Water Quality Report · Updated October 07, 2026
TINLEY PARK
TINLEY PARK delivers tap water graded C (69/100) by TapWaterSafety.org. The utility serves approximately 56,703 residents in TINLEY PARK, Illinois using surface water (purchased). The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromodichloromethane significantly above health guideline. For questions, the utility can be reached at 708-444-5530.
Is TINLEY PARK tap water safe to drink?
TINLEY PARK delivers tap water that earns a grade of C (69/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 56,703 residents in TINLEY PARK, drawing from surface water (purchased).
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Bromodichloromethane, Haloacetic acids (HAA5), Trichloroacetic acid, Dibromochloromethane, Chloroform, Dibromoacetic acid, Dichloroacetic acid, Chromium (hexavalent). For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for TINLEY PARK (system ID IL0314910) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Consumer Confidence Rule | Other (e.g. public notice) | 07/01/2025 | Open |
| Lead and Copper Rule | Missed testing or reporting | 10/01/2024 | Open |
| Lead and Copper Rule Revisions | Missed reporting | 07/02/2025 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for TINLEY PARK residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for TINLEY PARK.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 23.0 ppb, 383x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 35.6 ppb, 238x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 9.97 ppb, 166x above the EWG health guideline of 0.06 ppb.
Contact TINLEY PARK
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for TINLEY PARK
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 69/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
23.0 ppb | 0.06 | — | — | — | — | — | 383× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
35.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 238× over |
| Bromodichloromethane Disinfection byproduct |
9.97 ppb | 0.06 | — | — | — | — | — | 166× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
15.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 151× over |
| Trichloroacetic acid Disinfection byproduct |
6.22 ppb | 0.1 | — | — | — | — | — | 62× over |
| Dibromochloromethane Disinfection byproduct |
5.76 ppb | 0.1 | — | — | — | — | — | 58× over |
| Chloroform Disinfection byproduct |
19.9 ppb | 0.4 | — | — | — | — | — | 50× over |
| Dibromoacetic acid Disinfection byproduct |
1.3 ppb | 0.03 | — | — | — | — | — | 43× over |
| Dichloroacetic acid Disinfection byproduct |
7.18 ppb | 0.2 | — | — | — | — | — | 36× over |
| Chromium (hexavalent) Heavy metal |
0.199 ppb | 0.02 | — | — | — | — | — | 10× over |
| Molybdenum Other |
1.09 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.27 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.234 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.156 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Manganese* Heavy metal |
0.0613 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.12 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 2-propen-1-ol * Other |
0.15 ppb | — | — | — | — | — | — | Below guideline |
| Quinoline* Other |
0.00488 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
TINLEY PARK service area
This water system serves 1 community in Cook County, Illinois. Click any city for its dedicated tap water quality page.
Find the right filter for TINLEY PARK water
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