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Well Water Testing

Private well owners are responsible for their own water. Oasis Well Service offers well water testing for bacteria, lead, nitrates and pH across Prince William, Fauquier and nearby counties, so you know what you are drinking and what to fix if something turns up.

Why well water testing matters

If you are on public water, someone else tests it for you. On a private well, that job is yours. Water can look, smell and taste fine and still carry bacteria or other problems you cannot notice. A test is the only way to know.

We are well and water system specialists, so we do more than hand you a sheet of numbers. We explain what each result means for your family and whether anything needs to be done. Most of the time, the news is good and you can stop wondering.

What we test for

  • Bacteria: total coliform and E. coli, the main signs that surface water or waste may be reaching the well
  • Lead: which can come from older pipes, solder or fixtures in the home
  • Nitrates: which can come from fertilizer, septic systems or farm runoff
  • pH: acidic water can corrode pipes and leave blue-green stains

These four cover the most common concerns for private wells in our area. Low pH shows up often in western Fauquier and Loudoun, where harder crystalline rock is common. In parts of Prince William, hardness and iron are the more frequent complaints, and a test helps sort out which is which.

When to test your well

A yearly bacteria test is the standard recommendation for private wells. Beyond that, test whenever something changes.

  1. Once a year, as a routine check
  2. After flooding or heavy rain that pooled near the wellhead
  3. After any well work, such as a new pump or casing repair
  4. When buying or selling a home with a well
  5. When a baby is coming, or there is an infant in the house
  6. When the taste, smell or color of the water changes

Heavy rain and flooding can let surface water into a well with a cracked casing or a poor cap. If the ground around your well stayed wet or you saw water pooling near the well, test. Until you have results, bottled water for drinking and cooking is the safe choice.

How a sample is taken

How the sample is collected matters. A careless sample can pick up bacteria from a dirty faucet and give a false result. We take samples the right way and keep them handled properly, so the results reflect your well and not the tap.

If your results come back bad

Bacteria

We look at how bacteria got in, often the cap or casing. We can fix the entry point and, where it makes sense, install a UV light from GDS or Viqua through our UV disinfection service. After any fix, we retest to make sure the problem is gone.

pH, hardness and more

Low pH, iron and hardness point to water treatment, like an acid neutralizer or softener. High nitrates or lead need a closer look at the source, and we will talk through your options honestly.

Testing across our service area

We test wells across Prince William County, Fauquier County and the counties around them, including Bealeton, Manassas Park and Woodbridge. Once your results are back, our guide to reading your well water test results explains each line. Call 703-791-3981 to set up a test.

Recent well water testing work

Questions we hear a lot

How often should I test my well water?

A yearly bacteria test is the standard recommendation for private wells. You should also test after flooding, after any well work, when buying a home, or if the water changes in taste, smell or color. Call 703-791-3981 to set one up.

What does a positive coliform test mean?

Coliform bacteria are a warning sign that surface water or other contamination may be reaching your well. Most coliform are not harmful on their own, but they mean the well is not sealed as well as it should be. We can help find the cause and fix it.

Is E. coli in well water dangerous?

E. coli can make people sick, so a positive result should be taken seriously. Use bottled or boiled water for drinking and cooking until the problem is fixed. We can repair the cap or casing and install a UV light from GDS or Viqua if it makes sense.

Should I test my well water if I have a new baby?

Yes. Infants are more sensitive to things like nitrates and bacteria, so testing before or soon after a baby arrives is a smart move. It is a common reason people call us.

Can my well water have lead in it?

Lead usually comes from older pipes, solder or fixtures inside the home rather than from the well itself. A test will show whether it is present. If it is, we can talk through your options.

Do I need to test my well after a flood?

Yes. Flooding and heavy rain can let surface water into a well, especially one with a cracked casing or a poor cap. Test after the water goes down, and do not drink it until you have results.

My water tastes fine. Do I still need to test it?

Yes. Bacteria, nitrates and lead usually have no taste, smell or color. Good-tasting water can still have a problem, which is why yearly testing is recommended.

Do you offer well water testing near Manassas and Bealeton?

Yes. Oasis Well Service tests wells across Prince William, Fauquier and the surrounding counties. Call 703-791-3981 and we will set up a visit.

Questions about well water testing?

Tell us what you are seeing. Diagnosis is free, within reason, and no-water calls go first.