In the United States, legal restrictions and permit requirements for building a pond can vary depending on local, state, and federal regulations.
It is essential to research and comply with the specific rules in your area. Some jurisdictions may have restrictions on the size, depth, or location of ponds.
Additionally, permits may be necessary if the pond involves dam construction, affects wetlands or waterways, or involves the diversion of water sources.
Contact your local government or relevant environmental agencies to inquire about any applicable regulations, permits, or approvals needed before constructing a pond.