The Civil Defence test alerts this morning were successful despite delays in receiving text messages, the organisation says.
Text alerts, the Red Cross hazard app and Facebook were some of the alerting tools put to the test by Civil Defence this morning as part of a Bay of Plenty wide check.
Vehicle mounted sirens were also tested in specific areas and fixed sirens in the Eastern Bay.
Director of emergency management Bay of Plenty Clinton Naude said overall the test went well.
"When there is sufficient time to qualify information about a natural hazard, tools like our text alerts are very effective at letting subscribers know if there is a significant emergency in the region and what to do.