How plumber licensing works across every US state, Washington DC and the territories — licensing authorities, licence types, fees, reciprocity, continuing education and the official sources to verify against.
| Jurisdiction | Statewide licensing | Reciprocity | Continuing education | Guide |
|---|---|---|---|---|
| California | Yes | Interstate | No | Guide available |
| Texas | Yes | Interstate | Yes | Guide available |
| Washington, DC | — | — | — | Coming soon |
| Wyoming | No (local/municipal) | Intra-state | Varies | Guide available |