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.
Barcelona is served by Barcelona-El Prat Airport, about 17 km (11 mi) from the center of Barcelona. It is the second-largest airport in Spain, and the largest on the Mediterranean coast, which handles above 37.5 million passengers per year, showing an annual upward trend.