EMA is a quality utility. Much like all other utilities, it's really struggling in a high policy rate environment.
I'm not exactly sure why you hold the company, if it's for the dividend, the overall growth etc, so I can't really comment on whether or not you should buy more.
The dividend is safe, and I'd expect the company can return to mid single digit earnings growth once policy rates continue to decline.
The company isn't going to provide any sort of eye-popping returns, but I'd expect consistency. A solid holding for many retirement portfolis.