Water Quality: Northbrook, IL
8 water systems • 44,654 people served
Some ConcernsWater Quality Summary
Northbrook is served by 8 public water systems with a combined service population of 44,654 people, and has 122 EPA Safe Drinking Water Act violations on record. Critically, 1 of those are health-based violation, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Northbrook's violation count is 323% above the national average for Illinois. Contaminants associated with violations include Disinfection Byproducts.
Contaminants Found
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Water Systems Serving Northbrook
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| NORTHBROOK | IL0312070 | Surface Water | 34,407 | 7 |
| OASIS MHP | IL0315185 | Groundwater | 3,000 | 54 |
| MISSION BROOK SD | IL0315920 | Surface Water | 2,852 | 2 |
| SUNSET MHP | IL0310080 | Surface Water | 1,400 | 7 |
| OAKBROOK ESTATES MHP | IL1115125 | Groundwater | 1,012 | 2 |
| HARBOR POINT ESTATES MHP | IL0317010 | Surface Water | 950 | 17 |
| CAMBRIDGE COURTS MHP | IL0971540 | Surface Water | 658 | 25 |
| WHISPERING LAKES WATER SYSTEM, INC. | IL0970220 | Groundwater | 375 | 8 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Illinois
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.