California Water Service Company - Oroville System
Oroville and vicinity in Butte County
Population reference
11,106 people; 2,731 residential service connections, 780 commercial connections, and 17 industrial connections according to California Drinking Water Watch for active system CA0410005.
Billing detail
Broad public detail found
Official destination
Open provider website ↗Provider-specific findings
Billing and account research from public material
Provider-specific research notes are displayed separately from fields that contain only an unavailable-information marker. Read qualifiers in each note and verify current account terms with the provider.
- Billing frequency
- Generally monthly billing, with the bill showing the service period, meter read dates, current charges, due date, and prior balance. The exact read and due-date calendar is premise-specific.
- Rate structure
- CPUC-regulated metered residential structure for the Oroville tariff area, with a fixed monthly service charge plus volumetric charges under the Residential Metered Service ORO (North Valley Region) schedule; separate non-residential, limited-flat-rate, irrigation, and interruptible-irrigation schedules also apply. Cal Water's current Oroville page identifies the residential ORO tariff as effective July 1, 2026, but the live page did not expose the current dollar table, so unpublished tier amounts are not inferred.
- Wastewater and sewer calculation
- Cal Water bills the Oroville potable-water charge. Sewer or wastewater charges are normally imposed separately by the City of Oroville or another serving sewer agency and are not governed by one Cal Water formula. The sewer agency may use actual water consumption, a winter average, a residential cap, or a fixed equivalent-unit charge. Customers should compare the water meter usage with the separate sewer bill and ask the serving agency for its current base, usage, winter-average, and adjustment rules.
- Meter reading
- The Oroville system uses customer water meters and Cal Water's periodic billing reads. The district page does not publish a fixed local AMI deployment percentage or route day; Cal Water company materials describe AMR/AMI pilots in selected districts but do not establish that every Oroville account has an advanced meter. Customers should use the bill's read dates and current/previous reads, review usage history in the portal, and ask Cal Water to confirm the exact meter technology and leak-alert capability for the premise. Cal Water reports a surface-water supply from the west branch of the Feather River processed at its treatment plant, supplemented by four local wells, with 52 miles of pipeline, two storage tanks, and six booster pumps.
- New-account deposit
- Cal Water Rule 6 permits a cash deposit or other approved credit security when an applicant does not establish credit; the exact amount is account- and credit-specific rather than a universal Oroville flat amount. Under the reviewed Rule 7 terms, after 12 consecutive months in which at least 10 bills were paid within 15 days after presentation and service was not discontinued for nonpayment, the deposit is automatically refunded as an account credit with applicable interest. A customer re-establishing service after delinquency may need to pay the balance, reconnection charges, and a deposit.
- Activation or transfer fee
- No single universal 2026 routine name-transfer fee is stated on the reviewed Oroville district or payment pages. New-service connections, meters, deposits, construction, inspections, and special facilities are governed separately by Cal Water rules and tariffs. Obtain a premise-specific activation, connection, or deposit quote from the Oroville District rather than assuming every transfer is free.
Context, not a score
How documentation coverage compares
This profile
86%
overview fields with research notes
California
67%
records with any overview detail
National index
50%
records with any overview detail
Coverage measures what this directory documented. It does not measure service quality, affordability, or regulatory compliance.
Research record
Broad public detail found
6 of 7 fields in this section contain provider-specific public detail in dataset August 1, 2026.
Documented
86%
Details not confirmed in the reviewed public material
- Residential cost reference
“Not confirmed” means the directory did not identify a dependable public statement. It does not mean the provider has no policy or option.
Primary verification routes
- California Water Service Company - Oroville System public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA SDWIS / ECHO lookup (CA0410005) ↗
Search the federal drinking-water database using public water system ID CA0410005.