Living in Lake Nacimiento, CA: what to set up and who to call
The Heritage Ranch Csd water system reported 10 health-based violations to EPA in the last five years: disinfection byproducts (HAA5) ×8, disinfection byproducts (TTHM) ×2. 78% of systems its size reported none. Lake Nacimiento has no town government of its own, so San Luis Obispo County runs its elections and most services, and its children attend Paso Robles Joint Unified School District.
I’m new in town
What to set up in Lake Nacimiento, 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 Lake Nacimiento.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of Lake Nacimiento. Its homes paid an average of 37.5¢ per kWh in 2025, about $174 a month (its average across California, for customers on its standard service). California lets you buy power from another supplier; 66% of PG&E’s home customers do, and PG&E still delivers it.
Start or move service: pgecorp.com
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Heritage Ranch Csd water system
The Heritage Ranch Csd water system supplies almost all of Lake Nacimiento. It draws surface water and serves 2,956 people in all.
10 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×8, disinfection byproducts (TTHM) ×2, the latest beginning Jan 2024. 78% of the 7,966 systems serving 1,001–3,300 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, 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. CA4010012.
2 home internet providers serve Lake Nacimiento
94% of 1,881 addresses can get 100/20 Mbps; 1% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 88% | 1,000/35 |
| Verizon | Fixed wireless | 35% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Lake Nacimiento’s trash rules yet
Pickup rules, the dump and recycling in Lake Nacimiento.
Where your child goes to school
Public school districts and the school path by grade.
Most of Lake Nacimiento (44%) is in Paso Robles Joint Unified School District; parts are in San Miguel Joint Union Elementary School District (28%) and Paso Robles Joint Unified School District (9-12) (28%).
B−School 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
Lake Nacimiento is unincorporated, so San Luis Obispo County is the local government.
Election office: FVAP local election office directory, updated Sep 2020; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Lake Nacimiento is in ZIP code 93446
ZIP codes where Lake Nacimiento residents live, with the share of the town in each.
| ZIP | Post office name | Share of Lake Nacimiento | ZIP’s residents in Lake Nacimiento |
|---|---|---|---|
| 93446 | Paso Robles, CA | 100% | 6% |
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 Lake Nacimiento
Who supplies Lake Nacimiento’s drinking water, and has it had violations?
The Heritage Ranch Csd water system (EPA ID CA4010012). It reported 10 health-based violations to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×8, disinfection byproducts (TTHM) ×2. 78% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Lake Nacimiento?
PG&E (Pacific Gas & Electric Co.), an investor-owned utility. Its homes paid about 37.5¢ per kWh in 2025 (EIA).
What internet providers serve Lake Nacimiento?
Spectrum, Verizon (FCC, as of December 2025).
What ZIP codes are in Lake Nacimiento?
93446. Census 2020 ZIP Code Tabulation Areas.
What school district is Lake Nacimiento in?
Paso Robles Joint Unified School District. Parts of the city are in San Miguel Joint Union Elementary School District and Paso Robles Joint Unified School District (9-12).
How do I register to vote in Lake Nacimiento?
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 Luis Obispo County Clerk-Elections. 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.