Public water system · IL0312190
ActiveOak Forest
Community water system in Cook County, Illinois, drawing primarily on purchased surface water.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
27,478
Service connections
8,497
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | 4H | 5200 | No | Unaddressed |
| 2025-07-01 | 72 | 7000 | No | Unaddressed |
| 2020-12-30 | 66 | 5000 | No | Resolved |
| 2019-07-01 | 71 | 7000 | No | Resolved |
| 2016-07-01 | 71 | 7000 | No | Resolved |
| 2009-07-01 | 71 | 7000 | No | Resolved |
| 2008-09-03 | 72 | 7000 | No | Resolved |
| 1977-06-30 | 03 | 4000 | No | Archived |
Oak Forest: frequently asked questions
Is Oak Forest's water safe to drink?
Oak Forest 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 Forest?
Oak Forest (PWSID IL0312190) is a local government-owned community water system, regulated by the IL state drinking water program.
How many people does Oak Forest serve?
Oak Forest reports serving 27,478 people through 8,497 service connections in Cook County, Illinois.
Where does Oak Forest 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 |