Photo: David Wilson · CC BY 2.0Living in Prairie du Rocher, IL: what to set up and who to call
The Prairie Du Rocher water system reported one health-based violation to EPA in the last five years: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. Two school districts split the grades in Prairie du Rocher: Chester Non-High School District 122 and Prairie du Rocher Community Consolidated School District 134.
I’m new in town
What to set up in Prairie du Rocher, 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 Prairie du Rocher.
Power comes from Ameren Illinois Company
Ameren Illinois Company (Ameren Illinois Company), an investor-owned utility, serves all of Prairie du Rocher. Its homes paid an average of 16.7¢ per kWh in 2025, about $148 a month (its average across Illinois, for customers on its standard service). Illinois lets you buy power from another supplier; 45% of Ameren Illinois Company’s home customers do, and Ameren Illinois Company still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Prairie Du Rocher water system
The Prairie Du Rocher water system supplies almost all of Prairie du Rocher. It buys treated ground water (EPA lists Ruma as seller) and serves 759 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. 78% of the 5,327 systems serving 501–1,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 7.0 ppb, below the 15 ppb action level that applied. That’s higher than 96% 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. IL1570400.
1 home internet providers serve Prairie du Rocher
60% of 262 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Harrisonville Telephone Company | DSL, Fiber | 100% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Prairie du Rocher’s trash rules yet
Pickup rules, the dump and recycling in Prairie du Rocher.
Where your child goes to school
Public school districts and the school path by grade.
Prairie du Rocher is in two districts that split the grades: Chester Non-High School District 122 and Prairie du Rocher Community Consolidated School District 134.
Test scores and every school: see 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.
Prairie du Rocher is in ZIP code 62277
ZIP codes where Prairie du Rocher residents live, with the share of the town in each.
| ZIP | Post office name | Share of Prairie du Rocher | ZIP’s residents in Prairie du Rocher |
|---|---|---|---|
| 62277 | Prairie Du Rocher, IL | 100% | 45% |
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 Prairie du Rocher
Who supplies Prairie du Rocher’s drinking water, and has it had violations?
The Prairie Du Rocher water system (EPA ID IL1570400). It reported 1 health-based violation to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions). 78% of systems its size had none. Its latest lead 90th percentile was 7.0 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Prairie du Rocher?
Ameren Illinois Company (Ameren Illinois Company), an investor-owned utility. Its homes paid about 16.7¢ per kWh in 2025 (EIA).
What internet providers serve Prairie du Rocher?
Harrisonville Telephone Company (FCC, as of December 2025).
What ZIP codes are in Prairie du Rocher?
62277. Census 2020 ZIP Code Tabulation Areas.
What school district is Prairie du Rocher in?
Chester Non-High School District 122 and Prairie du Rocher Community Consolidated School District 134.
How do I register to vote in Prairie du Rocher?
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 Randolph 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.