Disinfecting water storage tanks

December 2015

The information on the document below will help you disinfect water storage tanks if you suspect that some water contamination has occurred. The recommended disinfectant is plain (not scented), liquid (not gel) bleach which should have 5% Sodium Hypochlorite written on the label somewhere.

Janola, one of the most well-known bleach brands, shouldn't be used. Manufacturer Pental Products states all Janola liquid bleaches contain surfactants and aren't suitable for treating drinking water tanks. Read more below.

 Disinfecting water storage tanks (PDF, 15KB)

In the event of an earthquake, drop, cover and hold and stay in the building

10 June 2015

The Ministry of Civil Defence & Emergency Management (MCDEM) has published updated advice about how to prepare for earthquakes, says Civil Defence Minister Nikki Kaye.

“The updated advice clarifies what to do before, during and after the shaking stops, and is set out in the earthquake chapter of the reference guide that provides agreed messages for all agencies involved in civil defence emergency management,” says Ms Kaye.

“Although it’s relevant to everyone, the updated advice will be of particular interest to building owners, workplace safety wardens and staff responsible for emergency plans.

“The updated messages are based on lessons identified following recent earthquakes, as well as increased scientific knowledge in this area.

Drop, cover and hold is reinforced as the right action to take in an earthquake. It’s also important to stay indoors until the shaking stops, and you’re sure it’s safe to exit.

“Often people’s instinctive reaction is to run from the building. However, research shows that people moving as little as three metres during an earthquake are more likely to be injured by flying furniture, fixtures or debris."


Changes to Pacific Tsunami Warning Centre messages

13 October 2014

The Pacific Tsunami Warning Centre (PTWC) provides information on all earthquakes in the Pacific to national tsunami warning centres (in New Zealand this is the Ministry of Civil Defence & Emergency Management). From today the PTWC will be issuing new, enhanced tsunami messages to the warning centres. It is important to note that in the event of a tsunami threat, advice of this will come from the Ministry of Civil Defence & Emergency Management.

John Hamilton, Director of Civil Defence & Emergency Management, said the Ministry also wished to remind the public that an official warning was only possible for distant (more than three hours warning time) and regional source (one to three hours warning time) tsunamis. “For a tsunami generated very close to New Zealand there simply won’t be time for an official warning,” he said. “It is therefore important to prepare before a tsunami and be able to recognise the natural warning signs so you can act quickly.”

For more about recognising the signs of a tsunami, read the full press release on the NZ Civil Defence website. ​

Page reviewed: 26 Jul 2018 11:15am