Illinois well water / Radon
Radon in Illinois private well water
If your Illinois well water test shows radon, compare the number to common health and aesthetic benchmarks, then confirm next steps with a certified lab or local professional.
Plain-English interpretation
Radon in water can add to indoor air radon when water is used.
Test indoor air radon first and consult state radon guidance if water radon is elevated.
What Illinois homeowners should check
- Confirm the exact unit on the lab report before comparing limits.
- Retest health-related contaminants with a certified lab before major treatment purchases.
- Keep a copy of each report for home sale, rental, and treatment service records.
- Set an annual reminder for bacteria and nitrate testing.
Treatment discussions
- Aeration
- Granular activated carbon
- Indoor air mitigation
Related Illinois well water guides
Nitrate
High nitrate can be dangerous for infants and pregnant people.
Arsenic
Long-term arsenic exposure is linked to cancer and other chronic health risks.
Lead
Lead is especially harmful for children and pregnancy, even at low levels.
Total Coliform
Coliform bacteria indicate a possible pathway for contamination into the well.
E. coli
E. coli suggests fecal contamination and can cause acute illness.
pH
Low pH can corrode plumbing; high pH can cause scale and taste issues.
Keep your well history
Interpret once on the web. Track forever in the app.
Save test history, set annual reminders, compare results over time, and create a shareable report for your family or water professional.
Track Radon results in the app