Living in Grand Coteau, LA: what to set up and who to call
An EPA health-based violation from 2024 is still open for Town of Grand Coteau Water System, and its latest lead result (5.0 ppb) was higher than 92% of similar systems’, though under the 15 ppb action level. Power in Grand Coteau comes from Southwest Louisiana E M C, a cooperative utility rather than a private company.
I’m new in town
What to set up in Grand Coteau, 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 Grand Coteau.
Power comes from Southwest Louisiana E M C
Southwest Louisiana E M C (Southwest Louisiana E M C), a cooperative utility, serves all of Grand Coteau. Its homes paid an average of 11.6¢ per kWh in 2025, about $162 a month (its average across Louisiana).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Town of Grand Coteau Water System
Town of Grand Coteau Water System supplies Grand Coteau: about 83% of residents live in its service area. About 17% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water (EPA lists Town of Sunset Water System as seller) and serves 1,650 people in all.
10 health-based violations reported to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule) ×9, a lead and copper treatment requirement (Lead and Copper Rule Revisions), the latest beginning Mar 2025. 78% of the 7,966 systems serving 1,001–3,300 people had none. 1 older violation is still open, since 2024: a lead and copper treatment requirement (Lead and Copper Rule Revisions), per EPA’s records.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2026, was 5.0 ppb, below the 15 ppb action level that applied. The highest in five years was 7.0 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. LA1097001.
6 home internet providers serve Grand Coteau
100% of 388 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Allens Communications | Fiber, Cable | 100% | 1,000/1,000 |
| Spectrum | Fiber, Cable | 37% | 1,000/1,000 |
| AT&T | Fixed wireless, DSL, Fiber | 11% | 100/20 |
| Brightspeed | DSL, Fiber | 7% | 2,000/2,000 |
| Acadianabroadband | Fixed wireless | 55% | 40/10 |
| T-Mobile | Fixed wireless | 22% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Grand Coteau’s trash rules yet
Pickup rules, the dump and recycling in Grand Coteau.
Where your child goes to school
Public school districts and the school path by grade.
Grand Coteau is in St. Landry Parish School District.
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 Aug 2015; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Grand Coteau spans 4 ZIP codes
ZIP codes where Grand Coteau residents live, with the share of the town in each.
| ZIP | Post office name | Share of Grand Coteau | ZIP’s residents in Grand Coteau |
|---|---|---|---|
| 70541 | Grand Coteau, LA | 94% | 100% |
| 70512 | Arnaudville, LA | 3% | 0% |
| 70584 | Sunset, LA | 1% | 0% |
| 70570 | Opelousas, LA | 1% | 0% |
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 Grand Coteau
Who supplies Grand Coteau’s drinking water, and has it had violations?
Town of Grand Coteau Water System (EPA ID LA1097001). It reported 10 health-based violations to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule) ×9, a lead and copper treatment requirement (Lead and Copper Rule Revisions). 78% of systems its size had none. Its latest lead 90th percentile was 5.0 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Grand Coteau?
Southwest Louisiana E M C (Southwest Louisiana E M C), a cooperative utility. Its homes paid about 11.6¢ per kWh in 2025 (EIA).
What internet providers serve Grand Coteau?
Allens Communications, Spectrum, AT&T, Brightspeed, Acadianabroadband, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Grand Coteau?
70541 (94%), 70512 (3%), 70584 (1%), 70570 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Grand Coteau in?
St. Landry Parish School District.
How do I register to vote in Grand Coteau?
In Louisiana you can register online until 20 days before Election Day, in person until 30 days before Election Day, or by mail (postmarked 30 days before). Elections here are run by the St Landry Parish Registrar of Voters. Check your registration at voterportal.sos.la.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 Aug 3, 2026 (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.