Verified license

Tri-County Drilling Inc

San Diego, CA · San Diego CountyWell drilling and pump installation

Call (858) 271-0099
WebsiteDirections
License status
Active
checked September 29, 2026
License number
547737
California record
Services
5
Pump Installation and more
Counties served
5
on the state record

About Tri-County Drilling Inc

Tri-County Drilling Inc is a well drilling and pump installation contractor based in San Diego, CA (San Diego County). The California licensing program lists license 547737 as active, and we last checked the record on September 29, 2026.

The state record covers pump installation, pump repair, well abandonment, well drilling and well repair. It lists 5 counties where the business works, including San Diego County, Los Angeles County and Riverside County.

This profile is built from public state license records checked on September 29, 2026. Well Water Insider does not rate or endorse contractors. Own this business? Claim the profile to add photos, hours and a description.

License record

Verified against state records
License number
547737
License type
Well drilling and pump installation
Status
Active
Expires
November 30, 2026
Last verified
September 29, 2026

Check this license yourself on the official California lookup.

What the state record says

Holds an active California C-57 Well Drilling contractor license (CSLB license 547737, corporation, first issued 1988, current through 2026-11-30). The C-57 classification covers drilling, casing, cleaning, repairing and destroying water wells and installing and repairing well pumps. Filed 64 well completion reports with the Department of Water Resources since 2016 (24 new wells, 2 of them domestic supply; 40 well destructions), most recently in August 2025, mostly in San Diego, Los Angeles and Riverside counties.

Services

What the California record says Tri-County Drilling Inc is licensed or registered to do.

Pump Installation

Setting a new submersible or jet pump with the pressure tank, switch and controls.

Pump Repair

Tracking down low pressure, short cycling or no water, then repairing or replacing parts of the pump system.

Well Abandonment

Sealing an unused well to state standards so it cannot carry surface water down into the aquifer.

Well Drilling

Drilling a new private well, setting the casing and grouting it the way state rules require.

Well Repair

Fixing casings, caps, pitless adapters and other parts of an existing well.

Service area

Based in San Diego County, California. The state record lists 5 counties.

Approximate location (San Diego County)Counties on the state record

  • San Diego County
  • Los Angeles County
  • Riverside County
  • San Bernardino County
  • Orange County

Well water in San Diego County

Useful context before you call a contractor here.

2%of households in San Diego County drink from a private well (est.)
330 to 810 feet; the median of 1,915 domestic wells reported to DWR since 2000 is 540 feettypical private well depth
Not statewidewater test when a home with a well is sold: no statewide rule in California, but some local areas require one
Open the San Diego County well guide

Typical costs for these services

National ranges to help you read a quote. They are not prices from Tri-County Drilling Inc; ask for a written estimate.

Submersible pump replacement$1,000 to $2,500installed; deep wells cost more
Pressure tank replacement$800 to $1,500installed
New well, complete$6,000 to $16,000typical 200 ft well with pump; drilling alone about $20 to $30 per foot; deeper wells cost more
Shock chlorination$80 to $200by a contractor; under $30 to do yourself

National 2026 ranges. Sources, checked September 2026: HomeGuide cost guides, Angi.

Certified labs nearby

Test your water before and after any work on the well.

San Diego County Public Health LaboratorySan Diego, CA · 3.6 miEMSL Analytical, Inc.San Diego, CA · 4.1 miAnalytical Environmental Lab, LLCSan Diego, CA · 4.3 mi
All labs near here

Before you hire

  1. 1

    Confirm the license

    Look up license 547737 on the California state lookup and make sure it is active for the work you need. Open the California lookup.

  2. 2

    Get a written estimate

    Ask for the scope, parts, depth or pump size, permit fees and warranty in writing. Compare two or three quotes for big jobs.

  3. 3

    Ask about permits and the well log

    New wells and many repairs are reported to the state. Ask who files the paperwork and for a copy of the well log.

  4. 4

    Test the water after the work

    Any work on a well can disturb bacteria. Test for coliform bacteria once the job is done.

Questions about Tri-County Drilling Inc

Is Tri-County Drilling Inc licensed?

Yes. The California record shows license 547737 (well drilling and pump installation) with the status "active", last checked on September 29, 2026. You can confirm it on the state lookup.

What services does Tri-County Drilling Inc offer?

The state record lists pump installation, pump repair, well abandonment, well drilling and well repair. Call to confirm they take on your type of job.

What areas does Tri-County Drilling Inc serve?

The business is based in San Diego County (San Diego, CA). The state record lists 5 counties, including San Diego County, Los Angeles County, Riverside County, San Bernardino County and Orange County.

How do I contact Tri-County Drilling Inc?

Call (858) 271-0099 and visit their website. The address on the state record is 9921 Carmel MTN Rd #139, San Diego, CA 92129.

Other licensed contractors near San Diego