Most of Los Angeles County is on sewer — but the eastern foothill and canyon communities are not. Pomona, Claremont, La Verne, San Dimas, Glendora, Diamond Bar, Hacienda Heights, and the unincorporated hill areas still have thousands of working septic systems, many of them decades old.
LA County septic work runs through county Public Health and, for many properties, tighter regional water-board rules — paperwork that scares off casual operators. We have serviced eastern LA County from the Inland Empire side for generations: pumping, repairs, inspections, certifications, and full replacements where aging systems have reached the end. If your LA County property is on septic and you are tired of companies that will not drive past the county line, we make that drive regularly.
Areas We Cover
Services
- Septic pumping and maintenance
- Repairs: baffles, lids, lines, and leach fields
- Real-estate septic inspections and certifications
- System replacements with permits handled
- Grease interceptors and commercial service
Why Valley Drilling Co
Three generations of the same family since 1950. California C-42 licensed, bonded, and insured. Company-owned pump trucks, drill rigs, and excavation equipment — plus design and permits handled by us, with licensed-engineer stamps when required, so you make one call from plans to final inspection. A real person answers seven days a week, 8 AM to 8 PM.
Get a Free Estimate →Common questions answered on our Septic FAQ · About our company