Photo: Djh57 · CC BY 3.0Living in Coronado, CA: what to set up and who to call
Cal-Am Water Coronado reported one health-based violation to EPA in the last five years: a bacteria testing requirement (Revised Total Coliform Rule), beginning Aug 2023. Two school districts split the grades in Coronado: Sweetwater Union High School District and Coronado Unified School District.
I’m new in town
What to set up in Coronado, 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 Coronado.
Power comes from SDG&E
SDG&E (San Diego Gas & Electric Co.), an investor-owned utility, serves 95.1% of Coronado residents. 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 Cal-Am Water Coronado
Cal-Am Water Coronado supplies Coronado: about 93% of residents live in its service area. Nas North Island & Nab Coronado serves another 9%. It buys treated surface water (EPA lists City of San Diego and Sweetwater Authority and Otay Water District and Nas North Island & Nab Coronado as sellers) and serves 106,000 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a bacteria testing requirement (Revised Total Coliform Rule), beginning Aug 2023. 86% of the 332 systems serving 100,001–250,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 2.0 ppb, below the 15 ppb action level that applied. That’s higher than 64% 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. Violations are counted by the start of their compliance period. CA3710001.
4 home internet providers serve Coronado
95% of 5,017 addresses can get 100/20 Mbps; 59% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 98% | 1,000/35 |
| AT&T | Fiber, DSL, Fixed wireless | 94% | 5,000/5,000 |
| T-Mobile | Fixed wireless | 73% | 100/20 |
| Verizon | Fixed wireless | 72% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Coronado depends on your street
Pickup days, the drop-off and recycling in Coronado, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayFind your street’s day on coronado.ca.us →
- RecyclingEvery week
- Bulky itemsCall to book
Accepted at the curb
- Aluminum
- Paperboard
- Glass containers
- Clean cardboard
- Metal
- Carton containers
- Styrofoam
- Mixed paper
- All rigid plastics
From coronado.ca.us, the town’s official site, checked Oct 21, 2026; pages dated January 1, 2024. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Coronado is in two districts that split the grades: Sweetwater Union High School District and Coronado Unified School District.
B+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 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Coronado spans 3 ZIP codes
ZIP codes where Coronado residents live, with the share of the town in each.
| ZIP | Post office name | Share of Coronado | ZIP’s residents in Coronado |
|---|---|---|---|
| 92118 | Coronado, CA | 91% | 89% |
| 92135 | San Diego, CA | 8% | 100% |
| 92155 | San Diego, CA | 1% | 100% |
92178 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 Coronado
Who supplies Coronado’s drinking water, and has it had violations?
Cal-Am Water Coronado (EPA ID CA3710001). It reported 1 health-based violation to EPA in the five years to October 2026: a bacteria testing requirement (Revised Total Coliform Rule). 86% of systems its size had none. Its latest lead 90th percentile was 2.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Coronado?
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 Coronado?
Spectrum, AT&T, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Coronado?
92118 (91%), 92135 (8%), 92155 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Coronado in?
Sweetwater Union High School District and Coronado Unified School District. Parts of the city are in South Bay Union School District.
How do I register to vote in Coronado?
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: Coronado’s own website (coronado.ca.us), read Oct 21, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.