Photo: Infrogmation of New Orleans · CC BY 3.0Living in Mandeville, LA: what to set up and who to call
Most mail in Mandeville goes to 70448 (53% of residents), one of 2 ZIP codes in town. St. Tammany Parish School District runs the public schools in Mandeville.
I’m new in town
What to set up in Mandeville, 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 Mandeville.
Power comes from Cleco Power
Cleco Power (Cleco Power LLC), an investor-owned utility, serves all of Mandeville. Its homes paid an average of 14.3¢ per kWh in 2025, about $178 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 City of Mandeville Water Supply
City of Mandeville Water Supply supplies Mandeville: about 88% of residents live in its service area. Beau Chene Water System serves another 8%. About 6% 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 13,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 1.0 ppb, below the 15 ppb action level that applied. That’s lower than 59% 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. LA1103023.
6 home internet providers serve Mandeville
99% of 4,877 addresses can get 100/20 Mbps; 84% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| AT&T | DSL, Fiber, Fixed wireless | 95% | 5,000/5,000 |
| Spectrum | Cable, Fiber | 94% | 1,000/35 |
| Vexus Fiber | Fiber | 52% | 1,000/1,000 |
| REV | Fiber | 4% | 1,000/1,000 |
| Verizon | Fixed wireless | 80% | 300/20 |
| T-Mobile | Fixed wireless | 58% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Mandeville’s trash rules yet
Pickup rules, the dump and recycling in Mandeville.
Where your child goes to school
Public school districts and the school path by grade.
Mandeville is in St. Tammany Parish School District.
A−School 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 Aug 2015; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Mandeville spans 2 ZIP codes
ZIP codes where Mandeville residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mandeville | ZIP’s residents in Mandeville |
|---|---|---|---|
| 70448 | Mandeville, LA | 53% | 27% |
| 70471 | Mandeville, LA | 47% | 27% |
70470 is P.O. box or single-organization ZIP with no homes.
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 Mandeville
Who supplies Mandeville’s drinking water, and has it had violations?
City of Mandeville Water Supply (EPA ID LA1103023). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Mandeville?
Cleco Power (Cleco Power LLC), an investor-owned utility. Its homes paid about 14.3¢ per kWh in 2025 (EIA).
What internet providers serve Mandeville?
AT&T, Spectrum, Vexus Fiber, REV, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Mandeville?
70448 (53%), 70471 (47%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Mandeville in?
St. Tammany Parish School District.
How do I register to vote in Mandeville?
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 Tammany 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.