Wisconsin county well guide

Well Water in Marinette County, WI: Testing, Contractors and Rules

About 8,790 households in Marinette County, 54% of the county, rely on a private well. Nobody tests that water unless the owner does.

Labs within 40 milesLicensed contractors
54%of households on a private well
Share on wells, county vs state
Marinette County54%
Wisconsin average28%
34licensed contractors serve the county
39 mito the nearest certified lab, Analytichem LLC
Nostatewide test required when a home is sold

In Marinette County, roughly 54% of households, about 8,790 homes, draw their water from a private well. Nobody tests it, treats it or inspects it unless the owner does.

Local rules for wells in Marinette County

In Marinette County the state, not the county, sets the rules. The DNR licenses every driller and pump installer, requires a notification and fee before a new well, and requires the driller to test it for coliform and nitrate. Selling a home does not trigger a state test, though lenders often ask for one. The state’s recommendations are in the cards below.

At a glance

Water test for a new wellRequired

Under NR 812 the well driller must collect a bacteria (coliform) and nitrate sample from every new well and report the results to DNR; the pump installer collects a bacteria sample after installing or replacing a pump. A well notification form and fee are filed with DNR before drilling.

Water test when a home is soldNot required statewide

No statewide requirement at sale. If a well is inspected for a real-estate transaction, only a licensed well driller or pump installer may perform the paid inspection, and the inspection must include bacteria, nitrate and arsenic tests.

What the state recommends

DNR and DHS recommend testing for coliform bacteria and nitrate every year, arsenic and lead at least every 5 years (arsenic yearly in known areas of the Fox River Valley), fluoride once, and manganese, PFAS or radium where local conditions warrant. Test any time taste, color or odor changes or after flooding.

Free or low-cost testingAvailable

Some county health departments and UW Extension programs run subsidized nitrate and bacteria screening clinics; check the county health department. The DNR-certified lab list shows which labs accept homeowner samples.

Getting your water tested near Marinette County

The nearest certified lab is Analytichem LLC in Luxemburg, about 39 miles from the county center, and it accepts samples from homeowners. Mail-in kits fill the gap for anything it does not run.

1 certified labs within 40 miles

Licensed well contractors serving Marinette County

Licensed help in Marinette County includes Aqua Well & Pump Systems Inc and Brix Plumbing and 29 others. Every listing was matched to the Wisconsin license list; the “verify” link on each profile opens the state lookup.

Well depth and water chemistry

Well depth and water chemistry in Marinette County follow the rock underneath it. Depth varies across the county; the state well record search shows logs for nearby wells.

Typical well depth

Varies by location. Check the state well record search for logs of nearby wells.

Contaminants to test for
  • Coliform bacteria
  • Nitrate
  • Arsenic (Fox River Valley
  • St. Peter sandstone)
  • Manganese
  • Iron
  • Hardness
  • Strontium (eastern counties)
  • Radium (eastern deep sandstone aquifer)
  • PFAS (Marinette
  • Peshtigo
  • Dane County areas)
  • Lead

Neighboring counties: Oconto County, Door County, Menominee County, Florence County.

What well work costs in Marinette County

Basic bacteria and nitrate test$25 to $75lab fee, homeowner sample
Full panel lab test$150 to $400metals, VOCs, radiologicals
Well inspection$250 to $550flow, pressure, visual, water test
Submersible pump replacement$1,200 to $4,500parts and labor
Pressure tank replacement$400 to $1,200installed
Whole-house treatment system$800 to $6,000softener, iron filter, UV, RO
New well drilled$5,500 to $25,000about $25 to $65 per foot
Shock chlorination$80 to $300or about $20 as a DIY job

National ranges from published 2025 to 2026 contractor pricing. Local quotes vary with depth, access and materials.

Questions Marinette County well owners ask

How many homes in Marinette County are on a well?

About 8,790, or 54% of households, based on Census housing data and state well surveys. The share is highest outside the towns with public water.

Where is the closest certified lab to Marinette County?

Analytichem LLC in Luxemburg, about 39 miles away. It accepts homeowner samples.

Do I need a permit to drill a well in Marinette County?

A well notification and fee must be filed with the Wisconsin DNR before drilling, and only a DNR-licensed well driller may drill it. Some counties add their own permit or setback review, so check with the county land conservation or zoning office.

What does a well test cost near Marinette County?

A bacteria and nitrate test runs $25 to $75 at most certified labs; a full panel with metals is $150 to $400. Several county health departments and the state lab of hygiene sell homeowner kits for bacteria and nitrate at low cost; ask the county about screening clinics.