The volume of surface waters in Andorra of high quality in 2016 was 86%. The remaining 8% of water has acceptable quality, 3% – poor quality and 3% – very poor quality, reported the Ministry of Environment, Agriculture and Sustainable Development of Andorra on the eve of the celebration of World Water Day on 22d March. For comparison: in 2005 only 40% of the surface waters of Andorra had high quality.
According to the Minister of Environment, Agriculture and Sustainable Development Sílvia Calvó, Andorra annually celebrates World Water Day, carefully preparing for this event. According to her, today Andorra purifies almost 100% of sewage. Work on wastewater purifying began in 1996. Since then, 4 plants have been installed in Andorra. Today, the Ministry monitors water quality through 37 stations by sampling at different time intervals.
The improvement of water quality is evidenced by the fact of the restoration of the fauna of the river and the return of the otter population into Andorran ecosystem.
The Ministry also conducts active work on the cleaning of rivers, extracting solid waste. In particular, 17.7 thousand tons of waste were extracted last year, which is 28 kg / km. In 2010, this ratio was 150 kg / km.