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Top Septic System Repair Companies in Simi Valley, California Ranked
A failing septic system is more than an inconvenience; it's a serious environmental and public health concern for your Simi Valley property. Septic system repair involves diagnosing and fixing issues with your onsite wastewater treatment system (OWTS), from clogged drain fields to cracked tanks, ensuring it safely processes household waste. In Ventura County, this work is strictly regulated to protect local groundwater and soil. This guide will help you understand the local repair process, costs, and regulations, empowering you to find qualified professionals to restore your system to proper working order.

Advanced Sanitation - Septic Tank Pumping, Installation & Repair Ventura County
3379 Somis Rd Unit E, Somis, CA 93066
Advanced Sanitation - Septic Tank Pumping, Installation & Repair Ventura County provides septic system services in Los Angeles, CA, and surrounding areas including Ventura County and nearby cities. They offer septic tank pumping, installation, inspection, and repairs, as well as grease trap maintenance. The company uses modern equipment such as advanced camera technology for system inspections and works with registered geological engineers for septic system design and installation. With over 30 years of experience, Advanced Sanitation serves both residential and commercial clients and offers flexible hours to accommodate business schedules.

Sewer Man Septic Tank Pumping
16065 Foothill Blvd # B, Sylmar, CA 91342
Sewer Man Septic Tank Pumping provides septic tank pumping, cleaning, inspection, repair, and installation services in Los Angeles, CA. They use specialized equipment such as vacuum trucks and high-pressure water jets to maintain and clean septic systems, helping prevent backups and slow drainage. The company offers emergency septic pumping services for urgent needs and serves a wide range of nearby communities. Sewer Man Septic Tank Pumping is experienced in handling various septic system maintenance tasks to support property owners in the Los Angeles area.

Michael Penta Septic Tank Pumping
Los Angeles, CA
Michael Penta Septic Tank Pumping provides a range of septic services in Los Angeles, CA, including septic tank pumping, installation, inspection, and repair. The company also handles drain field repairs, sewage ejection pump services, and sewer line replacements. Their expertise includes advanced capabilities such as camera inspections for leaks and cracks, soil analysis for leach line repair, and installation of micro septic systems that treat wastewater to a higher quality. They ensure compliance with local regulations and offer comprehensive maintenance to extend the life of septic systems.

Conejo Bros Plumbing
1386 Del Verde Ct, Thousand Oaks, CA 91320
Conejo Bros Plumbing is a septic tank and plumbing service provider based in Oxnard, CA. They offer a wide range of services including septic tank inspection, pumping, repair, and replacement, as well as sewer mainline inspection and trenchless sewer and drain repair. Their capabilities include advanced trenchless pipe relining techniques that allow for pipe repairs without extensive digging, preserving property landscapes. Serving both residential and commercial clients throughout Ventura County and Conejo Valley, Conejo Bros Plumbing also provides 24/7 support for clearing blockages and other urgent plumbing needs.

