Keep in mind that if you have used water treatment it will convert the ammonia to ammonium which is not harmful but will still read in your test. With my new tank I was reading at 0.25 -.50 ppm for the first few weeks and once it was fully cycled (about week 6) it finally balanced to 0.
Im not a fishy expert by any means but spent a LOT of time stressing over it when it wasn't warranted.
If it's a new tank or you have recently tipped the balance of a cycled tank with an extreme water change etc and are treating your water properly from my experience it should be OK.
Again, not an expert but those were my findings. :)