There is no documentation that I have found anywhere that explains how to use the Navigate LA website. The best way to learn how to use it is to speak to a city engineer because they use it every day. Navigate LA will show you whether a property is Septic or city sewer.
Accept the disclaimer and type in the property address you want to find out about. A Plat Map with the parcel will load. To find out information about the sewer, you will need to switch from the default layers to “Infrastructure – Sewer Information”