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Well Water Testing · Milo, IA

Water testing in Milo

Water testing for Iowa homes, above all those on a private well. An accredited laboratory can test the water for coliform bacteria and E. coli…

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Milo · Warren County

Well Water Testing in Milo

Water testing for Iowa homes, above all those on a private well. An accredited laboratory can test the water for coliform bacteria and E. coli, nitrate, arsenic and more. Iowa DNR recommends testing a private well at least once a year.

Milo is a Warren County rail town of older homes that lost its trains in 1961. Housing here runs to late-1800s and early-1900s frame homes from the town's 1878 founding and its rail years, with postwar building layered in, across the town core along the old CB&Q alignment, the outer residential blocks, and the Warren County acreages beyond.

Milo is served by our Des Moines team →  ·  (563) 517-7815

Well water in Warren County

Iowa DNR says private wells should be tested for coliform bacteria and nitrate every year and for arsenic at least once. Free basic testing is offered through the Grants to Counties Well Testing Program, so ask the Warren County health department. We found no published county-level well-quality numbers for Warren. Statewide, the Iowa Geological Survey says deeper bedrock aquifers carry poorer natural water quality because the water has touched minerals longer, so a well's depth and aquifer matter as much as its location.

County facts checked October 2026 against: iowadnr.gov, iowadnr.gov, igs.iihr.uiowa.edu, naturalresources.extension.iastate.edu.

Well water around Milo, Warren County

Milo, IA water testing: well cap in a backyard in Iowa spring green
DRO: a screen for diesel and heating-oil petroleum →
Water sample bottles in a small cooler with ice packs at a Iowa basement utility sink (Warren County, Iowa)
Coliform bacteria: Iowa DNR recommends testing every year →
Milo, IA water testing: white hard-water scale on a shower door in a modern Iowa bathroom
Nitrate: EPA limit 10 mg/L, highest risk to infants →

See all Milo inspections →  ·  Water testing in Iowa, explained →

Water tests available in Milo

Bacteria

Shows whether surface water or waste is reaching the well.

  • Total coliform bacteria
    Surface contamination reaching the well
  • E. coli
    Fecal contamination from septic, manure or wildlife

Health chemicals

No taste, color or smell. These are the long-term health checks.

  • Nitrate
    Fertilizer, septic and manure; highest risk to infants
    10 mg/L (EPA)
  • Arsenic
    Natural arsenic from rock and soil
    10 µg/L (EPA)
  • Lead
    Lead service lines, solder and brass fixtures
  • Manganese
    Natural manganese; a concern for infants
  • Fluoride
    Natural fluoride; dental health
    4.0 mg/L (EPA)
  • Uranium
    Natural radionuclide in groundwater
    30 µg/L (EPA)

Petroleum & solvents

Fuel and chemical spills from old tanks or nearby sites.

  • VOCs (volatile organic compounds)
    Fuels, solvents, degreasers and paints
    Varies by compound (EPA)
  • DRO (diesel range organics)
    Diesel and heating-oil petroleum

Household quality

Staining, scale and taste, and choosing the right treatment.

  • Iron
    Rusty staining and metallic taste
  • Hardness
    Scale buildup; sizing a water softener
    No health standard
  • pH
    Corrosive or scaling water
    6.5 to 8.5, aesthetic (EPA)
  • Sulfate
    Taste and odor; diarrhea risk for infants
    250 mg/L, aesthetic (EPA)

Limits shown are EPA drinking water standards. Your lab report compares each result to the standards that apply.

Milo private well testing timeline

Iowa DNR recommends testing a private well at least once a year. Its testing guidance lists coliform bacteria and nitrate every year and arsenic every 3 years, with at least one arsenic test for every well. Source: Iowa DNR
TestYear 1Year 2Year 3Year 4Year 5Year 6
Coliform bacteria
Nitrate
Arsenic

Test again any time after flooding, after work on the well, or when the water's taste, color or smell changes, and always when you buy a home with a well.

