Well Water Testing · Madrid, IA
Water testing in Madrid
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…
Madrid · Boone County
Well Water Testing in Madrid
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.
Madrid is a former coal-camp town near the High Trestle Trail, with older stock and trail-era new builds. Housing here runs to former coal-camp housing and older town stock, plus trail-era new builds, across the town core and the newer edges near the High Trestle Trail.
Well water in Boone County
About 72% of Boone County is row-crop land. Iowa DNR says every private well used for drinking should be tested at least once a year, with bacteria and nitrate annually and arsenic every 3 years, and notes that shallow wells may contain high nitrate.
County facts checked October 2026 against: iowadnr.gov, shl.uiowa.edu.
Home inspection in Madrid → · Water testing in Iowa, explained →
Pairs well with:
Water tests available in Madrid
Bacteria
Shows whether surface water or waste is reaching the well.
- Surface contamination reaching the well
- Fecal contamination from septic, manure or wildlife
Health chemicals
No taste, color or smell. These are the long-term health checks.
- Fertilizer, septic and manure; highest risk to infants10 mg/L (EPA)
- Natural arsenic from rock and soil10 µg/L (EPA)
- Lead service lines, solder and brass fixtures
- ManganeseNatural manganese; a concern for infants
- FluorideNatural fluoride; dental health4.0 mg/L (EPA)
- UraniumNatural radionuclide in groundwater30 µg/L (EPA)
Petroleum & solvents
Fuel and chemical spills from old tanks or nearby sites.
Household quality
Staining, scale and taste, and choosing the right treatment.
- IronRusty staining and metallic taste
- HardnessScale buildup; sizing a water softenerNo health standard
- pHCorrosive or scaling water6.5 to 8.5, aesthetic (EPA)
- SulfateTaste and odor; diarrhea risk for infants250 mg/L, aesthetic (EPA)
Limits shown are EPA drinking water standards. Compare your lab results with these values.
Madrid private well testing timeline
| Test | Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | Year 6 |
|---|---|---|---|---|---|---|
| Coliform bacteria | ||||||
| Nitrate | ||||||
| Arsenic |
When to test your water
- Every yearColiform bacteria and nitrate, the basic safety checks for a private well.
- At least onceArsenic and manganese. Iowa DNR's testing list repeats arsenic every 3 years.
- Before a baby drinks the waterNitrate. Water above 10 mg/L as nitrogen should not be used for infant formula or juice.
- When you buy a homeA full baseline while you can still ask questions or negotiate.
- New well or well workWhen a well is new and after service on the well or pump.
- After a flood or power outageIf flood water was near or reached the well, or an outage dropped the water pressure.
- When taste, color or smell changesA change in the water is a reason to test.
- Near a fuel tankVOCs, plus DRO for diesel and fuel oil. Iowa DNR names gasoline among the VOCs some wells are susceptible to, and Iowa's well rules list 100 feet between a well and a liquid fuel storage tank other than propane.
- City water in an older homeLead. Iowa DNR says homes built before 1986 are more likely to have lead pipes, fixtures and solder.
Based on: Iowa DNR private wells, Iowa DNR testing frequency, Iowa DNR why test, Iowa DNR floods, State Hygienic Laboratory, 567 IAC 49.
How to get it done
- Choose your testsPick the water testing you need in the free instant quote.
- Pick a timeBook online. The quote takes about 30 seconds.
- Get certified lab resultsA certified laboratory analyzes the water and reports each result.
Well water around Madrid, Boone County
How far a well must be from common hazards in Madrid
- 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
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 Madrid: what happens at the sale
- 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.
- 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.
- 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.
- 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)).
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.
My home is on city water in Iowa. Is water testing still worth it?
Often, yes. Lead in drinking water comes mainly from service lines and home plumbing. Iowa DNR says a water system cannot control the materials used in home plumbing. Your utility sends a Consumer Confidence Report each year. Under the federal Lead and Copper Rule, utilities sample selected homes, those more likely to have lead plumbing. Iowa community water systems had to prepare a lead service line inventory under the federal rule, and it must be publicly available. DNR expects homes built after 1988 to have service lines made of something other than lead. To learn what your service line is made of, ask your water utility. DNR also notes that utilities are not required to offer lead testing on request. EPA says testing is the only sure way to know whether harmful amounts of lead are in your water.
Is nitrate a concern for Boone County wells?
About 72% of Boone County is row-crop land, and Iowa DNR notes that shallow wells may contain high nitrate. DNR says you cannot tell whether well water is safe by look, taste or smell; lab analysis is the only way to know. DNR lists nitrate as a yearly test, and the State Hygienic Laboratory says water above 10 mg/L should not be used for infant formula.
Is nitrate in well water dangerous for infants?
Yes. The State Hygienic Laboratory says nitrate above 10 mg/L as N may pose a serious health hazard for infants, and such water should not be used in infant formula or juice. Infants fed it can develop methemoglobinemia, or blue baby syndrome, a life-threatening illness. Boiling does not remove nitrate. Shallow wells and poorly located, built or maintained wells are more likely to have nitrate, so annual testing is the way to know. A nitrate test is the only way to learn whether the water at a home with young children is below the 10 mg/L limit.
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.
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