Well water in Colfax township, Michigan
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Testing strongly recommended
tested well samples in Colfax township exceeded the EPA limit for arsenic (10 ug/L), based on public data from USGS Water Quality Portal.
258 test results across 11 contaminants from at least 18 wells, 1988 to 1998; arsenic has the most at 32. Data refreshed September 3, 2026.
Compiled by Nick at Well Water Nerd from public records. How these pages are built
What individual samples found
Each row summarizes every public sample for that contaminant inside Colfax township. 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 |
|---|---|---|---|---|---|---|
| Arsenic 1988 to 1998 | 32 | 94% | 98.5 | 360 | 10 ug/L EPA limit | |
| Nitrate 1988 to 1998 | 30 | 20% | 0 | 0.27 | 10 mg/L EPA limit | |
| Fluoride 1988 to 1998 | 29 | 93% | 0.88 | 1.08 | 4 mg/L EPA limit | |
| Copper 1988 to 1997 | 17 | 6% | 0 | 0.001 | 1.3 mg/L EPA limit | |
| Lead 1988 to 1997 | 17 | 0% | 0 | 0 | 15 ug/L EPA limit | |
| Uranium 1997 | 15 | 0% | 0 | 0 | 30 ug/L EPA limit | |
| Sodium 1988 to 1998 | no limit | 29 | 100% | 13.3 | 33.7 | 20 mg/L health guideline |
| Chloride 1988 to 1998 | no limit | 29 | 93% | 3.34 | 14.7 | 250 mg/L nuisance level |
| Manganese 1988 to 1998 | no limit | 29 | 93% | 59.7 | 97.1 | 300 ug/L health guideline |
| Iron 1988 to 1998 | no limit | 29 | 97% | 739 | 1,450 | 300 ug/L nuisance level |
Sampled fewer than 10 times, too few to summarize: 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 addressWhat this means
The contaminants most often above their limit here are arsenic (94% of 32 samples). A well next door can differ sharply from yours because bedrock fractures, well depth and plumbing all matter, so these rates describe the area, not your tap.
Chloride, Manganese, and Iron 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 Colfax township
- 1Arsenic94% of 32 local samples were above the limit.
- 2Coliform bacteriaRecommended for every private well, every year.
- 3RadonMedian local reading is 505 pCi/L.
- 4NitrateRecommended for every private well, especially near farms or septic systems.
- 5IronDetected in 97% of local samples.
- 6FluorideDetected in 93% of local samples.
- 7ChlorideDetected in 93% of local samples.
- 8Volatile organic compounds (VOCs)1 leaking underground storage tank site on record locally.
- 9Metals panel3 hazardous waste sites on record locally.
Test your Colfax township well for arsenic, 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 $209Already 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 Colfax township numbers, $29. Every line explained, ranked by what matters, with the fix for each.
Wells in Colfax township
363 domestic wells in Colfax township are on record with the state since 1966. 100% are drilled into bedrock, and the typical well is 140 feet deep (one in ten goes past 220 feet).
In a typical Colfax township well, bedrock starts about 34 feet down, the median yield is 20 gallons per minute.
Bedrock wells are where arsenic, uranium and radon come from: the water sits in fractures in granite and metamorphic rock and picks up whatever the rock carries. That is why testing for those three matters more here than in a dug or gravel well.
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 Colfax township
Marshall aquifer
Sandstone. Sandstone wells draw from pore space in the rock and tend to be dependable. Iron, manganese and hardness are common, and some sandstones carry arsenic or radium, so a first test should include both.
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 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 Colfax township
Michigan EGLE records 1 leaking underground storage tank site and 3 hazardous waste sites in Colfax township, among 21 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.
- 1
- leaking underground storage tank siteGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 3
- hazardous waste sitesSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
- 17
- registered underground storage tank sitesRegistered tanks are regulated and inspected; they matter most when they are old or near a shallow well.
Treatment that fits the local profile
Arsenic
Point-of-use reverse osmosis; Adsorptive media (iron-based) whole-house; Anion exchange
Iron
Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
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 arsenic
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For arsenic
Whole-house arsenic and uranium filter
whole-house, at the point of entry, about $2,500
Adsorptive iron-based media; sized to your well yield.
For arsenic
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 Colfax township
No water treatment company serves Colfax township 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 Colfax township, and you get an email naming it first.
Common questions
How deep are wells in Colfax township?
The typical domestic well in Colfax township is 140 feet deep, based on 363 wells reported to the state since 1966. One in ten is deeper than 220 feet. 100% are drilled into bedrock.
Is there arsenic in well water in Colfax township?
Arsenic was detected in 94% of 32 public well samples in Colfax township, and 94% 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 Colfax township?
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.
Want the numbers themselves? Download the Michigan dataset as CSV, every county and town, with the sources named.
Sources
- USGS Water Quality Portal: 258 samples in Colfax township. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- Michigan Wellogic well records: 363 well records in Colfax township, 363 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: 21 regulated sites located in Colfax township. 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.