Well and Septic Costs in Wisconsin

By Wisconsin Well and Septic · Published 2026-11-11 · Updated 2026-11-11

Well and septic costs in Wisconsin depend on the job, your soil and your county's rules, and we found no state agency that publishes contractor prices. The ranges below come from national cost guides, so treat them as a starting point, not a quote [1][2]. We also list the Wisconsin rules that add steps and cost, and the prices Wisconsin's public labs charge for water tests [3][4].

Price ranges at a glance

All contractor figures are national estimates, not Wisconsin prices. The year is the date on each guide's byline.

Repair or replacement costs

Septic. Angi lists septic tank repairs from $230 to $3,000, drain field repair at $1,000 to $3,000, and drain field replacement at $5,000 to $12,000 [2]. Replacing the whole system runs $3,000 to $20,000 in the same guide [2]. A mound costs more: HomeGuide lists an installed mound system at $25,000 to $50,000 or more [7]. HomeGuide lists aerobic treatment units at $20,000 to $40,000 or more and recirculating sand filters at $15,000 to $25,000 or more [7].

Wells. HomeGuide puts deep well submersible pump replacement at $1,000 to $2,500 installed and shallow well jet pumps at $400 to $1,400 [9]. Angi lists a pressure switch repair at $120 to $175 and a control box at $200 to $500 [10]. Angi also says after-hours calls can add $150 to $300 [10].

Septic system cost in Wisconsin: what drives the price

• Tank size. Angi lists pumping a 1,000-gallon tank at $325 to $700 and a 1,500-gallon tank at $450 to $1,100 [1].
• Access. If the inspector does not include digging, uncovering the tank can add $50 to $250 [2].
• System type. HomeGuide says engineered systems are usually needed with poor soil, uphill homes, or where wastewater must be pumped [7].
• Well depth. Depth is the main factor in well drilling cost, since most drillers charge by the foot [8].
• The failed part. For pump repairs, the component that failed sets most of the bill [10].

Wisconsin rules that affect the bill

A soil test comes first. A new or replacement septic system needs a soil evaluation by a certified soil tester [11]. Wisconsin's test uses soil pits and profile descriptions, not only the drainage test HomeGuide describes, so ask for a written local price [6][11].

Permits and inspection. Installation cannot start until the owner holds a sanitary permit and the plans are approved, and the county must have a chance to inspect before anything is covered [12]. Ask whether the permit and county fees are in your quote.

The three-year cycle. Every septic system must be inspected at least every three years, and the tank pumped at least when sludge and scum reach one third of its volume [3][12]. Budget for that visit on a schedule. In Langlade County, missing the pumping deadline can bring a $389.50 fine and a $100 administrative fee [13].

Central Sands sites. The Wisconsin Department of Safety and Professional Services (DSPS) has suspended the hydrograph procedure for parts of Adams, Juneau, Portage, Waushara and Wood counties [14]. If your lot is there, ask the soil tester how it affects the design.

Home sale well inspections. Only a licensed well driller or pump installer, or in some counties a trained county inspector, may do a paid well inspection at a sale, and it must include bacteria, nitrate and arsenic samples [15]. WSLH charges $35 for bacteria, $35 for nitrate and $38 for arsenic [4].

Grants for contaminated wells. The Wisconsin Department of Natural Resources (DNR) well compensation grant pays 75% of eligible costs, up to a $12,000 grant, for households with family income of $65,000 or less [16]. Work done before approval is not reimbursed [16].

How to compare quotes

1. Get each quote in writing with the same scope, such as pumping plus filter cleaning, or drilling depth plus pump and pressure tank.
2. Ask what is included: digging to uncover the tank, permits, the county report, water tests [2][12].
3. Check every license before you sign. See our guide on how to check a well or septic contractor's license.
4. Ask our questions to ask before you hire and compare the answers.

Well and septic cost FAQ

How much does it cost to pump a septic tank?

Angi's 2026 national average is $428, with most homeowners paying $292 to $565 [1]. HomeGuide's 2023 range is $300 to $700 [5].

How much does a new well cost?

HomeGuide puts a 200-foot residential well at $6,000 to $16,000, including casing, pump and permits [8]. Depth changes the total most [8].

Why do some Wisconsin septic systems cost so much more?

Sites with poor soil often need engineered systems such as mounds, which HomeGuide puts at $25,000 to $50,000 or more [7]. The soil test decides which system your lot can take [11].

Are these Wisconsin prices?

No. They are national estimates from cost guides [1][2]. Angi's septic inspection table by state does not list Wisconsin [2]. Only the lab prices are Wisconsin figures [4].

Get quotes from local pros

For a price on your job, send one request through our free Get quotes form to reach well and septic companies in your area. We're a referral service, not a contractor. We pass your request to independent local contractors who may contact you.

Contractors who get your request may pay us a referral fee. We don't check licenses, and a listing here is not an endorsement.

