Tap Water Results

Is Tinley Park, 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 Tinley Park Water System.

4 public water systems serve parts of Tinley Park. The largest, Tinley Park Water System, serves 56,703 people. Your water bill names your system.

Largest system

Tinley Park Water System

56,703 people · Purchased surface water · EPA ID IL0314910

Buys treated water from Oak Lawn Water System, Orland Park Water System.

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: 0 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

Full Tinley Park Water System results

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.

Tinley Park homes and lead pipes

38%
of homes built before 1980 (Illinois 64%, US 50%)
3%
built before 1950 (Illinois 26%)
13%
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 Tinley Park village (tables B25034, B25003). Estimates for small places have a margin of error.

Which system serves your ZIP code

Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.

SystemZIP codes in Tinley Park
Tinley Park Water System
56,703 people
60477
Illinois American Water – Homer Township
24,543 people
60487

Other water systems serving Tinley Park

  • Illinois American Water – Homer Township
    24,543 people · Purchased surface water · Illinois · reported ZIPs here
    No PFAS above limits
  • Illinois American Water – Fernway
    5,521 people · Purchased surface water · Illinois · reported ZIPs here
    No PFAS above limits
  • Corinth Public Water District
    3,927 people · Purchased surface water · Illinois · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Oak Forest 4 mi
Oak Forest Water System
Oak Forest Water SystemNone above limits0 ppb
Orland Park 4 mi
Orland Park Water System
Orland Park Water SystemNone above limits0 ppb
New Lenox 9 mi
New Lenox Water System
New Lenox Water SystemNone above limits0 ppb
Chicago Heights 10 mi
Chicago Heights Water System
Chicago Heights Water SystemNone above limits5.86 ppb
Oak Lawn 10 mi
Oak Lawn Water System
Oak Lawn Water SystemNone above limits9.3 ppb
Lockport 12 mi
Illinois American Water – Homer Township
Illinois American Water – Homer TownshipNone above limits0 ppb

Questions

Is Tinley Park tap water safe to drink?

Tinley Park 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 Tinley Park, IL?

4 public water systems serve parts of Tinley Park. The largest is Tinley Park Water System (56,703 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Tinley Park tap water have PFAS?

None detected above EPA's reporting limits. Tinley Park Water System had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Tinley Park homes have lead pipes?

Census estimates put 38% of Tinley Park 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. Tinley Park 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.