Chicagoland lake Michigan water

[Whaledriver]

I got a water quality report with the water bill and was wondering about the Nitrate level. It says it is "nitrate(as nitrogen)(ppm) = .357 The nitrate & nitrite is at the same number.
What does this mean? I just age my water for a few days with an airstone. Should I be worried?

[Douglas LEHMAN]

Hello
Is the water used for a reef type set up?
I would be worried about the PO4 level myself.
I routinely get PO4 levels above 1 ppm out of the tap.
If it's fish only then it's not much of a factor either way.