These charts show water quality compliance each month against the regulatory standards at consumers' taps across the last few years. The 10 Key Parameters are shown, although 46 parameters are tested for in total. Further testing is done at treatment works and storage points. The 10 Key parameters are explained here.
Data is provided each month to DWQR by Scottish Water. The chart is updated monthly, although there is a lag of a few months due to the time needed for analysis of samples and the transfer and processing of data.