The Drain Dude
13113 San Fernando Rd, Sylmar, CA 91342
The Drain Dude is a full-service plumbing company based in Los Angeles, CA, offering a wide range of plumbing solutions including septic tank inspection, septic system repair, and drain field repair or replacement. They provide 24/7 emergency plumbing services and use advanced technology such as video inspection and electronic leak detection to accurately diagnose issues. Their trenchless sewer and underground pipe installation services minimize disruption with low-dig or no-dig methods. The Drain Dude serves all of Southern California, combining family-owned values with professional expertise.
Understanding Septic System Failures and Repairs
A septic system is a complex, buried network that requires professional attention when problems arise. Common signs you may need septic tank repair or wastewater system servicing include:
- Slow-draining sinks, tubs, or toilets.
- Sewage backups in the home.
- Foul odors around the tank or drain field area.
- Unusually lush, green grass or soggy, wet spots over the leach field.
- Gurgling sounds in your plumbing.
Ignoring these signs can lead to groundwater contamination, property damage, and costly enforcement actions from the county. Repairs range from minor fixes to a full system replacement, depending on the age of the system and the nature of the failure 1.
Ventura County Regulations: Permits and Procedures
All significant septic system repairs in Simi Valley are overseen by the Ventura County Environmental Health Division (VCEHD). Understanding their requirements is the first step in any repair project.
When is a Permit Required?
Ventura County defines a "repair" as abandoning an old component and installing a new one in its place. Therefore, virtually any repair beyond simple maintenance-including replacing sewer lines, tanks, or any part of the disposal field-requires a permit from the VCEHD. Working without a permit can result in fines and an order to undo the work.
The Permit and Approval Process
- Initial Evaluation: If your system is over 15 years old or has no existing records on file with the county, a full evaluation by a qualified contractor is required. This typically includes a Septic Pumper's Report and may require a Soils Report 2.
- Design Submission: Your licensed contractor will submit a repair design, including the location and size of the new components, to the VCEHD for approval before any work begins.
- Final Inspection: Once repairs are completed but before the system is backfilled and buried, a VCEHD inspector must visit the site to approve the construction.
Working with Older, Non-Conforming Systems
Many older Simi Valley homes have systems (like cesspools) that don't meet current setback or sizing standards. These are often granted "non-conforming" status if they are not an immediate health threat. However, if a repair is needed, the new components must be built to current VCEHD codes. Furthermore, if you plan to expand your home (e.g., add a bedroom), it will likely trigger a requirement to upgrade the entire system to modern standards 3.
Types of Septic Repairs and Associated Costs
The cost of fixing your onsite wastewater system varies dramatically based on the problem's severity and the site's conditions. Below is a breakdown of common repair scenarios for Simi Valley homeowners.
Minor Repairs ($300 - $4,000)
These are typically issues isolated to components outside the main tank and field.
- Replacing Damaged Sewer Lines: The pipe running from your house to the tank can crack or clog. Repair costs range from $1,200 to $4,000.
- Fixing Structural Components: Repairing or replacing broken concrete tank lids, risers, or inlet/outlet baffles typically falls in the $300 to $900 range 4.
Drain Field (Leach Field) Repairs ($5,000 - $15,000+)
This is often the most expensive repair. If the soil in the leach field becomes clogged (a condition called "biomat" buildup), it can no longer absorb liquid. Solutions include:
- Replacing Leach Lines: Excavating and installing new perforated pipes in the field.
- Adding a Replacement Field: In many cases, especially if the original field fails, Ventura County may require a 100% expansion area-a completely new, backup leach field-to be installed 5.
- Trenchless Options: For certain pipe issues, some local contractors offer trenchless sewer relining, which can repair pipes without major excavation, potentially saving on landscape restoration costs 6.
Tank Replacement ($9,500 - $15,000)
If the septic tank itself has major structural cracks, is leaking, or has collapsed, it must be abandoned and replaced. This is a major excavation project that always requires a county permit and inspection.
Diagnostic and Ancillary Costs
- Professional Inspection/Diagnosis: $200 - $900. A thorough inspection is necessary to accurately diagnose any problem 7.
- Pumping: $350 - $1,000. The tank must be pumped to allow for a proper internal inspection before repairs can be quoted or begun 8 9.
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The Professional Repair Process: What to Expect
Hiring a qualified professional ensures the repair is done correctly and passes county inspection. Here's a typical workflow:
