Photo: Ken Lund from Reno, Nevada, USA · CC BY-SA 2.0Living in Diamond, IL: what to set up and who to call
Tap water in Diamond comes from the Diamond water system, which has a clean five-year EPA record (about 22% of systems its size had a health-based violation) and a latest lead result below detection. Most homes in Diamond have two wired internet choices, Xfinity and Surf Internet.
I’m new in town
What to set up in Diamond, 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 Diamond.
Power comes from Commonwealth Edison
Commonwealth Edison (Commonwealth Edison Co), an investor-owned utility, serves all of Diamond. 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 Diamond water system
The Diamond water system supplies Diamond: about 96% of residents live in its service area. About 4% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 2,508 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.3 ppb. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. IL0630250.
7 home internet providers serve Diamond
100% of 931 addresses can get 100/20 Mbps; 77% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 100% | 1,200/35 |
| Surf Internet | Fiber | 75% | 1,000/1,000 |
| AT&T | Fixed wireless, DSL | 9% | 25/3 |
| Watch Communications | Fixed wireless | 90% | 100/20 |
| Verizon | Fixed wireless | 80% | 25/6 |
| T-Mobile | Fixed wireless | 69% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Diamond’s trash rules yet
Pickup rules, the dump and recycling in Diamond.
Where your child goes to school
Public school districts and the school path by grade.
Most of Diamond (67%) is in Coal City Community Unit School District 1; parts are in Reed Custer Community Unit School District 255U (25%) and Wilmington Community Unit School District 209U (9%).
ASchool gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Diamond is in ZIP code 60416
ZIP codes where Diamond residents live, with the share of the town in each.
| ZIP | Post office name | Share of Diamond | ZIP’s residents in Diamond |
|---|---|---|---|
| 60416 | Coal City, IL | 100% | 28% |
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 Diamond
Who supplies Diamond’s drinking water, and has it had violations?
The Diamond water system (EPA ID IL0630250). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Diamond?
Commonwealth Edison (Commonwealth Edison Co), an investor-owned utility. Its homes paid about 17.7¢ per kWh in 2025 (EIA).
What internet providers serve Diamond?
Xfinity, Surf Internet, AT&T, Watch Communications, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Diamond?
60416. Census 2020 ZIP Code Tabulation Areas.
What school district is Diamond in?
Coal City Community Unit School District 1. Parts of the city are in Reed Custer Community Unit School District 255U and Wilmington Community Unit School District 209U.
How do I register to vote in Diamond?
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 Grundy 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.