Private Well Owners

If you use a private well for your drinking water, the United States Environmental Protection Agency (EPA) and the Centers for Disease Control and Prevention (CDC) both recommend annual sampling to ensure optimal water quality. Wells should also be inspected once a year to make sure there are no mechanical problems.

In addition to annual testing, you should consider more frequent testing if:

• Someone in the house is pregnant or nursing
• The water is being used to prepare formula for an infant
• Your neighbors find a dangerous contaminant in their water
• You note a change in water taste, odor, color or clarity
• When you replace or repair any part of your well or plumbing system

Test Kits Available

• Test kits for private drinking water are available for pickup and drop-off for testing at no charge.
• Kits are available Monday – Friday, 8:00 AM-4:30 PM
• The kits are for private well owners.
• The kits are distributed at any of these locations:
  • University Office Plaza-Chopin Building-Suite 105, Newark
  • Delaware Public Health Laboratory, Smyrna
  • Thomas Collins Building-Suite 5, Dover
  • Adams State Service Center, Georgetown

The kits test for bacteria and the following chemical parameters:

• Nitrate
• Nitrite
• Iron
• Fluoride
• Alkalinity
• pH
• Chloride
• Sulfate
• Sodium
• Hardness

Please Note:

• Samples should not be collected on Friday Saturday or Sunday.
• The Well owner should allow their water to run for 5 minutes then fill the containers at a non-swivel tap and immediately return the kit to the one of the purchase sites.
• The well owner should fill out as much information as possible on the forms.
• These test kits WILL NOT be analyzed for compounds that may be in your water due to a spill or environmental release.

If you think there may be a problem with your well:

• If you have questions about the construction of your well or need a contractor to repair or replace the well please contact DNREC’s Division of Water Contacts – DNREC (delaware.gov).
• If you believe your well has been impacted by a spill or environmental release, contact How Can We Help? – DNREC (delaware.gov).
• Consider using bottled water for drinking and cooking until you have contacted the Office of Drinking Water or DNREC.
• For well water remediation, contact the office of Health Systems Protection

For more information on water test kits for private well owners please contact:

• Environmental Health Field Services Office
• Delaware Public Health Laboratory
• Health Systems Protection Section Home Page – Delaware Health and Social Services – State of Delaware

Return to Environmental Laboratory home page.

Return to the Delaware Public Health Laboratory home page.

This page was last updated 4/24

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