Photo: AlphaBeta135 · CC BY 4.0Living in Knollwood, IL: what to set up and who to call
Knollwood has no town government of its own, so Lake County runs its elections and most services, and its children attend Lake Bluff Elementary School District 65. The Lake Bluff water system has a clean five-year EPA record, but its latest lead result, 5.1 ppb, was higher than 92% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Knollwood, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Knollwood.
Power comes from Commonwealth Edison
Commonwealth Edison (Commonwealth Edison Co), an investor-owned utility, serves all of Knollwood. Its homes paid an average of 17.7¢ per kWh in 2025, about $107 a month (its average across Illinois, for customers on its standard service). Illinois lets you buy power from another supplier; 20% of Commonwealth Edison’s home customers do, and Commonwealth Edison still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Lake Bluff water system
The Lake Bluff water system supplies Knollwood: about 84% of residents live in its service area. Lake Bluff Estates MHP serves another 6%. About 10% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Lake Forest and Central Lake County Jawa as sellers) and serves 5,600 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2026, was 5.1 ppb, below the 15 ppb action level that applied. The highest in five years was 9.0 ppb. That’s higher than 92% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0 (EPA’s estimate). Violations are counted by the start of their compliance period. IL0970750.
4 home internet providers serve Knollwood
100% of 687 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 98% | 2,000/250 |
| AT&T | DSL, Fixed wireless, Fiber | 96% | 100/20 |
| Verizon | Fixed wireless | 96% | 300/20 |
| T-Mobile | Fixed wireless | 94% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Knollwood’s trash rules yet
Pickup rules, the dump and recycling in Knollwood.
Where your child goes to school
Public school districts and the school path by grade.
Knollwood is in two districts that split the grades: Lake Bluff Elementary School District 65 and Lake Forest Community High School District 115.
A+School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Knollwood is unincorporated, so Lake County is the local government.
Election office: FVAP local election office directory, updated Jul 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Knollwood is in ZIP code 60044
ZIP codes where Knollwood residents live, with the share of the town in each.
| ZIP | Post office name | Share of Knollwood | ZIP’s residents in Knollwood |
|---|---|---|---|
| 60044 | Lake Bluff, IL | 100% | 21% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Knollwood
Who supplies Knollwood’s drinking water, and has it had violations?
The Lake Bluff water system (EPA ID IL0970750). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 5.1 ppb (Jan–Jun 2026), against a 15 ppb action level.
Who provides electricity in Knollwood?
Commonwealth Edison (Commonwealth Edison Co), an investor-owned utility. Its homes paid about 17.7¢ per kWh in 2025 (EIA).
What internet providers serve Knollwood?
Xfinity, AT&T, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Knollwood?
60044. Census 2020 ZIP Code Tabulation Areas.
What school district is Knollwood in?
Lake Bluff Elementary School District 65 and Lake Forest Community High School District 115.
How do I register to vote in Knollwood?
In Illinois you can register online until 16 days before Election Day, in person up to and including Election Day, or by mail (postmarked 28 days before). Elections here are run by the Lake County Clerk. Check your registration at ova.elections.il.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Sep 12, 2025 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.