I actually contacted my utilities company for a recent water quality report (I was interested in potassium and iron). They sent me one showing a pH of 7.5 and much softer than expected. Iíve never gotten a reading on any tap water in my state lower than 8, and although I only recently got a KH and GH test kit, the Calcium and Magnesium levels at least looked much lower than expected for this area. They must test on ďgoodĒ days
Your utility is probably getting water from multiple sources in its service territory. And there can be significant differences in water chemistry from well to well. The numbers they gave you were probably average numbers from all their wells. You might be close to one of the wells that produces harder than average water. Can you provide a link to the entire water report. there might be something else helpful in it.
Was your home constructed recently? Many micro fertilizers have very low levels of copper and zinc due to these metals leaching off of the metal pipes the water flows through. However in newer construction plastic pipes are commonly used. And some utilities are now also using plastic pipes to deliver the water. At least one person did report better plant growth by adding zinc to his CSM+B micro fertilizer. The water report you got should have some information on lead and copper.
My phosphate is always high now that Iím dosing EI. Typically from 2-10ppm, right now itís at 5.
I would try lowering this by adding less phosphate.