In terms of the inventory in the United States, some utilities have very good records, in which case they are in good shape. The vast majority of the utilities, however, have extremely poor records, so we're left with going into the basements of consumers' homes to see what pipe material is entering the homes. We're also left with digging holes, either with excavators or something called hydro-excavation, whereby we dig down a narrow hole and check out what the pipe material is. That's unfortunately how we'll have to do it—house by house.
Let me very quickly respond that in the States, we find that point-of-use filters are a very good cost-effective interim measure to deal with the lead problem. These filters are only $30 each. They're the same filters you'd buy at Lowe's or Home Depot. As long as they're NSF-certified to remove lead, they will effectively get lead down to low levels only for the water used for cooking or drinking, which is of course where the health threat comes from. Our experience is that point-of-use filters are a very cost-effective measure in some cases.