We found 3 public water systems in Arlington county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Arlington County | Arlington | 215,000 | 36 | 4 |
| National Airport | Washington | 28,055 | 31 | 4 |
| Arlington County - Willston Area | County of Arlington | 1,352 | 0 | 12 |