Thurston County
Plumbers in Thurston County, WA
Beaver's Plumbing is based in Monroe, about 85 to 90 miles from Olympia, Lacey and Tumwater, so Thurston County appointments are planned around a long drive. Call to confirm an arrival window for your address; emergency response times vary with distance and traffic.
Thurston County's median home was built in 1991: only 11% predate 1960 and 34% predate 1980, while 32% date from 1980 to 1999 and 35% from 2000 or later (ACS 2024 5-year estimates).
Key facts
- Serving
- All of Thurston County
- From our shop
- About 88 driving miles from Monroe
- Water
- City utilities such as Olympia and Lacey, smaller Group A and Group B public systems, and private wells. Varies by system; Olympia's main sources tested about 49 to 54 mg/L in its 2024 report, soft on the USGS scale
- Estimates
- Free, upfront flat-rate pricing
- Emergencies
- 24/7 at (425) 845-3535
Plumbing across Thurston County
Thurston County runs on groundwater: the county says aquifers supply drinking water for about 90% of residents. Olympia draws most of its supply from the McAllister Wellfield, Lacey pumps from wells tapping three aquifers, and rural homes rely on small public systems or their own wells. The county warns that poorly maintained septic systems and sewer lines can leak bacteria and nutrients into groundwater, which is why drain and septic care matters here.
Septic systems are common here. The county's septic management plan counts an estimated 53,000 of them, and Thurston County Environmental Health permits septic systems countywide, even inside Olympia's city limits. When a home with septic is sold, the county's Time of Transfer process requires the system to be pumped and inspected by a county-certified septic professional before the application is submitted.
Weather is the other local factor. The county calls floods its costliest natural hazard, from rivers such as the Nisqually, Chehalis, Deschutes, Skookumchuck and Black, and from groundwater, tides and urban runoff; in high groundwater areas, surfacing water can pond for long stretches. Winters bite harder than around Seattle, too: NOAA's 1991 to 2020 normals show 77 nights a year at or below freezing at Olympia's airport, versus 25 at Sea-Tac.
Communities we serve
Olympia Lacey Tumwater Yelm Tenino Rainier Rochester Tanglewilde Boston Harbor Steamboat Island
Near Washington State Capitol, Nisqually National Wildlife Refuge, Capitol State Forest, and everywhere in between.
Local know-how
Plumbing in Thurston County: what to know.
Prepare pipes for hard freezes
Olympia's airport averages 77 nights a year at or below 32°F and 7 at or below 20°F (NOAA 1991 to 2020). Insulate crawlspace lines and well pump houses; Beaver's handles burst pipe repairs 24/7.
Sump pumps in high groundwater
Thurston County maps high groundwater hazard areas where surfacing water can pond for long periods. Test sump pumps before winter storms, and have Beaver's check for leaks and damaged pipe in crawlspaces that flood.
Septic homes: watch the drains
With an estimated 53,000 septic systems countywide, slow drains or gurgling can point to trouble in the line or tank. Beaver's clears and camera-inspects the drain line to the tank; pumping and inspections go to a county-certified septic professional.
Water running right now?
Shut off the main water valve, turn off the water heater, and call us. Our emergency line answers 24/7.
Services
Our services in Thurston County.
- 01Plumbing
Drain Cleaning
Slow sinks, backed-up showers and main-line clogs cleared with professional cable machines and hydro-jetting, with a camera inspection when we need to see what's causing it.
- — Kitchen, bathroom, laundry and floor drains cleared
- — Main sewer line cleaning from the cleanout
- — Hydro-jetting to scour grease, scale and roots off the pipe walls
Typical price: $250–$550 for a standard drain cleaning
Learn more - 02Plumbing
Water Heater Repair & Installation
Tank and tankless, gas and electric: same-day repairs, code-compliant replacements and upgrades, with the unit sized to your household.
- — Diagnosis and repair of thermostats, elements, gas valves, igniters and leaks
- — Tank water heater replacement, same day when possible
- — Tankless water heater installation and upgrades
Typical price: $2,200–$4,000 for a replacement, depending on the unit
Learn more - 03Plumbing
Leak Detection & Repair
Leaks found with electronic detection instead of guesswork, then fixed for good: pipes, fittings, valves, fixtures, slabs and burst lines.
