Is Darien, IL Tap Water Safe to Drink?
Darien, IL tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Contaminants including lithium have been detected at or below guideline thresholds.
Where Does Darien Get Its Water?
Water in Darien, IL is provided by 3 public water systems: DARIEN, SOUTHEAST REGIONAL WATER FACILITY and IL AMERICAN-WEST SUBURBAN.
How Is Darien Tap Water Treated?
Treated water is disinfected using chloramines and free chlorine. Treatment includes conventional treatment (coagulation, flocculation, and filtration).
What's in Darien Tap Water?
The following contaminants were detected most frequently in Darien public water systems. All detected levels fall at or below EPA health guidelines in this dataset.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 9 µg/L | — | 0 ZIPs | Within guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| 8:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 11Cl-PF3OUdS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 6:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for Darien
Current EPA monitoring data for Darien shows contaminant levels within guideline thresholds across all ZIP codes in this dataset. As with all public water systems, sensitive populations may choose to use a certified filter for additional peace of mind.
Best Broad-Spectrum Filters for This Water Profile
This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about Darien Tap Water
Is Darien tap water safe to drink?
Darien tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Sensitive populations may still choose to use a certified filter as a precaution.
What contaminants are in Darien tap water?
The most commonly detected contaminants in Darien water systems include: lithium, PFTrDA, 8:2 FTS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Darien get its drinking water?
Darien receives water from 3 public water systems, including DARIEN.
Do I need a water filter in Darien?
Current data does not show guideline exceedances in Darien. A certified filter can still reduce trace contaminants and improve taste for households that prefer filtered water.
How often is Darien tap water tested?
Public water systems in Darien are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-09-08.
Tap water reports by ZIP in Darien
- 60561 - Darien tap water report Some concern
Water utilities serving Darien, IL
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- SOUTHEAST REGIONAL WATER FACILITYAction advised
- DARIENLooks OK
- GLEN ELLYN HEIGHTS SUBDIVISIONNo recent federal sampling
- STEEPLE RUN SBDVNo recent federal sampling
Also covers / overlaps with
- Downers Grove, IL · Township