How far a well must be from common hazards in Milo

  • Property line4 ft
  • Building sewer line10 ft
  • LP gas tank15 ft
  • Roadside ditch15 ft
  • Stream, pond, lake or wetland25 ft
  • Septic tank50 ft
  • Septic absorption field100 ft
  • Fuel oil or gasoline tank100 ft
  • Fertilizer or chemical storage150 ft
Source: Iowa Administrative Code 567, chapter 49

Septic, feedlot or fuel tank near the well? A coliform and nitrate test shows whether it is reaching the water. Get a free instant quote

Buying a home with a well in Milo: what happens at the sale

  1. Groundwater Hazard StatementIowa Code 558.69 requires a groundwater hazard statement filed with the declaration of value when a listed condition (including any known well and its status under 455B.190, or a private sewage disposal system) exists on the property, signed by a seller or agent, with a copy given to the buyer.
  2. Wells on the propertyIf known wells are on the property, the statement must give the approximate location of each and its status under Iowa Code 455B.190 (abandoned wells properly plugged); the owner is responsible for the accuracy of the information.
  3. Septic time-of-transfer inspectionIowa Code 455B.172(11) requires a private sewage disposal system serving a building to be inspected before any transfer of ownership, by a DNR-certified inspector, and the county recorder will not record the deed without the report or a binding acknowledgment.
  4. Failing systemsA system that is failing to treat wastewater must be renovated to current standards by the seller or, by agreement and within a reasonable time set by the county board of health or DNR, by the buyer (455B.172(11)(c)).
Source: Iowa Code and Iowa DNR

The paperwork tells you a well exists, not what is in it. Add water testing to your inspection. Get a free instant quote

Questions

Common questions.

Who needs well water testing in Iowa?
Any home on a private well, and above all one you are buying. Iowa DNR recommends testing a private well at least once a year, and also when a well is new, after work on the well or pump, and when the water changes in look, smell or taste.
Is well water testing part of the home inspection?
It is an add-on. Add it to your home inspection quote. Testing early in your inspection window leaves time to act on the results.
Where can a Warren County well owner get free water testing?
The Iowa DNR says free basic testing comes through the Grants to Counties Well Testing Program and tells owners to contact their local county health department. We did not find a Warren County page confirming current details, so call that office before relying on it. DNR's annual guidance covers bacteria and nitrate, with arsenic at least once.
How old is the wiring likely to be in a Milo house?
Older than the panel suggests, in a lot of cases. Milo was founded in 1878 as Belmont, renamed the following year, and had rail service from 1879 until 1961, so the stock spans the original rail-era houses through the postwar years. What we see repeatedly is a modern breaker panel installed over branch circuits that were never replaced: cloth-insulated conductors, ungrounded two-prong outlets, junctions buried in walls, knob-and-tube surviving in attics and crawlspaces where nobody looked. A new panel does not make old wire safe, so what actually feeds the receptacles matters more than the label on the door.
When should I test the water if I'm buying a home with a well?
DNR recommends testing when a well is brand new, after any service on the well or pump, after power outages that cause loss of pressure, and when water looks, smells or tastes different. Treat a purchase like a new-owner situation: the owner of the well is responsible for its testing. Coliform bacteria and nitrate are annual tests, and arsenic is recommended at least once. A coliform, nitrate and arsenic test on the well before closing gives the buyer a lab result for the water they will be drinking.
Can I order a test kit from the State Hygienic Laboratory instead?
Yes. If the sanitarian cannot collect your sample or you prefer to do it yourself, the State Hygienic Laboratory at the University of Iowa supplies sampling kits with sterile bottles and instructions. Use only the bottle the lab provides, since the coliform and nitrate bottles are specially prepared. The lab says samples should reach it within 48 hours of collection, so ship the same day and avoid Fridays and holidays. A water test during the sale of a home gives both sides lab data on the well rather than assumptions.
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