Well water in Sussex village, Wisconsin

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Testing recommended

tested well samples in Sussex village exceeded the EPA limit for nitrate (10 mg/L), based on public data from USGS Water Quality Portal.

10 private wells tested 1992 to 2025 in state summaries; 202 test results across 14 contaminants from at least 29 wells, 1966 to 2021; chloride has the most at 64. Data refreshed September 9, 2026.

Compiled by Nick at Well Water Nerd from public records. How these pages are built

What homeowner tests found

Wisconsin Well Water Quality Viewer samples: private wells tested and reported to the state, 1992 to 2025. Shares are against the level the state applies to each contaminant, named in the last column; several are stricter than EPA.

Contaminant	Above state level	Wells tested	Median	95th pct	Highest	State level
Nitrate	0%	10	0.12	3.27	3.27	10 mg/L
Arsenic	0%	1	0	0	0	10 ug/L

What individual samples found

Each row summarizes every public sample for that contaminant inside Sussex village. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.

Contaminant	Above limit	Samples	Detected	Median	Highest	Limit
Nitrate 1966 to 2021	13%	30	100%	3.13	14.8	10 mg/L EPA limit
Fluoride 1966 to 2021	0%	13	92%	0.12	0.5	4 mg/L EPA limit
Copper 2000 to 2021	0%	11	100%	0.001	0.035	1.3 mg/L EPA limit
Uranium 2000 to 2021	0%	11	82%	0.531	1	30 ug/L EPA limit
Arsenic 2000 to 2021	0%	11	45%	0	0.74	10 ug/L EPA limit
Lead 2000 to 2021	0%	11	45%	0	0.09	15 ug/L EPA limit
Chloride 1966 to 2021	no limit	64	100%	96.5	440	250 mg/L nuisance level
Manganese 1966 to 2021	no limit	15	93%	4.29	69.6	300 ug/L health guideline
Iron 1966 to 2021	no limit	13	69%	6.3	350	300 ug/L nuisance level
Sodium 1966 to 2021	no limit	13	100%	155	236	20 mg/L health guideline

Sampled fewer than 10 times, too few to summarize: PFOS (2), PFOA (2), Radium (226 + 228) (4), Radon (2).

Closer than the town

See the sampled wells near your address

The same records, drawn around one point: which wells within a few miles were sampled and what they found, how deep the wells next to you were drilled, and any leaking tank or cleanup site within a mile.

Check my address

What this means

Among homeowners in Sussex village who sent a sample to the state lab, no health-based limit was exceeded often enough to publish a share. That is good news, but a single well can still be the exception.

What to test for in Sussex village

1
Nitrate
13% of 30 local samples were above the limit.
2
Coliform bacteria
Recommended for every private well, every year.
3
Radon
Median local reading is 475 pCi/L.
4
PFOS
Above the limit in 1 of 2 local samples; too few to quote a rate.
5
PFOA
Above the limit in 1 of 2 local samples; too few to quote a rate.
6
Copper
Detected in 100% of local samples.
7
Chloride
Detected in 100% of local samples.
8
Volatile organic compounds (VOCs)
18 leaking underground storage tank sites on record locally.

Test your Sussex village well for nitrate, coliform bacteria and radon

Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.

Order the Tap Score well water test kit, from $209 Already tested? Upload the report

Just want bacteria checked first? Tap Score coliform and E. coli test, $99. Coliform and E. coli are the tests every well needs every year.

Want a quick look before paying for a lab? Home well water test strips on Amazon check hardness, iron, pH and nitrate in minutes. They are a screen, not a result: arsenic, bacteria, uranium and PFAS need a certified lab.

Affiliate links: the merchant pays us a commission and the price is the same for you. It does not change what the data above says. As an Amazon Associate we earn from qualifying purchases.

Where to get a well tested in Wisconsin: certified labs, state programs and prices.

Already have results back? Get your lab report read against the Sussex village numbers, $29. Every line explained, ranked by what matters, with the fix for each.

The rock under Sussex village

Silurian-Devonian aquifers

Carbonate-rock. Limestone and dolomite move water through cracks and solution channels, sometimes very fast. Bacteria and nitrate can travel from the surface to a well in days, so annual bacteria testing matters more here than most places; hardness is a given.

Classification from the USGS Principal Aquifers of the United States (national map, 2003 edition, GIS release 2015), read at the town centroid. A single well can sit in a different unit, especially near a boundary.

Official help in Wisconsin

Two places to start that are not selling anything: the state program that answers private well questions, and its list of labs certified to run drinking water tests. A certified lab is the difference between a result you can act on and a number.

Wells, Wisconsin DNR
Laboratory Certification, Wisconsin DNR

Contamination sources on record in Sussex village

Wisconsin DNR records 18 leaking underground storage tank sites in Sussex village, among 39 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.

18: leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
1: lined landfill or transfer facility
20: other remediation projects

Treatment that fits the local profile

Nitrate

Point-of-use reverse osmosis; Anion exchange; Distillation

Chloride

Point-of-use reverse osmosis; Distillation

Manganese

Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis

Systems we would look at first

Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.

For nitrate

Under-sink reverse osmosis system

under-sink or countertop, about $300

Look for NSF/ANSI 58 certification listing the contaminant you need removed.

For nitrate

Aquasana SmartFlow reverse osmosis

under-sink or countertop, about $225

Certified to NSF/ANSI 58 and 53 to reduce arsenic (96%, pentavalent), fluoride (90%), lead (99%), nitrate, nitrite and PFOA/PFOS at the kitchen tap, with a remineralizer.

For manganese

Iron and manganese oxidizing filter

whole-house, at the point of entry, about $1,800

Air-injection or greensand media; fixes staining at the source.

Free, no obligation

Get on the list for a free in-home water test in Sussex village

No water treatment company serves Sussex village through Well Water Nerd yet. We are signing licensed companies on county by county: they test at your tap for free, walk you through the numbers, and quote treatment only if something needs fixing. Leave your details and you are first in line. Nothing is shared until a company joins for Sussex village, and you get an email naming it first.

Common questions

Is there arsenic in well water in Sussex village?

Arsenic was detected in 45% of 11 public well samples in Sussex village, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.

How often should I test a private well in Sussex village?

Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.

Towns near Sussex village

Closest first. Groundwater does not stop at a line on a map, so the next town over is a fair second opinion.

Want the numbers themselves? Download the Wisconsin dataset as CSV, every county and town, with the sources named.

Sources

USGS Water Quality Portal: 202 samples in Sussex village. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
Wisconsin Well Water Quality Viewer samples: summaries for 2 contaminants in Sussex village, up to 10 wells each. Private well samples compiled by the UWSP Center for Watershed Science and Education from the DNR Groundwater Retrieval Network, DATCP surveys, the UWSP Water and Environmental Analysis Lab and county health programs, published in the Wisconsin Well Water Quality Viewer with Wisconsin DHS. Samples are located to the town, village or city they fall in; one result per well and parameter (the latest) so repeat samples do not double count; wells without a state well number are keyed by location. Shares are against Wisconsin NR 140 enforcement standards (arsenic 10 ug/L, nitrate 10 mg/L as N, manganese 300 ug/L, lead 15 ug/L, copper 1.3 mg/L) and the iron and chloride secondary levels. Many samples were submitted by homeowners with a reason to test, so shares can run above a random survey. Retrieved September 9, 2026.
Wisconsin DNR regulated sites: 39 regulated sites located in Sussex village. Open and closed remediation activities (BRRTS, including leaking underground storage tanks and spills) and landfill and waste sites from the Wisconsin Department of Natural Resources. Retrieved September 9, 2026.

Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.