Hi Hammerdown 502
Your REALTOR should be able to provide you with your tax rate. Be careful not to get caught up in semantics. Though it is true that Eastvale is not set up as a Mello Roos District, much of the area is subject to "Special Assessments". These assessments are substantial in some neighborhoods and and nominal in others. But as I said, your REALTOR has access to Real List tax Data and will be able to provide you with the information that you are requesting.
And, even though Mello Roos fees are technically not the same, they have one important thing in common, and that is that they can add substancially to your home operating expenses.