PWTAG Technical notes are updates or new material for the standards and guidance given in the PWTG book, Swimming Pool Water and the PWTAG Code of practice and should be read in association with these publications.
- Subject: How the authorities investigate outbreaks
- Date: November 2013
Information on this can be found in chapter 13 of Swimming Pool Water, based on what was used by the Health Protection Agency (now Health Protection England).