The STEM plant produces an average of 6m3 of consumable water per hour, four times the volume of its predecessor, the Mobile Water Treatment Unit (MWTU). If seawater is used, its capacity will be reduced to 3m3 per hour. In operation, the number of tanks can be multiplied, thus increasing the raw water storage capacity. Used in the Tarn, the plant produces 20,000 litres of water to supply the drinking water needs of 250 people per day. This innovation makes it possible to produce and distribute drinking water in complete autonomy and safety, from natural sources. Its capacity to supply the drinking water needs of up to 800 people per day.