Photo: OsotedeMonte · CC BY 3.0Living in Riverdale Park, CA: what to set up and who to call
Riverdale Park has no town government of its own, so Stanislaus County runs its elections and most services, and its children attend Modesto City Elementary School District. Riverdale Park Tract Csd has a clean five-year EPA record, but its latest lead result, 5.0 ppb, was higher than 91% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Riverdale Park, 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 Riverdale Park.
Power comes from Turlock Irrigation District
Turlock Irrigation District (Turlock Irrigation District), a political subdivision utility, serves all of Riverdale Park. Its homes paid an average of 17.4¢ per kWh in 2025, about $142 a month (its average across California).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Riverdale Park Tract Csd
Riverdale Park Tract Csd supplies Riverdale Park: about 73% of residents live in its service area. About 27% 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 610 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 5.0 ppb, below the 15 ppb action level that applied. That’s higher than 91% 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. CA5000019.
8 home internet providers serve Riverdale Park
100% of 322 addresses can get 100/20 Mbps; 31% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 99% | 2,000/250 |
| AT&T | DSL, Fiber, Fixed wireless | 93% | 5,000/5,000 |
| unWired Broadband | Fixed wireless | 100% | 200/25 |
| Cal.net | Fixed wireless | 100% | 100/20 |
| Ayera Technologies | Fixed wireless | 98% | 1,000/500 |
| ezWave | Fixed wireless | 97% | 10/1 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Riverdale Park’s trash rules yet
Pickup rules, the dump and recycling in Riverdale Park.
Where your child goes to school
Public school districts and the school path by grade.
Riverdale Park is in two districts that split the grades: Modesto City Elementary School District and Modesto City High School District.
CSchool gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Riverdale Park is unincorporated, so Stanislaus County is the local government.
Election office: FVAP local election office directory, updated Jul 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Riverdale Park is in ZIP code 95358
ZIP codes where Riverdale Park residents live, with the share of the town in each.
| ZIP | Post office name | Share of Riverdale Park | ZIP’s residents in Riverdale Park |
|---|---|---|---|
| 95358 | Modesto, CA | 100% | 3% |
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 Riverdale Park
Who supplies Riverdale Park’s drinking water, and has it had violations?
Riverdale Park Tract Csd (EPA ID CA5000019). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 5.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Riverdale Park?
Turlock Irrigation District (Turlock Irrigation District), a political subdivision utility. Its homes paid about 17.4¢ per kWh in 2025 (EIA).
What internet providers serve Riverdale Park?
Xfinity, AT&T, unWired Broadband, Cal.net, Ayera Technologies, ezWave (FCC, as of December 2025).
What ZIP codes are in Riverdale Park?
95358. Census 2020 ZIP Code Tabulation Areas.
What school district is Riverdale Park in?
Modesto City Elementary School District and Modesto City High School District.
How do I register to vote in Riverdale Park?
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 Stanislaus County Clerk, 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.