Well water in Berrien County, Michigan

No public well test results have been compiled for Berrien County yet. The USGS national arsenic model estimates that 4% of the 45,599 people on private wells there draw water with arsenic above 10 ug/L, the EPA limit, based on geology, well depth and land use rather than local tests.

The strongest signal is coliform bacteria: Recommended for every private well, every year, too few samples to carry the headline but first on the test list below.

107 test results across 10 contaminants from at least 5 wells, 1978 to 2022; nitrate has the most at 26. Data refreshed September 15, 2026.

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

An estimated 45,599 people in Berrien County get their drinking water from a private well, per USGS 2015 county water use. That is about 29% of residents.

Separately, the USGS national arsenic model estimates that 4% of the 45,599 people on private wells in Berrien County draw water above 10 ug/L (the model's range is 3% to 5%), from geology and well depth rather than local tests.

What individual samples found

Each row summarizes every public sample for that contaminant inside Berrien County. 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 1978 to 2022	0%	26	38%	0	1.96	10 mg/L EPA limit
Fluoride 1978 to 2022	0%	13	100%	0.08	0.1	4 mg/L EPA limit
Sodium 1978 to 2022	no limit	13	100%	12.5	23.3	20 mg/L health guideline
Manganese 1978 to 2022	no limit	13	92%	4.46	73.8	300 ug/L health guideline
Iron 1978 to 2022	no limit	13	85%	80.7	473	300 ug/L nuisance level
Chloride 1978 to 2022	no limit	13	100%	5.97	40.4	250 mg/L nuisance level

Sampled fewer than 10 times, too few to summarize: Copper (5), Lead (5), Arsenic (5), Uranium (1).

Closer than the county

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 contaminants with a federal limit, no tested sample in Berrien County came back above it. That is reassuring, but sampling is uneven: wells that were never tested are not in this data.

Manganese, Iron, and Chloride are widespread in local groundwater. They are mainly a staining and taste problem, but high manganese also carries a health advisory for infants.

What to test for in Berrien County

1
Coliform bacteria
Recommended for every private well, every year.
2
Nitrate
Recommended for every private well, especially near farms or septic systems.
3
Fluoride
Detected in 100% of local samples.
4
Chloride
Detected in 100% of local samples.
5
Manganese
Detected in 92% of local samples.
6
Iron
Detected in 85% of local samples.
7
Volatile organic compounds (VOCs)
140 leaking underground storage tank sites on record locally.
8
Metals panel
416 hazardous waste sites on record locally.

Test your Berrien County well for coliform bacteria, nitrate and fluoride

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 Michigan: certified labs, state programs and prices.

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

Wells in Berrien County

21,690 domestic wells in Berrien County are on record with the state since 1922. <1% are drilled into bedrock, and the typical well is 92 feet deep (one in ten goes past 167 feet).

In a typical Berrien County well, bedrock starts about 113 feet down, the median yield is 30 gallons per minute, <1% of wells yield under 3 gallons per minute and usually need a storage tank.

892

1960s

2,851

1970s

2,131

1980s

5,260

1990s

5,405

2000s

3,083

2010s

2,024

2020s

Find your own well's report

The state keeps the driller's report for most wells drilled since 1984. It tells you how deep your well is, where bedrock starts, and how much water it makes, which decides what treatment can work.

Open Wellogic (EGLE) and choose Water Well.
The record lists depth, casing, static water level, the pump test and the geologic log.

Michigan has required well records since 1966, so most drilled wells are on file.

The rock under Berrien County

Not a principal aquifer

The USGS map places this area outside any principal aquifer, which usually means wells here draw from fractured bedrock or thin local deposits rather than a large regional aquifer. Bedrock wells of that kind are where arsenic, radon and uranium turn up, and yields vary from well to well.

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

Official help in Michigan

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.

Private Residential Water Well Testing, Michigan EGLE
Laboratory certification program, Michigan EGLE

Contamination sources on record in Berrien County

Michigan EGLE records 140 leaking underground storage tank sites and 416 hazardous waste sites in Berrien County, among 1,135 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.

140: leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
416: hazardous waste sitesSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
577: registered underground storage tank sitesRegistered tanks are regulated and inspected; they matter most when they are old or near a shallow well.
2: lined landfills and transfer facilities

Treatment that fits the local profile

Manganese

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

Iron

Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration

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 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 Berrien County

No water treatment company serves Berrien County 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 Berrien County, and you get an email naming it first.

Common questions

How deep are wells in Berrien County?

The typical domestic well in Berrien County is 92 feet deep, based on 21,690 wells reported to the state since 1922. One in ten is deeper than 167 feet. <1% are drilled into bedrock.

How often should I test a private well in Berrien County?

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 in Berrien County

30 towns have fewer than 30 public samples and are included in the Berrien County totals above rather than shown separately: Bainbridge township, Baroda township, Benton charter township, Benton Harbor, Berrien township, Bertrand township, Bridgman, Buchanan, Buchanan township, Chikaming township, Coloma, Coloma charter township, Galien township, Hagar township, Lake charter township, Lincoln charter township, New Buffalo, New Buffalo township, Niles, Niles township, Oronoko charter township, Pipestone township, Royalton township, Sodus township, St. Joseph, St. Joseph charter township, Three Oaks township, Watervliet, Watervliet township, Weesaw township.

Counties near Berrien County

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

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

Sources

USGS Water Quality Portal: 107 samples in Berrien County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
USGS national arsenic model (Ayotte 2017): estimated share of 45,599 people on private wells in Berrien County above 10 ug/L of arsenic, from geology, well depth and land use. County estimates of domestic well users with arsenic above 10 ug/L from the USGS national logistic regression model (Ayotte, Medalie and Qi, 2017), with private well population from the USGS 2015 county water-use compilation (Dieter and others, 2018). Retrieved September 15, 2026.
Michigan Wellogic well records: 21,690 well records in Berrien County, 21,690 domestic. Water well records from Wellogic, the Michigan Department of Environment, Great Lakes, and Energy statewide well database. Only aggregates are shown; owner names and addresses are never stored. Retrieved September 16, 2026.
Michigan EGLE regulated sites: 1,135 regulated sites located in Berrien County. Part 201 environmental contamination sites, underground storage tank facilities and Part 115 landfills from the Michigan Department of Environment, Great Lakes, and Energy. Retrieved September 16, 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.