Tap Water Quality Report
Tap water quality in ARLINGTON HEIGHTS, Illinois
Tap water in ARLINGTON HEIGHTS, Illinois receives a grade of D (69/100) from TapWaterSafety.org. It's served by ARLINGTON HEIGHTS. 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 ARLINGTON HEIGHTS's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving ARLINGTON HEIGHTS.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 21.2 ppb, 353x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 36.4 ppb, 243x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 10.7 ppb, 179x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for ARLINGTON HEIGHTS (system ID IL0314030) 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 |
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 01/14/2026 | Open |
| Volatile Organic Chemicals | Missed testing or reporting | 01/01/2024 | 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 ARLINGTON HEIGHTS
Filters matched to the specific contaminants in ARLINGTON HEIGHTS'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 ARLINGTON HEIGHTS'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 |
21.2 ppb | 0.06 | — | — | — | — | — | 353× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
36.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 243× over |
| Bromodichloromethane Disinfection byproduct |
10.7 ppb | 0.06 | — | — | — | — | — | 179× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
14.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 146× over |
| Trichloroacetic acid Disinfection byproduct |
6.23 ppb | 0.1 | — | — | — | — | — | 62× over |
| Dibromochloromethane Disinfection byproduct |
5.81 ppb | 0.1 | — | — | — | — | — | 58× over |
| Chloroform Disinfection byproduct |
19.8 ppb | 0.4 | — | — | — | — | — | 50× over |
| Dibromoacetic acid Disinfection byproduct |
1.12 ppb | 0.03 | — | — | — | — | — | 37× over |
| Dichloroacetic acid Disinfection byproduct |
6.93 ppb | 0.2 | — | — | — | — | — | 35× over |
| Chromium (hexavalent) Heavy metal |
0.186 ppb | 0.02 | — | — | — | — | — | 9.3× over |
| Chlorate Disinfection byproduct |
30.7 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
9.5 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.011 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.531 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.262 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.199 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.123 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.119 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Germanium Other |
0.268 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 ARLINGTON HEIGHTS.