10 verified septic companies across 4 cities in Thurston County. Compare ratings, services, and request free quotes from local providers.
Thurston County, Washington is home to 10 verified septic service companies listed across 4 cities and towns in our directory. As the county seat and state capital region, Thurston County spans a mix of urban development in Olympia, growing suburbs in Tumwater, and more rural landscapes to the west and south toward Rochester. Much of the county sits within the South Puget Sound lowlands, where wet winters and clay-heavy or glacially deposited soils can affect how septic systems drain and perform. Thurston County Environmental Health oversees on-site sewage systems for properties outside municipal sewer service areas, and a significant share of residential properties — particularly in unincorporated areas — rely on private septic systems. Whether a homeowner needs routine tank pumping, a pre-sale inspection, or a repair after heavy seasonal rains, the companies listed here serve communities throughout the county.
Olympia, WA
⭐ 4.9 (1091 reviews)
Howdys Doody Service, Inc. is a septic and portable sanitation company serving Olympia and the surrounding areas of Thurston, Pierce, Mason, Lewis, and Grays Harbor counties in Washington. In business since 2014 and backed by more than 60 years of combined team experience, they offer a comprehensive range of services including septic tank pumping, septic system installation, maintenance, repairs, and inspections, as well as drain field installation and repair. The company also provides portable toilet rentals, hand wash stations, holding tanks, RV pumping, and their signature Howdys Huts. Same-day and emergency services are available, and they offer competitive pricing with discounts for military personnel and seniors. Homeowners, businesses, and job site managers throughout the region rely on Howdys Doody Service for dependable, knowledgeable service from a locally rooted team. To schedule service or request a quote, contact them directly at (360) 584-9936 or through their website.
Yelm, WA
⭐ 5.0 (538 reviews)
Premier Septic Services LLC is a family-owned and operated septic company serving Pierce and Thurston counties from their base in Yelm, Washington. With over 29 years of industry experience, the company provides comprehensive septic solutions including pumping, inspections, repairs, and drain cleaning for residential and commercial systems. The team holds O&M Level 2 Specialist and Monitoring Specialist certifications, maintaining full licensure in each county served. Owners Clarence and Amy Fladager prioritize ongoing education to stay current with industry standards and regulations. Premier Septic Services distinguishes itself through transparent pricing, honest diagnostics, and a commitment to avoiding unnecessary upsells. The company emphasizes fair, competitive rates and straightforward service delivery rather than high-pressure sales tactics. Operating for over 40 years as community members, they focus on building lasting client relationships and earning referrals through reliable, specialized septic services.
Olympia, WA
⭐ 5.0 (3 reviews)
Olympia, WA
⭐ 5.0 (3 reviews)
Bay Shore Construction has been serving residential and commercial customers across Thurston, Mason, Pierce, Lewis, Grays Harbor, and Pacific Counties since 1989. Specializing in septic systems, sewer, and water services, the company offers septic design, septic installation, drainage systems, waterline excavation, underground utilities, pneumatic boring, community water systems, city water and sewer hook-ups, demolition, and inspection and repair services. Bay Shore Construction also handles utility trenching, retaining walls, driveway and road building, property clearing, and final grading. The team uses modern technologies to ensure all work meets or exceeds industry standards, and flexible financing options are available for qualified customers. With decades of experience and a strong track record of customer satisfaction, Bay Shore Construction is a trusted choice for septic and construction needs in the greater Olympia, Washington area. Customers can reach the team by phone at (360) 866-9200 or by email at [email protected].
Tumwater, WA
⭐ 5.0 (1 reviews)
Grade Pros LLC is a septic and sewer installation company serving Mason and Thurston County in Washington State, based out of Rainier, WA. The company specializes in septic and sewer system installation, offering free estimates to prospective clients. Grade Pros LLC emphasizes a culture of character and accountability, streamlined processes designed to meet sensitive project timelines, and competitive pricing. The team is committed to professional service delivery and open communication throughout every project. In addition to their core installation services, Grade Pros LLC maintains a network of trusted preferred contractors for related trades including septic pumping, logging, electrical, plumbing, landscaping, and concrete work, making them a well-connected resource for property owners navigating full-site development or system replacement projects. Homeowners and contractors in the Mason and Thurston County area can reach Grade Pros LLC by phone at 360-280-3150 or by email to request a quote and discuss project needs.
Olympia, WA
⭐ 4.6 (745 reviews)
When you need stellar home services in Olympia, WA and the surrounding area, call on the team of A+ Services. Call to request plumbing, HVAC, and more!
Rochester, WA
⭐ 4.5 (60 reviews)
Olympia, WA
⭐ 3.6 (23 reviews)
Olympia, WA
⭐ 3.6 (18 reviews)
Gunstone Septic Cleaning is a professional liquid waste management company serving Olympia and Thurston County, Washington. The company offers a comprehensive range of septic services, including septic tank pumping, system maintenance, repair, and cleaning, making it a one-stop source for residential and commercial septic needs. In addition to septic services, Gunstone Septic Cleaning provides portable toilet rentals for events and job sites. The team is committed to keeping drains, lines, and sewer systems clean and in compliance with local regulations. Gunstone Septic Cleaning prides itself on delivering quality workmanship at competitive rates, with customer satisfaction as a top priority. Whether clients need routine maintenance or a full system replacement, the company works to complete every job correctly and on schedule. Gunstone Septic Cleaning is located at 3410 Sapp Rd SW, Olympia, WA 98512, and can be reached by phone at 360-352-9922. Business hours are Monday through Friday, 8 a.m. to 6 p.m.
Olympia, WA
⭐ 1.0 (2 reviews)
Thurston County's septic landscape reflects its varied development patterns. Older homes in and around Olympia may have aging conventional gravity-fed systems installed decades ago, while newer construction in suburban areas sometimes incorporates pressure-distribution or pump-up systems to accommodate less permeable soils. In rural parts of the county, including areas near Rochester and unincorporated townships, larger lot sizes often support traditional drainfields, though the region's high seasonal water table during Pacific Northwest winters can stress drainfield performance. Alternative systems, such as mound systems or drip-irrigation designs, are used where soil conditions or lot size make conventional installation impractical. Homeowners should be aware that the wet season — roughly October through April — can saturate soils and reduce the margin for drainfield absorption, making fall pump-outs a common preventive measure.
Septic system permits and oversight in Thurston County fall under Thurston County Environmental Health, the local agency responsible for administering Washington State's on-site sewage regulations. Any new septic installation, major repair, or system alteration generally requires a permit and inspection from that office before work is covered or the system is placed back into service. Washington State also has statewide rules governing on-site sewage systems, and Thurston County's program operates in alignment with those standards. For real estate transactions, a septic inspection or system evaluation is commonly required or strongly recommended, and the county may have specific documentation requirements for point-of-sale transfers. Homeowners can research permit applications, system records, and local ordinances through Thurston County Environmental Health's public resources. Always verify current requirements with your local health department.
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