Blue or blue-green stains on sinks, baths and porcelain, indicate that there is probably copper in the water supply. Copper is usually from the corrosion of copper plumbing. The amount of copper can be found by sending a water sample to a lab for testing.
Barcelona, the traditional centre of Catalan movements for independence, is the capital of both the province of Barcelona and the autonomous community of Catalonia. The city is governed as a municipio (municipality) of Spain, and its elections are held every four years.
Founded as a Roman city, in the Middle Ages Barcelona became the capital of the County of Barcelona. After merging with the Kingdom of Aragon, Barcelona continued to be an important city in the Crown of Aragon as an economic and administrative centre of this Crown and the capital of the Principality of Catalonia.