Living in Marissa Township, IL: what to set up and who to call
Marissa Township spans 2 ZIP codes; 62257 holds the most residents (96%). Marissa Area Public Library District, at 212 North Main Street, is the library in town.
I’m new in town
What to set up in Marissa Township, 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 Marissa Township.
Power comes from Ameren Illinois Company
Ameren Illinois Company (Ameren Illinois Company), an investor-owned utility, serves all of Marissa Township. 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 Marissa water system
The Marissa water system supplies Marissa Township: about 77% of residents live in its service area. About 23% 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 Kaskaskia Water District as seller) and serves 1,921 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 2024, was 2.3 ppb, below the 15 ppb action level that applied. That’s higher than 76% 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. IL1630750.
6 home internet providers serve Marissa Township
88% of 1,233 addresses can get 100/20 Mbps; 75% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Sparklight | Cable | 81% | 1,000/50 |
| Frontier | Fiber, DSL | 73% | 7,000/7,000 |
| T-Mobile | Fixed wireless | 77% | 100/20 |
| AT&T | Fixed wireless | 72% | 25/3 |
| Verizon | Fixed wireless | 8% | 300/20 |
| Wisper | Fixed wireless | 2% | 400/30 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Marissa Township’s trash rules yet
Pickup rules, the dump and recycling in Marissa Township.
Where your child goes to school
Public school districts and the school path by grade.
Marissa Township is in Marissa Community Unit School District 40.
CSchool 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 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Marissa Township spans 2 ZIP codes
ZIP codes where Marissa Township residents live, with the share of the town in each.
| ZIP | Post office name | Share of Marissa Township | ZIP’s residents in Marissa Township |
|---|---|---|---|
| 62257 | Marissa, IL | 96% | 79% |
| 62255 | Lenzburg, IL | 4% | 9% |
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 Marissa Township
Who supplies Marissa Township’s drinking water, and has it had violations?
The Marissa water system (EPA ID IL1630750). 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 2.3 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Marissa Township?
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 Marissa Township?
Sparklight, Frontier, T-Mobile, AT&T, Verizon, Wisper (FCC, as of December 2025).
What ZIP codes are in Marissa Township?
62257 (96%), 62255 (4%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Marissa Township in?
Marissa Community Unit School District 40.
How do I register to vote in Marissa Township?
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 St. Clair 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.