Water conditioning contractors in Diamond Bar, CA
2 licenses with the C-55 classification list Diamond Bar (Los Angeles County) as their address with the state, 2 of them active. Active licenses with nothing flagged come first.
- Aquarena Water ConditioningC-55 · #1160847 Diamond Bar · Los Angeles County Active
- Avanti Membrane Technology IncC-55 · #1091779 Diamond Bar · Los Angeles County Active
Source: CSLB license file, Nov 8, 2026All trades in Diamond Bar