Testing of harbour waters in July 2008, with two of the three sewage treatment plants on-line, indicated that they are safe for swimming. Municipal public beaches at Black Rock Beach in Point Pleasant Park and at the Dingle Beach in Sir Sandford Fleming Park were officially re-opened on Saturday, August 2, 2008 (Natal Day weekend) after a 30-year closure due to sewage contamination in the water. Lifeguards are now providing supervision during regular hours through to Labour Day weekend. However repeated breakdowns in the new system have resulted in swimming bans being regularly re-imposed and periodic resumption of raw sewage discharge. From early 2009 on swimming was no longer allowed in the harbour because the plant flooded and stopped working. On the weekend of July 4, 2010 some beaches (like Black Rock Beach) reopened.