Tap Water Quality Report
Tap water quality in TINLEY PARK, Illinois
Tap water in TINLEY PARK, Illinois receives a grade of D (69/100) from TapWaterSafety.org. It's served by TINLEY PARK. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in TINLEY PARK's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving 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.
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.
Recommended filters for TINLEY PARK
Filters matched to the specific contaminants in TINLEY PARK's 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.
All contaminants detected in TINLEY PARK's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from TINLEY PARK.