Septic Tank Pumping in Wisconsin, WI
Septic tank pumping typically runs $297–$584 nationally, per our cost guide. Independent local pros serving Brown County, Waukesha County, Denmark and nearby areas. Describe the problem and we'll route your request — free, no obligation.
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- Pump-outs quoted by tank size — most jobs run $297–$584 (national average $432)
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Typical national cost$297 – $584Cost guide →Local Help in Wisconsin, WI
Wisconsin calls septic systems POWTS, private on-site wastewater treatment systems, and counties administer them under state rules from the Department of Safety and Professional Services (DSPS). Every county runs a maintenance program: Wisconsin Administrative Code SPS 383.55 requires each system to be inspected or pumped on schedule, generally every three years.
Wisconsin DSPS says the three-year visit is an inspection, and the tank is pumped when sludge and scum reach one-third of its volume; the service provider reports to the county within 30 days.
Sanitary permit fees are set by each county. Brown County's fee schedule lists $600 for a conventional permit, and Waukesha County's lists $551 for an in-ground soil absorption system.
Census ACS 2024 1-year data (Table B25034) count 117,305 housing units in Brown County, 44.2% built before 1980, and 178,118 in Waukesha County, 48.5% built before 1980. Older rural homes in both counties often have tanks and fields installed before mounds and pretreatment units were common.
Who runs the program depends on the county. Brown County handles POWTS through its zoning office, Waukesha County through Environmental Health in its parks and land use department, and some counties through the county health department.
USDA NRCS soil survey data explain why mounds are so common: Brown County's survey maps 25.4% of its acres as poorly drained and Waukesha County's maps 32.2%, which leaves little natural soil for a conventional trench.
Wisconsin Service Details
What providers in this area actually see: coverage, common jobs, local pricing factors, and rules worth knowing.
Service Area Notes
- County guides on this site: Brown County and Waukesha County.
- Brown County's septic homes are in the rural towns around Green Bay; Waukesha's are in western lake country.
- Each guide lists that county's permit office, fees and towns.
- Main corridors are I-41 and I-43 around Green Bay and I-94 and US 18 through Waukesha County lake country.
Common Jobs in Wisconsin
- Three-year maintenance visits and reports
- Mound and holding tank service
- Tank replacements
- Sanitary permits for replacement systems
- Emergency backups
What Drives Pricing Here
- HomeGuide's national pumping range is $300 to $700, at $0.30 to $0.70 per gallon.
- HomeGuide's tank table lists $450 to $1,050 for a 1,500-gallon tank.
- County fees differ: Brown County's fee schedule lists $450 to replace a septic tank, while Waukesha County's lists $252 for a tank replaced after structural failure.
- Method: HomeGuide's published range scaled to your tank, plus the county fee schedule.
Permits & Local Rules
- Step 1: Check with the county zoning, land use or Environmental Health office for your system's sanitary permit.
- Step 2: Keep the maintenance schedule in Wisconsin Administrative Code SPS 383.55, generally every three years, and confirm the provider files the report.
- Step 3: Get a sanitary permit before replacing a tank or field; Brown County's fee schedule lists $450 for a tank replacement and Waukesha County's lists $252.
- Step 4: A licensed plumber builds the replacement and the county inspects it before cover.
Soil & Site Conditions
- Clay: lake-plain clay near Green Bay drains slowly.
- Sand and gravel: Kettle Moraine outwash in southeastern Wisconsin drains fast.
- Bedrock: the Niagara Escarpment brings dolomite close to the surface in eastern counties.
- Water table: snowmelt and spring rainfall raise groundwater on flat ground.
- Frost: deep winter frost freezes shallow lines and lids.
- Holding tanks: where no soil treatment is possible, Wisconsin counties permit holding tanks that are pumped whenever they fill, and Brown County's fee schedule lists $750 for a new one.
Neighborhoods & Suburbs Served
Brown County · Waukesha County · Denmark · Pulaski · Delafield · Oconomowoc Lake
Emergency Response Expectations
For a backup in Wisconsin, stop water use and choose your county guide to request help.
Wisconsin FAQs
How often does Wisconsin require septic maintenance?
SPS 383.55 requires each system to be inspected or pumped on schedule, generally every three years, with a report to the county.
Does the three-year visit always mean pumping?
No. Wisconsin DSPS says the tank is pumped when sludge and scum reach one-third of its volume.
Who issues sanitary permits?
The county, through its zoning, land use or Environmental Health office.
What does pumping cost?
HomeGuide's national range is $300 to $700 for a typical tank.
Why do so many Wisconsin homes have mounds?
Wet and slowly permeable soils. USDA NRCS soil data map about a quarter to a third of Brown and Waukesha counties as poorly drained.
Who files the maintenance report?
The licensed pumper or inspector files it with the county, and Wisconsin DSPS says the report is due within 30 days of the service.
Can I replace just the tank?
Yes, with a county permit. Brown County's fee schedule lists $450 for a septic tank replacement only, and Waukesha County's lists $252 when a tank fails structurally.
Sources
- Wisconsin DSPS: Wisconsin maintenance program for POWTS
- Wisconsin Administrative Code SPS 383.55: POWTS management and maintenance
- Brown County: Planning and Land Services zoning fee schedule (sanitary permits)
- Waukesha County: Environmental Health fee schedule (sanitary permits and reconstruction)
- HomeGuide: Septic tank pumping cost (pumping, per-gallon and tank-size table) (third-party estimate)
- U.S. Census Bureau ACS 2024 1-year, Table B25034 (year structure built), Brown County, WI
- U.S. Census Bureau ACS 2024 1-year, Table B25034 (year structure built), Waukesha County, WI
- USDA NRCS Soil Data Access (SSURGO), survey area WI009, Brown County, Wisconsin: map-unit acreage by drainage class, water table, flooding and bedrock depth (queried Oct. 19, 2026)
- USDA NRCS Soil Data Access (SSURGO), survey area WI133, Waukesha County, Wisconsin: map-unit acreage by drainage class, water table, flooding and bedrock depth (queried Oct. 19, 2026)
Last reviewed 2026-10
Counties in Wisconsin
Services Available in Wisconsin
Septic Tank Pumping
Routine pump-outs on a 3–5 year schedule — the cheapest insurance a septic owner can buy. Get quotes from independent local pumpers.
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Learn more →Free Tools Before You Call
Ballpark the cost or narrow down the problem before talking to a Wisconsin provider.
Septic Tank Pumping Cost Calculator
Estimate what pumping your septic tank should cost — by tank size, lid access, and how overdue you are.
Use the free tool →Septic Problem Diagnostic — What's Wrong With My System?
Sewage backup, alarm going off, odors, or slow drains? Answer a few questions to find the likely cause and how urgent it is.
Use the free tool →Septic Pumping Frequency Calculator — How Often Should You Pump?
Find out how often your septic tank actually needs pumping — by tank size, household size, and garbage disposal use — and whether you're already due.
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