Napier Aquatic Centre has stepped up security after staff and visitors were left feeling "unsafe" due to incidents of verbal abuse.
Mitai Security guards have been introduced at the centre, on Maadi Rd, Onekawa, to support lifeguards in keeping customers safe.
A Napier Aquatic Centre spokeswoman said the support takes the form of proactively managing communication with customers and heading off any potential issues before they arise.
"The behaviour of some customers in recent years, particularly during the summer period when we are extra busy, has at times made both staff and visitors feel unsafe," she said.