Tap Water Quality Report
Tap water quality in ROCKFORD, Illinois
Tap water in ROCKFORD, Illinois receives a grade of D (68/100) from TapWaterSafety.org. It's served by ROCKFORD. The most significant water quality concerns are: Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in ROCKFORD's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving ROCKFORD.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.951 ppt, 951x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 4.72 ppb, 79x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.278 ppb, 70x above the EWG health guideline of 0.004 ppb.
Recommended filters for ROCKFORD
Filters matched to the specific contaminants in ROCKFORD's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 ROCKFORD'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.951 ppt | 0.001 | 10.0 | — | — | — | — | 951× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
4.72 ppb | 0.06 | — | — | — | — | — | 79× over |
| Arsenic Heavy metal |
0.278 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 70× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
9.46 ppb | 0.15 | 80.0 | 100 | — | — | — | 63× over |
| Radium, combined (-226 and -228) Radiological |
2.47 pCi/L | 0.05 | 5.0 | — | — | — | — | 49× over |
| Bromodichloromethane Disinfection byproduct |
2.4 ppb | 0.06 | — | — | — | — | — | 40× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
1.88 ppb | 0.1 | 60.0 | 60 | — | — | — | 19× over |
| Chloroform Disinfection byproduct |
6.22 ppb | 0.4 | — | — | — | — | — | 16× over |
| Dibromochloromethane Disinfection byproduct |
0.829 ppb | 0.1 | — | — | — | — | — | 8.3× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.466 ppb | 0.06 | 5.0 | — | — | — | — | 7.8× over |
| Trichloroacetic acid Disinfection byproduct |
0.678 ppb | 0.1 | — | — | — | — | — | 6.8× over |
| Dichloroacetic acid Disinfection byproduct |
0.938 ppb | 0.2 | — | — | — | — | — | 4.7× over |
| 1,4-Dioxane Semi-volatile organic compound |
1.5 ppb | 0.35 | — | — | 50 | 1 | — | 4.3× over |
| Chromium (hexavalent) Heavy metal |
0.0762 ppb | 0.02 | — | — | — | — | — | 3.8× over |
| Nitrate and nitrite Inorganic |
0.482 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.4× over |
| Nitrate Inorganic |
0.377 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.7× over |
| Manganese Heavy metal |
57.9 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Pentachlorophenol Other |
0.16 ppb | 0.3 | 1.0 | — | — | — | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.205 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Barium Heavy metal |
155.2 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.307 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0277 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.964 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
3.25 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.94 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.267 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.296 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Vanadium Other |
0.149 ppb | 21.0 | — | — | — | — | — | Below guideline |
| trans-1,2-Dichloroethylene Volatile organic compound |
0.12 ppb | 60.0 | 100.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
1.01 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.361 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.126 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.052 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| 1,1,1-Trichloroethane Other |
0.119 ppb | — | 200.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.00354 ppb | — | — | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
2.31 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.699 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Testosterone Other |
0.003 ppt | — | — | — | — | — | — | 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 ROCKFORD.