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Environmental Health:
Wells and Onsite Wastewater Treatment Systems

If you have any questions or concerns please contact us at 309-679-6161 or


The Environmental Health Division strives to prevent waterborne illness transmission and contraction by:

  • Reviewing plans and issuing permits for private wells.
  • Issuing permits and conducting inspections for closed loop wells.
  • Inspecting new or repaired water well systems.
  • Ensuring proper sealing of abandoned wells.
  • Sampling private and non-community water wells.
  • Investigating complaints.
  • Providing water testing kits ($15)

Protect Your Drinking Water. Proper Care and Maintenance of a Water Well Brochure

Available Testing Kits:

The water test kits are available from the health department test for coliform and E. coli bacteria, nitrates, and nitrites. Test kits may be purchased in our office for $15. Test results will be received by our office in 7 to 10 days, after which we will inform the homeowner of the results through the mail.

Water Well Contaminates: Coliform Bacteria

Water Well Contaminates: Nitrates

Abandoned Wells:

State regulations require abandoned wells to be sealed because they are a threat to groundwater supplies and a safety hazard to children, animals, and adults who are unaware of the opening or insecure covering on the well or it is level to the ground. Because of these openings, an abandoned well on your property may be an entryway for pollution to reach your current well. Property owners that have an abandoned well(s) on their property should contact a licensed water well contractor to have the well sealed in accordance with state code.

For more information regarding sealing an abandoned or old well, please speak with one of our environmental health inspectors by calling 309/679-6161.

Abandoned Well Information


Onsite Wastewater Treatment Systems

The Environmental Health Division's goal is to prevent disease, nuisances, and eliminate improperly treated sewage by:

  • Reviewing applications and plans as well as issuing permits.
  • Inspecting disposal systems for proper installation or repair.
  • Requiring anyone constructing, altering, or extending a private sewage disposal system to have a valid permit issued by the Health Department.
  • Providing information about construction, operation, and maintenance to citizens and contractors.

Homeowner Onsite Wastewater Educational Program

Tips for Taking Care of Your Onsite Wastewater Treatment System:

  • Know where your septic and drain field are located. Keep a sketch with your maintenance records.
  • Inspect your septic tank every year.
  • Have your system inspected/repaired if you have any problems.
  • Conserve water to avoid overloading the system.
  • Have your tank pumped every 2 to 3 years by a licensed septic pumper.
  • Divert other water sources like gutters, footing drains, water softeners, sump pumps, and lawn irrigation systems away from the septic system.
  • Do not park or drive cars over your drain field.
  • Do not dig in your septic system.
  • Do not use septic tank additives (these do not help and sometimes can be harmful to your system).
  • Be careful what you flush into your septic tank. Harsh chemicals/cleansers can kill the beneficial bacteria that help treat waste water.
  • Maintain chlorinator (if applicable).

Proper Care and Maintenance of Onsite Wastewater Treatment Systems brochure

Do NOT flush down drains if an Onsite Wastewater Treatment System is in use:

  • Prescription drugs
  • Coffee grounds
  • Dental floss
  • Disposable diapers
  • Kitty litter
  • Sanitary napkins
  • Tampons
  • Cigarette butts
  • Condoms
  • Fat, grease, or oil
  • Paper towels
  • Food scraps
  • Paints
  • Varnishes
  • Thinners
  • Waste oils
  • Photographic solutions
  • Pesticides
  • Gasoline

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