Start with the Cause
Separate a plumbing, tank, pump or field problem.
Olympia Septic Services | Septic Tank & Drain Field Services
Olympia Septic Services is the #1 septic in Olympia, WA. We handle septic tank pumping, septic tank cleaning, septic tank inspections, septic tank repairs, septic tank installation or replacement, and drain field services. Servicing the greater Olympia area.
We have over 22 years of experience handling installation, oversight, and business development. It's important to start with the cause, then choose the right service. Thurston County soils, seasonal groundwater and your approved system design guide the work.
Residential & CommercialTank & Drain Field ServicesClear Starting Prices
Why Choose Olympia Septic Services?
Know the Local System
Gravity and treatment systems need different care.
Keep the Scope Clear
Confirm access, diagnosis, disposal and restoration.
Plan Around the Parcel
Use records, bedrooms, soil and groundwater.
Compare Sensible Options
Understand repair before deciding on replacement.
Keep Useful Records
Save reports, pump-out dates and the approved drawing.
Septic Services in Olympia, WA
Start with the service that matches your need. If you are unsure, describe the symptoms.
Septic Tank Services
Routine care, a recurring backup or a new system: each starts with a clear scope and the property’s actual needs.
Septic Tank Pumping
Remove built-up waste. Confirm tank capacity, lid access and the last service date.
Explore Septic ServiceSeptic Tank Cleaning
Remove residue after pumping. Ask whether wash-down and deeper cleaning are included.
Explore Septic ServiceSeptic Tank Inspection
Check accessible components, records and symptoms before buying, maintaining or repairing a system.
Explore Septic ServiceSeptic Tank Repair
Assess lids, baffles, filters, connections and pumps before deciding whether replacement is needed.
Explore Septic ServiceSeptic Tank Installation & Replacement
Choose the tank, treatment and field as one approved design. Check soils, seasonal groundwater and sewer availability first.
Explore Septic ServiceEmergency Septic Pumping
Describe the backup and request urgent service. Availability is confirmed separately.
Explore Septic ServiceDrain Field Services
A tank can be sound while the field struggles. Review distribution, soil and groundwater before deciding on repair or replacement.
Drain Field Repair
Separate damaged distribution parts from soil and groundwater problems before choosing repairs.
Explore Drain Field ServiceDrain Field Inspection
Investigate wet spots, odors and recurring backups using records, distribution checks and site conditions.
Explore Drain Field ServiceDrain Field Replacement
Plan a suitable treatment area when repair is not enough. Review the tank and sewer options too.
Explore Drain Field ServiceOlympia, WA Septic Service Pricing
Septic Tank Pumping
- Residential pumping
- Starting at $450
- Commercial pumping
- Starting at $800
- Emergency / after-hours
- +$125 to base fee
Septic Tank Cleaning
- Standard cleaning / wash-down
- $350
- Deep cleaning / wall jetting add-on
- +$150–$250
- Commercial / grease trap
- $800–$1,500
Septic Tank Inspection
- Routine inspection
- $325
- Comprehensive real estate inspection
- $650
Installation & Replacement
- New installation / full system
- Starting at $8,799
- Advanced aerobic conversion
- Starting at $11,000
Drain Field Services
- Drain field replacement
- Starting at $6,500
- Field aeration, when suitable
- Starting at $11,000
- Repair / standalone inspection
- Request a quote
Septic Tank Repair
- Repair
- Request a quote
Olympia, WA Homes, Septic Sizes & Permit Planning
Start with the floor plan, system record, sewer availability and site conditions before choosing a tank or replacement field.
Connect the Numbers to Your Property
The listing-size figure is a county market benchmark. It does not measure every Olympia home or septic property. Use the permitted bedroom count and actual system record for septic planning.
Prepare the Permit Scope
Check sewer availability and records. A licensed designer or engineer evaluates the site and prepares the application. County soil review, conditions and seasonal groundwater studies can extend the schedule well beyond the initial allowance. Obtain approval before installation.
6 Reasons Why Septic Tanks Fail
What looks like a tank failure can start in the drain field, the plumbing or the way the property uses water.
Solids Escape the Tank
Missed pumping or a damaged outlet can clog the field.
Too Much Water
Leaks and heavy use can exceed the approved demand.
Wipes, Grease and Chemicals
These obstruct flow and can disrupt treatment.
Wet Soil and Runoff
Seasonal groundwater and roof drainage reduce field performance.
Roots and Traffic
Roots enter openings; vehicles crush pipes or compact soil.
Neglected Equipment
Failed pumps, alarms or treatment parts need timely service.
Know What Is Under Your Yard.
