​While regular testing of private residential water wells is not required, KCHD recommends testing for bacteria (known as a total coliforms test) and nitrate/nitrite every year and testing for metals every 3 years.

Once water sample is collected, take the sample to the DuPage County Health Department Environmental Water Lab. Complete instructions on water collection and submission are on the form that we provide when you pick up the water bottle testing kit. Sample must be collected in the bottles that we provide or it will not be tested. See the DuPage County Health Department Environmental Health Fees page for more information. 

 

If a well-owner has completed testing and found no contaminants, wells should still be inspected every year to make sure the well remains sealed and clear of debris, including yard waste. Look for damage to the well cap and cracks in the above-ground portion of the well casing. It is also important for those on wells to maintain their septic system by following these guidelines:

• Do not dispose of kitchen grease or household chemicals in the sink

• Do not flush personal hygiene products besides toilet paper

• Pump septic tanks every three to five years

Keep a file for your well which includes information on well depth (usually available in a well log, which may be available from the local health department), service records, emergency instructions, and contact information for the local health department and drilling contractor.​

Learn More About Your Well

The Private Well Class program is a free, self-paced course presented in 10 weekly lessons via email. The class familiarizes well-owners with the basic science of wells and the best practices they can use to maintain their well and protect their water supply. The class also presents opportunities for additional free learning through online videos and live webinars. Enroll in the online Private Well Class here​. To receive your lessons in hard copy, call 1-866-522-2681 or email info@privatewellclass.org.