- Initial Site Survey: The contractor will locate your tank and drain field and look for surface evidence of failure 10.
- Excavation and Exposure: The tank is carefully uncovered to allow full access.
- Pumping and Internal Inspection: After pumping, the contractor inspects the tank's interior for cracks, baffle integrity, and water tightness 11.
- Advanced Diagnostics: To pinpoint drain field issues, a camera may be sent through the lines, or a hydraulic load test may be performed by running water through the system to check for proper drainage.
- Repair Execution: The contractor performs the approved repair, whether it's replacing a pipe, installing a new tank, or constructing a new leach field.
- Final County Inspection: The VCEHD inspector reviews the work. Only after their approval can the system be backfilled 12.
Choosing a Licensed Contractor in Simi Valley
This is not a DIY project. Ventura County requires that septic system construction and repair be performed by appropriately licensed professionals. Look for contractors holding one of the following state licenses:
- "C-32" (Sanitation Systems): This is the specialty license for septic system contractors.
- "C-36" (Plumbing): Licensed plumbers can also perform certain repairs.
- "A" (Engineering): For complex system designs 13 14.
Always verify the contractor's license is active and in good standing with the California Contractors State License Board (CSLB). They should also be familiar with Ventura County's specific permit process and forms.
Resources for Simi Valley Homeowners
- Ventura County Environmental Health Division (VCEHD): The primary regulatory body. Main Office: (805) 654-2813.
- Online Record Search: You can search for existing records of your property's septic system through the county's ISDS (Individual Sewage Disposal System) portal: https://vcrma.org/isds-record-search 15.
- Key County Documents: Review the "Onsite Wastewater Treatment System FAQs" and related guides on the VCEHD website to understand your responsibilities as a homeowner 16.
Frequently asked questions
Sources
Footnotes
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Septic Systems / Wastewater Disposal - https://rma.venturacounty.gov/divisions/environmental-health/septic-systems-wastewater-disposal/ ↩
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Certify Your Existing OWTS - https://rma.venturacounty.gov/divisions/environmental-health/certify-your-existing-onsite-wastewater-treatment-systems/ ↩
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VENTURA COUNTY ENVIRONMENTAL HEALTH DIVISION LOCAL AGENCY MANAGEMENT PROGRAM FOR ONSITE WASTEWATER TREATMENT SYSTEMS - https://www.waterboards.ca.gov/losangeles/board_decisions/tentative_orders/other_resolutions/Ventura_County/RevisedLAMP5.0Complete2272018.pdf ↩
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Common Septic Tank Repairs In California (& What They Cost) - https://cacciaplumbing.com/blog/common-septic-tank-repairs-in-california/ ↩
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private sewage disposal systems - https://www.waterboards.ca.gov/water_issues/programs/owts/docs/appdxk_ch7ta1401.pdf ↩
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Top Hat Sewer Relining services in Simi Valley, CA - https://www.americandraincompany.com/plumbing-services/top-hat-sewer-relining/ ↩
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How Much Does a Septic Inspection Cost? [2026 Data] - Angie's List - https://www.angi.com/articles/septic-inspection-cost.htm ↩
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How Much Does Septic System Repair Really Cost in California - https://www.lanikseptic.com/septic-repair-cost/ ↩
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Point of Sale Septic Inspections: What to Expect - https://westcoastsanitationinc.com/point-of-sale-septic-inspections-what-to-expect/ ↩
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Understanding Septic Tank Inspections: A Complete Homeowner's ... - https://septic-masters.com/septic-tank-inspection-homeowner-guide/ ↩
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Septic Inspection Process: What Homeowners Should Know ... - https://www.lunspro.com/vlog/the-septic-system-inspection-process-what-homeowners-should-know ↩
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Understanding Septic Tank Inspections: A Complete Homeowner's Guide to the Process - https://septic-masters.com/septic-tank-inspection-homeowner-guide/ ↩
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OWTS Construction and Repair - https://rma.venturacounty.gov/divisions/environmental-health/onsite-wastewater-treatment-system-construction-and-repair/ ↩
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onsite-wastewater-treatment-system-requirements-procedures. ... - http://www.publichealth.lacounty.gov/eh/docs/permit/onsite-wastewater-treatment-system-requirements-procedures.pdf ↩
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FAQ: SEPTIC SYSTEMS AND FIRE REBUILDS - https://rma.venturacounty.gov/wp-content/uploads/2024/05/frequently-asked-questions-septic-systems-and-fire-rebuilds.pdf ↩
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Onsite Wastewater Treatment System FAQ's - https://rma.venturacounty.gov/divisions/environmental-health/onsite-wastewater-treatment-system-faqs/ ↩