Public water system · IL0312220
ActiveOak Lawn
Community water system in Cook County, Illinois, drawing primarily on purchased surface water.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
58,362
Service connections
16,766
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | 72 | 7000 | No | Unaddressed |
| 2023-07-01 | 72 | 7000 | No | Resolved |
| 2022-12-30 | 66 | 5000 | No | Resolved |
| 2016-07-01 | 72 | 7000 | No | Resolved |
| 2015-09-01 | 24 | 3100 | No | Resolved |
| 2015-07-01 | 27 | 0999 | No | Resolved |
| 2000-09-01 | 24 | 3100 | No | Archived |
| 1997-08-01 | 26 | 3100 | No | Archived |
| 1993-01-01 | 65 | 5000 | Yes | Resolved |
| 1992-12-07 | 57 | 5000 | Yes | Resolved |
Oak Lawn: frequently asked questions
Is Oak Lawn's water safe to drink?
Oak Lawn is an active community water system regulated under the Safe Drinking Water Act, overseen by the IL state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Oak Lawn?
Oak Lawn (PWSID IL0312220) is a local government-owned community water system, regulated by the IL state drinking water program.
How many people does Oak Lawn serve?
Oak Lawn reports serving 58,362 people through 16,766 service connections in Cook County, Illinois.
Where does Oak Lawn get its water?
EPA SDWIS lists this system's primary water source as purchased surface water.
Other water systems in Cook County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Chicago | Cook | 2,746,388 | Community | Surface water |
| Cicero | Cook | 83,000 | Community | Purchased surface water |
| Schaumburg | Cook | 75,750 | Community | Purchased surface water |
| Evanston | Cook | 74,486 | Community | Surface water |
| Arlington Heights | Cook | 73,320 | Community | Purchased surface water |
| Palatine | Cook | 70,875 | Community | Purchased surface water |