| LSU - Lead Service Unknown, Suspected Lead |
| Tier 1 - Single Family Structure Served by Lead |
| Tier 2 - Multi Family Residence or Building Served by Lead |
| Tier 3 - Single Family Structure Served by a Galvanized Steel Line Known to be or Have Been Downstream of Lead |
| Tier 4 - Single Family Structure with Copper Pipes with Lead Solder Installed Before 1988 |
| Tier 5 - Not Lead |
| No Service |