All-Clad's website says this:
Today, from its rolling mill in Southwest Pennsylvania, All-Clad Metalcrafters is the only bonded cookware manufacturer who utilizes American craftsmen and American-made metals to produce a complete line of finished bonded cookware products...
It also says this:
. Is All-Clad made in the USA?
There are areas in which All-Clad does not manufacture in the USA. These are:
1. Where the bonding of metals is not required for superior cooking performance (E.g. tools, accessories)
2. On regular non-bonded components where making in the USA would add to the retail price but not generally to performance (E.g. lids)
3. Where manufacturing constraints exist at the Canonsburg plant (E.g electrical kitchen appliances)
All-Clad’s tools, accessories, lids or electrical kitchen appliances, are manufactured by select partners overseas qualified carefully by All-Clad with highest quality specifications.
All-Clad Metalcrafters LLC has a strict policy of selecting and working with reputable and responsible suppliers that strive to consistently manufacture materials, components and products worthy of the All-Clad brand name, in addition to being in total compliance with applicable environmental and product composition standards.
All-Clad items manufactured overseas are subjected to, not only, strict U.S. Food & Drug Administration testing; but also stringent third party testing to ensure products are free of lead or any other contaminations. All-Clad maintains its policy of providing consumers with safe, high-quality products that are backed by a lifetime warranty.