Compare septic types, tank sizes and the permit steps in a few clear sections.
Olympia Home Sizes
1,994 sq ft was Thurston County’s median listed-home size in September 2026, from Realtor.com via FRED. It is not an average of all homes or septic-served properties.
For septic planning, use permitted bedrooms and approved use. A 2,000-sq-ft house does not automatically need a particular tank. Additions and ADUs need review.
Tank Gallons Are Not Daily Flow
| Bedrooms | Tank minimum |
|---|---|
| 1–4 | 1,000 gallons |
| 5 | 1,250 gallons |
| 6 | 1,500 gallons |
WAC 246-272A-0232 now sets a 1,000-gallon minimum for up to four bedrooms, adding 250 gallons per bedroom after that. It requires at least two compartments. This rule took effect April 1, 2025; older 900-gallon charts are not the current new-system minimum.
Existing tanks may differ. Use the permit and record drawing. Storage gallons, daily design flow and a separate pump chamber are different measures.
Tank Materials
Concrete
A rigid, heavy shell. Check walls, joints, covers and lifting access.
Fiberglass
A lighter composite shell. Approved support and backfill protect it.
Polyethylene
A lightweight molded tank. Burial and groundwater limits are model-specific.
Use a registered, approved model and its installation instructions. No reliable public inventory establishes Olympia’s average tank size or material share. Tank shells, fields and mechanical equipment age differently.
Which Septic Type Do You Have?
Gravity
Settled wastewater flows into suitable native soil. Adequate soil and groundwater separation are essential.
Pressure Distribution
A pump doses the field through a distribution network. Controls and alarms need maintenance.
Mound
An engineered raised sand area provides treatment space where a conventional field may not fit site conditions.
Sand Filters and Treatment Units
Added treatment comes before disposal. Product-specific service, power and monitoring may be needed.
Thurston guidance also addresses sand-lined trenches and Glendon biofilters. These are design options, not interchangeable upgrades or proof of suitability for your parcel.
What Changes the Plan in Olympia?
Wet-Season Groundwater
Winter saturation can reduce the field’s ability to accept and treat wastewater. A site may need seasonal groundwater study. Keep roof drains and vehicles away from the field and reserve area.
Inspections and Home Sales
The state baseline is three-year inspections for tank-plus-gravity-soil systems and annual inspections for others, unless more frequent care is required. Pumping follows measured solids. Thurston’s 2026 Glendon update requires annual certificate renewal and a Glendon-certified professional.
Before a septic property sale, complete Thurston’s Time of Transfer process. The County requires inspection and all tanks pumped within the prior 12 months before application.
Permits and Timing
Check sewer availability, hire the proper designer or engineer, and submit the County’s required applications and site plan. Meet approval conditions before installation; finish with inspection and an accepted record drawing.
Allow 4–6 business days only as an initial planning placeholder. It is not a County service standard. Missing records, design, corrections and seasonal studies can take much longer.
Local Research and Resources
View local research and technical references
Septic Care: Do This. Skip That.
Do
- Keep inspection, pumping and permit records.
- Fix running toilets and spread laundry across the week.
- Keep lids secure and the service area accessible.
- Follow the maintenance plan for treatment equipment.
Don’t
- Flush wipes, even those labeled flushable.
- Pour grease, solvents or harsh chemicals down drains.
- Park, pave or drive heavy equipment over the field.
- Assume additives or another pump-out fix a failed field.
Septic Questions, Clear Answers
Practical answers for Olympia homes and businesses.
What size tank does a four-bedroom home need?
The current Washington single-family minimum is 1,000 gallons. The approved design or existing installed tank may be larger.
What systems are used around Olympia?
Options include gravity, pressure distribution, mounds, sand filters and registered treatment products. Your records identify the actual system. No local market-share estimate is assumed.
How often should my system be inspected?
The state baseline is at least every three years for tank-plus-gravity-soil systems and annually for others. Follow stricter local or permit requirements.
Why does trouble follow wet weather?
Seasonal groundwater, runoff or a leak can overload the disposal area. Another pump-out cannot lower groundwater.
What changed for Glendon systems?
Thurston’s 2026 updates require annual operational-certificate renewal and a Glendon-certified professional for these systems.
How long does permitting take?
The 4–6-business-day figure is an initial planning allowance, not an official County turnaround. Design, corrections, site review and wet-season studies can extend the project.
Is this emergency dispatch?
No. Reduce water use during an active backup and obtain prompt professional help. Online requests do not confirm a service time.
A Clear Plan for Your Septic System.
Tell us where you are, what is happening and the service you need.