Photo: Johnwayne Stroud · CC BY-SA 3.0Living in Calimesa, CA: what to set up and who to call
Yucaipa Valley Water District reported 3 health-based violations to EPA in the last five years: nitrate, disinfection byproducts (TTHM), a surface water treatment requirement (Long Term 2 Enhanced Surface Water Treatment Rule). 90% of systems its size reported none. Calimesa has its own library, Calimesa Library, at 974 Calimesa Blvd.
I’m new in town
What to set up in Calimesa, 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 Calimesa.
Power comes from Southern California Edison
Southern California Edison (Southern California Edison Co), an investor-owned utility, serves all of Calimesa. Its homes paid an average of 31.5¢ per kWh in 2025, about $149 a month (its average across California, for customers on its standard service). California lets you buy power from another supplier; 30% of Southern California Edison’s home customers do, and Southern California Edison still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Yucaipa Valley Water District
Yucaipa Valley Water District supplies Calimesa: about 61% of residents live in its service area. South Mesa Wc serves another 23%. Plantation on the Lake Park serves another 10%. About 24% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water (EPA lists South Mesa Wc and Western Heights Water Company as sellers) and serves 52,010 people in all.
3 health-based violations reported to EPA in the five years to October 2026: nitrate, disinfection byproducts (TTHM), a surface water treatment requirement (Long Term 2 Enhanced Surface Water Treatment Rule), the latest beginning Mar 2026. 90% of the 597 systems serving 50,001–100,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, 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. CA3610055.
5 home internet providers serve Calimesa
98% of 4,410 addresses can get 100/20 Mbps; 67% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 96% | 1,000/1,000 |
| Frontier | Fiber, DSL | 61% | 7,000/7,000 |
| Verizon | Fixed wireless | 56% | 300/20 |
| AT&T | Fixed wireless | 40% | 25/3 |
| T-Mobile | Fixed wireless | 26% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Calimesa’s trash rules yet
Pickup rules, the dump and recycling in Calimesa.
Where your child goes to school
Public school districts and the school path by grade.
Most of Calimesa (50%) is in Yucaipa-Calimesa Joint Unified School District; parts are in Beaumont Unified School District (50%).
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 Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Calimesa is in ZIP code 92320
ZIP codes where Calimesa residents live, with the share of the town in each.
| ZIP | Post office name | Share of Calimesa | ZIP’s residents in Calimesa |
|---|---|---|---|
| 92320 | Calimesa, CA | 100% | 100% |
A few homes fall in 92223.
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 Calimesa
Who supplies Calimesa’s drinking water, and has it had violations?
Yucaipa Valley Water District (EPA ID CA3610055). It reported 3 health-based violations to EPA in the five years to October 2026: nitrate, disinfection byproducts (TTHM), a surface water treatment requirement (Long Term 2 Enhanced Surface Water Treatment Rule). 90% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Calimesa?
Southern California Edison (Southern California Edison Co), an investor-owned utility. Its homes paid about 31.5¢ per kWh in 2025 (EIA).
What internet providers serve Calimesa?
Spectrum, Frontier, Verizon, AT&T, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Calimesa?
92320. Census 2020 ZIP Code Tabulation Areas.
What school district is Calimesa in?
Yucaipa-Calimesa Joint Unified School District. Parts of the city are in Beaumont Unified School District.
How do I register to vote in Calimesa?
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 Riverside 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.