Sources

1. Angi, "How Much Does It Cost to Pump a Septic Tank?" by Scott Dylan Westerlund, updated Oct 14, 2026, https://www.angi.com/articles/how-much-does-septic-tank-pumping-cost.htm (fetched Nov 11, 2026). $292 to $565, average $428; 1,000-gallon $325 to $700; 1,500-gallon $450 to $1,100.
2. Angi, "How Much Does a Septic Inspection Cost?" by Dan Simms, updated Oct 7, 2026, https://www.angi.com/articles/septic-inspection-cost.htm (fetched Nov 11, 2026). Basic $250 to $400; detailed $400 to $700; uncovering $50 to $250; repairs $230 to $3,000; system replacement $3,000 to $20,000; drain field repair and replacement; well inspection $250 to $550; no Wisconsin row.
3. Wisconsin DSPS, Wisconsin Maintenance Program, https://dsps.wi.gov/a-z-programs-list/powts/references/wisconsin-maintenance-program/ (fetched Nov 10, 2026). Three-year inspection; one-third rule.
4. Wisconsin State Laboratory of Hygiene, Public Environmental and Water Testing Prices (effective July 1, 2026), https://www.slh.wisc.edu/environmental/water/public-environmental-and-water-testing-prices/ (fetched Nov 11, 2026). Bacteria $35; nitrate $35; arsenic $38.
5. HomeGuide, "How Much Does Septic Tank Pumping Cost?" by Tamatha Hazen, October 2, 2023, https://homeguide.com/costs/septic-tank-pumping-cost (fetched Nov 11, 2026). $300 to $700.
6. HomeGuide, "How Much Does a Perc Test Cost?" by Tamatha Hazen, January 31, 2024, https://homeguide.com/costs/perc-test-cost (fetched Nov 11, 2026). $200 to $1,500 hand-dug; $500 to $3,000+ excavator; drainage test description.
7. HomeGuide, "How Much Does a Septic Tank System Cost?" by Tamatha Hazen, September 22, 2025, https://homeguide.com/costs/septic-tank-system-cost (fetched Nov 11, 2026). Conventional $3,500 to $8,500; mound $25,000 to $50,000+; ATU $20,000 to $40,000+; sand filter $15,000 to $25,000+; when engineered systems are needed.
8. HomeGuide, "How Much Does Well Drilling Cost?" by Tara Farmer, July 30, 2025, https://homeguide.com/costs/well-drilling-cost (fetched Nov 11, 2026). $30 to $80+ per foot; $6,000 to $16,000 for 200 feet including casing, pump and permits; depth is the main factor.
9. HomeGuide, "How Much Does a Well Pump Cost To Replace or Install?" by Tamatha Hazen, August 7, 2025, https://homeguide.com/costs/well-pump-cost (fetched Nov 11, 2026). $400 to $2,500; submersible $1,000 to $2,500; jet $400 to $1,400.
10. Angi, "How Much Do Well Pump Repairs Cost?" by Bry'Ana Arvie, updated Sep 15, 2026, https://www.angi.com/articles/how-much-does-repairing-well-pump-cost.htm (fetched Nov 11, 2026). $373 to $1,624, average $974; failed component drives cost; pressure switch $120 to $175; control box $200 to $500; after-hours $150 to $300.
11. Wis. Admin. Code ch. SPS 385, https://docs.legis.wisconsin.gov/document/administrativecode/ch.%20SPS%20385.pdf (fetched Nov 10, 2026). Certified soil tester; soil pits and profile descriptions.
12. Wis. Admin. Code ch. SPS 383 (SPS 383.21, 383.26, 383.54), https://docs.legis.wisconsin.gov/document/administrativecode/ch.%20SPS%20383.pdf (fetched Nov 10, 2026). Sanitary permit and plan approval; inspection before covering; one-third rule.
13. Langlade County Land Records and Regulations, Guide to Pumping of Private Onsite Wastewater Treatment Systems, https://www.co.langlade.wi.us/i/f/files/Land%20Records/Website%20CONV%20pumping%20instructions.pdf (posted May 2024; fetched Nov 10, 2026). $389.50 fine and $100 administrative fee.
14. Wisconsin DSPS, POWTS program page, https://dsps.wi.gov/a-z-programs-list/powts/ (notices dated 7/30/2025 and 8/22/2025; fetched Nov 10, 2026). Hydrograph suspension and counties affected.
15. Wis. Admin. Code ch. NR 812 (NR 812.44, 812.46), https://docs.legis.wisconsin.gov/document/administrativecode/ch.%20NR%20812.pdf (fetched Nov 10, 2026). Licensed inspectors only; bacteria, nitrate and arsenic samples.
16. Wisconsin DNR, Well Compensation Grant Program, https://dnr.wisconsin.gov/aid/WellCompensation.html (fetched Nov 10, 2026). 75% of eligible costs; $12,000 maximum; $65,000 income limit; no pre-approval work.