Verified licenseActive

MC Lean & Williams Inc

Napa, CA · Napa County · Well drilling and pump installation

  • Pump Installation
  • Pump Repair
  • Well Abandonment
  • Well Drilling
  • Well Repair
Call (707) 255-6450Website

License record

Verified against state records
License number
396352
License type
Well drilling and pump installation
Status
Active
Expires
December 31, 2026
Last verified
September 29, 2026

Check this license yourself on the official California lookup.

Services on the state record

Holds an active California C-57 Well Drilling contractor license (CSLB license 396352, corporation, first issued 1980, current through 2026-12-31). The C-57 classification covers drilling, casing, cleaning, repairing and destroying water wells and installing and repairing well pumps. Filed 242 well completion reports with the Department of Water Resources since 2016 (126 new wells, 166 of them domestic supply; 116 well destructions), most recently in July 2026, mostly in Napa and Sonoma counties.

Service area

  • Napa County
  • Sonoma County

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