Photo: Der-wuppertaler · CC BY-SA 3.0Living in National City, CA: what to set up and who to call
Two school districts split the grades in National City: Sweetwater Union High School District and National Elementary School District. Cox Communications and AT&T both wire most of National City; 73% of addresses can get fiber.
I’m new in town
What to set up in National City, 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 National City.
Power comes from SDG&E
SDG&E (San Diego Gas & Electric Co.), an investor-owned utility, serves all of National City. Its homes paid an average of 45.8¢ per kWh in 2025, about $168 a month (its average across California, for customers on its standard service). California lets you buy power from another supplier; 79% of SDG&E’s home customers do, and SDG&E still delivers it.
Start or move service: sempra.com
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Sweetwater Authority
Sweetwater Authority supplies almost all of National City. It draws surface water (EPA lists Cal-Am Water Coronado and City of San Diego and Otay Water District and San Diego County Water Authority as sellers) and serves 191,282 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 332 systems serving 100,001–250,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2021–Dec 2023, was 0.0 ppb, below the 15 ppb action level that applied. 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. Violations are counted by the start of their compliance period. CA3710025.
5 home internet providers serve National City
98% of 9,118 addresses can get 100/20 Mbps; 73% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Cox Communications | Cable, Fiber | 93% | 2,000/100 |
| AT&T | Fiber, DSL, Fixed wireless | 83% | 5,000/5,000 |
| Pacific Wyyerd | Fiber | 49% | 8,000/8,000 |
| Verizon | Fixed wireless | 78% | 1,000/75 |
| T-Mobile | Fixed wireless | 32% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have National City’s trash rules yet
Pickup rules, the dump and recycling in National City.
Where your child goes to school
Public school districts and the school path by grade.
National City is in two districts that split the grades: Sweetwater Union High School District and National Elementary School District.
BSchool 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 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
National City is in ZIP code 91950
ZIP codes where National City residents live, with the share of the town in each.
| ZIP | Post office name | Share of National City | ZIP’s residents in National City |
|---|---|---|---|
| 91950 | National City, CA | 99% | 96% |
A few homes fall in 91902. 91951 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 National City
Who supplies National City’s drinking water, and has it had violations?
Sweetwater Authority (EPA ID CA3710025). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in National City?
SDG&E (San Diego Gas & Electric Co.), an investor-owned utility. Its homes paid about 45.8¢ per kWh in 2025 (EIA).
What internet providers serve National City?
Cox Communications, AT&T, Pacific Wyyerd, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in National City?
91950. Census 2020 ZIP Code Tabulation Areas.
What school district is National City in?
Sweetwater Union High School District and National Elementary School District. Parts of the city are in Chula Vista Elementary School District.
How do I register to vote in National City?
In California you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the San Diego Registrar of Voters. Check your registration at voterstatus.sos.ca.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 Nov 18, 2024 (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.