- — Leak detection behind walls, under floors and in slabs
- — Pipe, fitting and valve repairs (copper, PEX, galvanized, CPVC)
- — Burst and frozen pipe repair
Typical price: $500–$1,100 for most leak repairs
Learn more - 04Plumbing
Whole-Home Repiping
Aging galvanized or polybutylene supply lines replaced with PEX or copper, with small access openings, a pressure test and a written warranty.
- — Whole-home PEX or copper repipe
- — Galvanized steel and polybutylene replacement
- — New shutoff valves at fixtures
- 05Plumbing
Sewer Line Service & Repair
Main sewer lines camera-inspected, cleaned of roots and grease, and repaired or replaced when the pipe itself has failed.
- — Sewer camera inspection with the footage explained
- — Main line cleaning and root cutting
- — Hydro-jetting for grease and root buildup
- 06Heating & cooling
HVAC Repair & Installation
Furnaces, heat pumps, air conditioners and ductless mini-splits repaired, maintained and installed, plus duct cleaning and repair.
- — Furnace repair, maintenance and replacement
- — Heat pump repair and installation
- — Air conditioner service and installation
Also available in Thurston County: faucet, toilet and fixture installation, 24/7 emergency plumbing, and the Dam Good Defenders Club membership.
- Upfront, written flat-rate price before any work begins
- Dam Good Guarantee: if something we fixed isn't right, we come back and make it right, no charge.
- WA contractor license BEAVEPI741J3
Good questions
Thurston County plumbing FAQ.
Don't see your question? Call or text (425) 845-3535. A real person answers, 24/7.
Does my Thurston County septic system need an operational certificate?
Only some do. The county requires a renewable Operational Certificate for certain system types and for systems in the Henderson and Nisqually Reach marine recovery areas; its septic plan estimates 39,000 of the county's roughly 53,000 systems do not need one. Renewal takes an inspection by a certified septic professional or a certified homeowner, and the tank is pumped only when sludge and scum levels call for it.
Who oversees private wells and small water systems in Thurston County?
It depends on size. Group A systems, with 15 or more connections, are regulated by the Washington State Department of Health, with the county handling well siting and sanitary surveys for small ones. Group B systems of 3 to 14 connections are regulated by Thurston County Environmental Health, and a single-family well is a non-public well. Any new well site needs a county inspection before drilling.
Nearby areas we serve
Sources for local facts on this page
- https://www.thurstoncountywa.gov/departments/public-works/stormwater-utility
- https://cms7files.revize.com/olympia/Document_center/Services/Water%20Resources/Drinking%20Water/Water%20Quality/2024-WQR-061124.pdf
- https://cityoflacey.org/wp-content/uploads/sites/3/2025/05/Lacey_WaterReport_5-25_web.pdf
- https://www.thurstoncountywa.gov/departments/public-health-and-social-services/environmental-health/water/water-quality-resources/wastewater-water-quality-resources
- https://s3.us-west-2.amazonaws.com/thurstoncountywa.gov.if-us-west-2/s3fs-public/2023-05/PHSS_2016_OSS%20Mgt%20Plan%20Updated%20May.pdf
- https://www.olympiawa.gov/services/water_utilities/wastewater/septic_to_sewer.php
- https://www.thurstoncountywa.gov/departments/public-health-and-social-services/environmental-health/septic-systems
- https://www.thurstoncountywa.gov/departments/public-health-and-social-services/environmental-health/septic-systems/homeowner-maintenance-requirements
- https://www.thurstoncountywa.gov/departments/public-health-and-social-services/environmental-health/water/drinking-water-wells
- https://www.thurstoncountywa.gov/departments/emergency-management/threats-hazards/flood-hazards
- https://www.thurstoncountywa.gov/high-ground-water-flood-hazard-areas
- https://map.co.thurston.wa.us/Geocortex/Essentials/REST/sites/uMap/map/mapservices/48/layers/81
- https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-annualseasonal-1991-2020&stations=USW00024227,USW00024233&dataTypes=ANN-TMIN-AVGNDS-LSTH032,ANN-TMIN-AVGNDS-LSTH020,ANN-PRCP-NORMAL&format=csv
- https://censusreporter.org/profiles/05000US53067/
- https://en.wikipedia.org/wiki/Thurston_County,_Washington
Plumbing problem in Thurston County? Let's fix it right.
Free estimates, upfront flat-rate pricing, and a 24/7 emergency line at (425) 845-3535.