely drain the pool to renew the water. The most recommended practice is to partially renew 20–30% of the water once or twice per season, thereby maintaining the chemical balance without wasting resources. A complete drain is recommended only when:
Cyanuric acid levels exceed 100 mg/L. There are persistent algae problems that do not respond to treatment. You plan to renovate the pool lining (such as installing a new reinforced liner). Severe water contamination is detected.
How to Reduce Water Loss in Your Pool
A pool in good condition loses between 2 and 5 centimeters of water per week due to evaporation in the summer. If losses are greater, there may be a leak in the pool lining. Reinforced liner is the best protection against water loss due to seepage: its complete waterproofing eliminates leaks through cracks or concrete joints.
Using a pool cover during the hottest hours of the day can reduce evaporation by up to 70%, saving hundreds of liters a day in the summer. Rainwater recirculation systems or the use of well water (where legal) are also sustainable alternatives.
At ArgPiscinas, we are committed to treating water as a valuable resource. That’s why we recommend reinforced liner as the most watertight lining option to minimize losses. Visit argpiscinas.es to learn more about our waterproofing services and request a no-obligation quote.
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