10 verified septic companies across 5 cities in Lewis County. Compare ratings, services, and request free quotes from local providers.
Lewis County, Washington is home to a wide range of residential and rural properties spread across river valleys, forested foothills, and small communities along the Interstate 5 corridor. This directory lists 10 verified septic service companies covering 5 cities and towns throughout the county. Because much of Lewis County lies outside municipal sewer systems, on-site septic is the primary wastewater solution for a large share of households, from rural acreages near the Chehalis River floodplain to hillside properties in the Cascades foothills. The county's wet winters and clay-heavy soils in certain areas can place added stress on drain fields and septic components, making routine maintenance particularly important. Whether you own a older farmhouse, a newer subdivision home, or a rural recreational property, the companies listed here provide pumping, inspection, repair, and installation services across Lewis County.
Chehalis, WA
⭐ 5.0 (23 reviews)
Tibbits Excavating is a family-owned and operated business based in Chehalis, Washington, proudly serving Lewis and neighboring counties. With over 20 years of excavating experience, they offer a wide range of heavy equipment services to help clients achieve their property visions. The company is dedicated to providing quality results that surpass expectations at a reasonable price. Tibbits Excavating has been recognized as the "Best Excavation & Land Clearing Company" in The Chronicle's "Best of Lewis County" for both 2023 and 2024, and in KMNT's "Listeners Choice Awards" for 2025. They are committed to helping customers "Discover Your Property's Potential" and now offer financing options. While they welcome inquiries outside of business hours, their standard operating hours are Monday through Friday, 7:30 AM to 5:00 PM.
Toledo, WA
⭐ 4.9 (83 reviews)
Rainier Plumbing is a trusted plumbing company serving Olympia, WA and Toledo, WA with over 10 years of industry experience and a strong 5-star reputation on Google. The company offers a range of residential plumbing services including whole home repiping, water heater replacement, faucet repair, and plumbing leak repair. Rainier Plumbing sets itself apart by providing same-day service in most cases, clear and honest communication, and a customer-first approach focused on educating homeowners rather than pressuring them into unnecessary work. With a commitment to transparency and reliable craftsmanship, the team works hard to make the plumbing process straightforward and stress-free. Customers consistently praise Rainier Plumbing for prompt response times, professional service, and dependable results. Whether handling routine repairs or urgent plumbing issues, Rainier Plumbing brings the expertise and responsiveness that homeowners in the Olympia and Toledo areas can count on.
Salkum, WA
⭐ 4.9 (75 reviews)
Washington Septic Services LLC is a septic service provider based in Salkum, Washington, serving the local community with septic system solutions. The company has established a strong reputation, reflected in its impressive 4.9 Google rating across 75 customer reviews. With a focus on reliable service and customer satisfaction, Washington Septic Services LLC addresses the septic maintenance and repair needs of residential and commercial clients in the region. Their consistent positive feedback demonstrates their commitment to quality workmanship and professional service in the septic industry.
Toledo, WA
⭐ 4.8 (22 reviews)
Sasquatch Septic is a family-owned and operated septic service company proudly serving residential and commercial properties throughout Lewis and Cowlitz Counties, Washington. The company offers a comprehensive range of septic solutions, including septic pumping, septic tank cleaning, septic diagnostics, septic inspections, septic repair, and dedicated commercial septic services. As a licensed, bonded, and insured business, Sasquatch Septic utilizes advanced technology to deliver accurate diagnostics and effective results on every job. New customers receive free diagnostic services, and free quotes are available for unexpected emergencies, reflecting the company's commitment to transparency and community-focused service. Whether handling routine maintenance or urgent repairs, their skilled team is equipped to manage both simple and complex septic systems with minimal disruption. Sasquatch Septic stands behind every service provided, making them a trusted choice for dependable wastewater management in the region. To schedule an appointment or request a free quote, customers can reach Sasquatch Septic by phone at (360) 200-0964 or through their online contact form.
Centralia, WA
⭐ 4.3 (111 reviews)
Centralia, WA
⭐ 3.9 (7 reviews)
Goode and Associates is a land-use consulting firm specializing in septic system design, serving Southwest Washington since 2002. Jeannie Yackley, a Licensed Designer since 2002, leads the company, bringing extensive experience from her background as an Environmental Health Specialist. Goode and Associates focuses on providing cost-effective and long-lasting septic systems for both new construction and repairs. They offer feasibility studies for vacant land to evaluate site suitability and determine minimum required septic system types, helping clients understand potential costs and limitations before investment. For existing homes, they provide evaluations of county records and site inspections to ensure proper function and permitting of septic systems. Goode and Associates utilizes Computer Aided Drafting and works with local installers to see projects through to completion, guiding customers through design decisions and the permit process.
Chehalis, WA
Chehalis, WA
Napavine, WA
Napavine, WA
Lewis County has a notably rural character, with many properties relying on septic systems installed decades ago when the region was developed for timber, farming, and small-town residential use. Older gravity-fed systems remain common on flat or gently sloping lots, while pump-up systems and pressure-dosed designs are frequently found on properties with limited soil depth or high seasonal water tables, a condition that occurs in parts of the Chehalis Valley during winter months. Alternative systems, including mound systems and drip-irrigation designs, are increasingly required on lots where conventional drain fields cannot meet current Washington State standards. Homeowners in Lewis County should be aware that the region's heavy annual rainfall can saturate drain fields faster than in drier parts of the state, making fall inspections and timely pumping a practical precaution before the wet season begins.
Septic system permits and oversight in Lewis County fall under the Lewis County Public Health and Social Services department, which administers on-site sewage regulations in alignment with Washington State Department of Health guidelines, specifically the rules established under WAC 246-272A for on-site sewage systems. A permit is generally required for new installations, repairs, and certain modifications. When a property with a septic system is sold, Washington State encourages inspection as part of the transaction, and some lenders or local jurisdictions may require it. Homeowners can research applicable rules and permit requirements through the Lewis County Public Health office or the Washington State Department of Health's on-site sewage program resources. Permit requirements, inspection standards, and approved system types can change over time. Always verify current requirements with your local health department.
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