On 5 May 2022, the Norwegian Food Safety Authority released the National Drinking Water Report 2021.  From January 1 to December 31, 2021, the Norwegian Food Safety Authority inspected the water supply pools at 566 waterworks.  It was checked that whether the waterworks owner had conducted a hazard survey of the water supply pool or not, whether procedures for monitoring and maintaining the water supply pool had been done or not, whether the water supply pool was provided with satisfactory physical protection against unauthorized access or not.  A total of 390 of 1,013 controlled water systems were found to be defective, or more than 38%.  The inspection found the most problems with hazard investigations and monitoring and maintenance procedures for supply pools.