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Sunrise at Mt. Boutmezguida

children of the village

People grow modest amounts of fruit and vegetables.

Digging the holes for concreting the anchors

Dismantling the gauge

Adjusting the clamps

Assembling the fabric

typical food

Tensioning the fabrics with rubber rings

Worlds largest fog collector park


liter / fog day
per 1 m²


liter / fog day
per FogCollector (54 m²)


liter / fog day
per 31 FogCollector (1.674 m²)

The project on Mount Boutmezguida is located in the Aït Baamrane area in the  Anti-Atlas mountains near the coastal town of Sidi Ifni.

The population is largely made up of Berber communities, especially women, children and elderly people: the men are often absent for months at a time, looking for work in the towns. In recent years, the region has been increasingly threatened by drought; the desert has spread and the water table is steadily sinking. However, there is still a plentiful supply of atmospheric water vapour from the clouds and fog around Mount Boutmezguida.


The aim

To connect every house to 31 CloudFisher collectors.

5 cisterns ensure that the water remains available during most of the dry season.


Girls in the villages no longer have to fetch water from wells in the valley.

People can grow modest amounts of fruit and vegetables.

16 villages in the valleys around Boutmezguida and a school are provided with drinking water.

Around 1.300 inhabitants will have a water supply of 12,3 litres per day.

map morocco Boutmezguida


​Project start

Fog collectors



Morocco, Mount Boutmezguida

until 2018
31 collectors with a total net area of 1,674 square meter
1.300 inhabitants, 7.000 animals
Dar Si Hmad, Victoria Marzol (Universidad of La Laguna), TU München


In January 2017 the expansion of 30 CloudFisher was launched. 15 collectors were installed in collaboration with local construction companies and organised by the Dar Si Hmad Foundation. Another 15 CloudFisher collectors will follow in 2018. This is the world's largest collector park, with 1,674 square metres of mesh space.

The WaterFoundation, who is responsible for the project, commissioned aqualonis with its implementation.

4 Moroccans work on the groundings for the CloudFisher fog collector construction.


In November 2013, the WaterFoundation and aqualonis set up a pilot system in the Anti-Atlas Mountains to study how fog collectors can become a reliable source of clean water.

  • The system has provided essential information on construction methods and optimal design of the collector nets.

  • Researchers from the Technical University of Munich (TUM) have been monitoring the performance of the pilot system on a daily basis.

  • The necessary measuring instruments are operated by the TUM. They provide information, updated through the day, on wind speed and wind direction, on relative humidity and temperature, and on precipitation and the amounts of water collected.

  • The data are analysed and evaluated by members and students of the Department of Ecoclimatology at the TUM.

measuring device for air temperature and relative humidity connected to the CloudFisher fog collector.

Air temperature and relative humidity

measuring device for wind direction and speed connected to the CloudFisher fog collector.

​Wind direction and speed

Precipitation gauge connected to the CloudFisher fog collector.

Precipitation gauge

Tipping counter for exact measurement of water yields connectes to the CloudFisher fog collector.

Tipping counter for

exact measurement

of water yields

The pilot system was co-financed by the Munich Re Foundation and WaterFoundation.

different types of mesh for fog collector net

Mesh types

10 different fabrics were tested for their efficiency: woven mesh and fabrics made of stainless steel produce a lower water yield than three-dimensional spacer fabrics, which aqualonis has been using ever since. This is mainly due to the fact that spacer knitted fabric has a larger surface area than flat fabric. The specially produced monofilaments were developed for use in food safety and for extreme UV radiation.

We periodically examine the monofilaments for their durability. The following pictures will show that even after 2.5 years of continuous use no wear has become visible.


Water analysis

Fog water is drinking water.

Our analysis has shown that fog water is suitable as drinking water for villages located in valleys of Boutmezguida. Under the following link, you can find relevant values compared to threshold values according to the German Drinking Water Ordinance (DWO) and the standards of the WHO.

Download water analysis

Person taking a water test probe for drinking water standards.


June 2006 saw the launching of a joint project of the Dar Si Hmad Foundation (Morocco) and the University of La Laguna (Canary Islands), headed by Professor Maria Victoria Marzol and Dr José Luis Sánchez Megía, to study the viability of obtaining drinking water from fog. Measurements showed that Mount Boutmezguida was particularly suitable for this purpose.

​​Download summary about fog harvesting on Mount Boutmezguida by V. Marzol.

small fog test collector with measurement devices
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