Tap Water Quality Report
Tap water quality in SKOKIE, Illinois
Tap water in SKOKIE, Illinois receives a grade of F (55/100) from TapWaterSafety.org. It's served by SKOKIE. The most significant water quality concerns are: PFAS contamination; 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 SKOKIE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving SKOKIE.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS)*, Perfluorooctanoic acid (PFOA)* detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 18.9 ppb, 315x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 29.4 ppb, 196x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 9.71 ppb, 162x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for SKOKIE (system ID IL0312880) 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 Revisions | Missed reporting | 07/02/2025 | Open |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2025 | Open |
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 04/11/2024 | 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 SKOKIE
Filters matched to the specific contaminants in SKOKIE's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
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 SKOKIE'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 |
18.9 ppb | 0.06 | — | — | — | — | — | 315× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
29.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 196× over |
| Bromodichloromethane Disinfection byproduct |
9.71 ppb | 0.06 | — | — | — | — | — | 162× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
11.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 116× over |
| Dibromochloromethane Disinfection byproduct |
5.4 ppb | 0.1 | — | — | — | — | — | 54× over |
| Trichloroacetic acid Disinfection byproduct |
5.05 ppb | 0.1 | — | — | — | — | — | 50× over |
| Chloroform Disinfection byproduct |
14.3 ppb | 0.4 | — | — | — | — | — | 36× over |
| Dibromoacetic acid Disinfection byproduct |
1.02 ppb | 0.03 | — | — | — | — | — | 34× over |
| Dichloroacetic acid Disinfection byproduct |
5.31 ppb | 0.2 | — | — | — | — | — | 27× over |
| Perfluorooctanoic acid (PFOA)* PFAS |
1.97 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 22× over |
| Radium, combined (-226 and -228)* Radiological |
1.02 pCi/L | 0.05 | 5.0 | — | — | — | — | 20× over |
| Chromium (hexavalent) Heavy metal |
0.193 ppb | 0.02 | — | — | — | — | — | 9.6× over |
| Perfluorooctane sulfonate (PFOS)* PFAS |
1.84 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 6.1× over |
| Nitrate* Inorganic |
0.35 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.5× over |
| Nitrate and nitrite* Inorganic |
0.3 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.1× over |
| Bromoform* Disinfection byproduct |
0.382 ppb | 0.5 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0175 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Barium* Heavy metal |
21.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
0.775 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.19 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
0.225 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.121 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0635 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.119 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride* Inorganic |
0.664 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 SKOKIE.