Tap Water Quality Report
Tap water quality in EAST ST LOUIS, Illinois
Tap water in EAST ST LOUIS, Illinois receives a grade of F (59/100) from TapWaterSafety.org. It's served by IL AMERICAN-EAST ST LOUIS. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in EAST ST LOUIS's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving EAST ST LOUIS.
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 20.6 ppb, 343x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 19.3 ppb, 193x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 27.7 ppb, 185x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.4 ppb.
EPA compliance record
Official U.S. EPA records for IL AMERICAN-EAST ST LOUIS (system ID IL1635040) for the last 3 years. Checked 2026-10-07.
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 EAST ST LOUIS
Filters matched to the specific contaminants in EAST ST LOUIS'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.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 EAST ST LOUIS'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 |
20.6 ppb | 0.06 | — | — | — | — | — | 343× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
19.3 ppb | 0.1 | 60.0 | 60 | — | — | — | 193× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
27.7 ppb | 0.15 | 80.0 | 100 | — | — | — | 185× over |
| Arsenic Heavy metal |
0.4 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 100× over |
| Bromodichloromethane Disinfection byproduct |
4.72 ppb | 0.06 | — | — | — | — | — | 79× over |
| Trichloroacetic acid Disinfection byproduct |
7.15 ppb | 0.1 | — | — | — | — | — | 71× over |
| Dichloroacetic acid Disinfection byproduct |
11.7 ppb | 0.2 | — | — | — | — | — | 59× over |
| Chloroform Disinfection byproduct |
22.6 ppb | 0.4 | — | — | — | — | — | 57× over |
| Nitrate Inorganic |
2.96 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 21× over |
| Nitrate and nitrite Inorganic |
2.96 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 21× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.34 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 15× over |
| Radium, combined (-226 and -228) Radiological |
0.59 pCi/L | 0.05 | 5.0 | — | — | — | — | 12× over |
| Dibromoacetic acid Disinfection byproduct |
0.18 ppb | 0.03 | — | — | — | — | — | 6.0× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.57 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 5.2× over |
| Dibromochloromethane Disinfection byproduct |
0.358 ppb | 0.1 | — | — | — | — | — | 3.6× over |
| Chromium (hexavalent) Heavy metal |
0.0483 ppb | 0.02 | — | — | — | — | — | 2.4× over |
| Atrazine Pesticide/Herbicide |
0.17 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| 1,4-Dioxane Semi-volatile organic compound |
0.248 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
19.8 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
1.79 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
5.97 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
1.96 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
13.6 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.293 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
1.85 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.05 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.18 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.129 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 2-Methoxyethanol Other |
0.075 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.758 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
5.6 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 IL AMERICAN-EAST ST LOUIS.