Tap Water Results

Is Elmhurst, IL tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for Elmhurst Water System. 1 PFAS were detected below the limits.

2 public water systems serve parts of Elmhurst. The largest, Elmhurst Water System, serves 45,000 people. Your water bill names your system.

Largest system

Elmhurst Water System

45,000 people · Purchased surface water · EPA ID IL0430350

Buys treated water from Berkeley Water System, Villa Park Water System, Oak Brook Water System, Du Page Water Commission.

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 5.52 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across Illinois, 13 of 479 water systems EPA tested had PFAS above a 2024 federal limit, and 18 systems were above the lead action level in results from the last five years. Illinois results.

Elmhurst homes and lead pipes

64%
of homes built before 1980 (Illinois 64%, US 50%)
21%
built before 1950 (Illinois 26%)
20%
of households rent (Illinois 33%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Elmhurst city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Elmhurst

  • Illinois American Water – Country Club
    1,014 people · Purchased surface water · Illinois · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Lombard 4 mi
Lombard Water System
Lombard Water SystemNone above limits10.6 ppb
Addison 4 mi
Addison Water System
Addison Water SystemNone above limits2 ppb
Glen Ellyn 6 mi
Glen Ellyn Water System
Glen Ellyn Water SystemNone above limits1.87 ppb
Glendale Heights 7 mi
Glendale Heights Water System
Glendale Heights Water SystemNone above limits0 ppb
Elk Grove Village 8 mi
Elk Grove Village Water System
Elk Grove Village Water SystemNone above limits0 ppb
Oak Park 8 mi
Oak Park Water System
Oak Park Water SystemNone above limits4.52 ppb
Elmhurst ZIP codes (1)
  • 60126

Questions

Is Elmhurst tap water safe to drink?

Elmhurst Water System has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Elmhurst, IL?

2 public water systems serve parts of Elmhurst. The largest is Elmhurst Water System (45,000 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Elmhurst tap water have PFAS?

Elmhurst Water System had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Elmhurst homes have lead pipes?

Census estimates put 64% of Elmhurst homes as built before 1980 (Illinois: 64%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Elmhurst Water System's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.