Private Investor-Owned Utility
Great Oaks Water Company
Serving Blossom Valley, Santa Teresa, Edenvale, Coyote Valley, and Almaden Valley areas of San Jose
Population served
EPA SDWIS active CWS CA4310022 reports approximately 110,202 people served, including 110,088 residential and 114 non-residential population. The state inventory lists 20,626 residential metered connections, 724 commercial, 55 industrial, and 10 agricultural connections. Great Oaks’ own website describes the system as serving more than 20,000 customers in southeast San Jose.
State system code
FIPS 06
Billing frequency
Residential customers are billed every two months, normally six bills per year. Great Oaks’ bill calculator describes a typical 54–66-day bimonthly period; its tariff allows monthly or bimonthly rendering at the utility’s option.
Provider briefing
How this utility’s billing works
Great Oaks Water Company operates as a private investor-owned utility serving Blossom Valley, Santa Teresa, Edenvale, Coyote Valley, and Almaden Valley areas of San Jose. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.
The published water-rate framework is described as CPUC-regulated metered service with a monthly readiness-to-serve charge based on meter size and increasing block tiers for single-family residential customers over each bimonthly period. Effective July 1, 2026, a 5/8 x 3/4-inch meter is $21.66 per month and a 3/4 x 3/4-inch meter is $32.49 per month. Residential usage is tiered at $2.9454/CCF for 0–12 CCF, $5.0831/CCF for above 12 through 20 CCF, and $7.0177/CCF over 20 CCF; non-single-family customers use a uniform $4.1427/CCF rate. One CCF is 748 gallons. The bill also includes a 0.70% CPUC fee, 5% City of San Jose tax, and applicable purchased-power and CAP surcharges.. Bills are generated residential customers are billed every two months, normally six bills per year. great oaks’ bill calculator describes a typical 54–66-day bimonthly period; its tariff allows monthly or bimonthly rendering at the utility’s option., and a typical residential cost reference is For a standard 3/4 x 3/4-inch single-family meter, Great Oaks’ official July 1, 2026 bill calculator shows $156.22 for 20 CCF over two months, including the $64.98 bimonthly readiness charge, tiered usage, the $0.1469/CCF purchased-power surcharge, the $0.1917/CCF CAP surcharge for non-CAP users, the 0.70% CPUC fee, and 5% San Jose tax. Using the same published rates, a typical 5,000–7,000 gallons-per-month household is approximately $104–$146 per month for water, with actual bills changing by meter size, billing-day proration, surcharges, CAP status, and consumption. Great Oaks provides potable water only; wastewater is billed separately by the applicable San Jose sewer agency.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.
Wastewater and sewer calculation
Great Oaks Water Company supplies and bills potable water but does not calculate or collect municipal wastewater charges on its water account. Sewer service for a San Jose property is billed by the City of San Jose or another local sanitation agency according to that agency’s own fixed charge, usage, strength, or other residential formula. Customers must use the sewer bill and service-boundary rate schedule for wastewater amounts; no Great Oaks winter-average sewer calculation is published.
Meter and infrastructure notes
Great Oaks’ bill calculator defines consumption as the ending meter read less the beginning meter read over the 54–66-day bimonthly billing period, and its public meter page instructs customers to read the physical meter dial and perform a two-hour no-use leak test. The company does not publish an AMI/AMR manufacturer, hourly customer portal, remote-transmission specification, or route calendar. The publicly verifiable method is therefore a metered bimonthly read, with customers able to inspect the meter manually; the exact reading date and whether a particular account is remotely read should be confirmed with Great Oaks.
Emergency water support
Report a leak or water emergency
Great Oaks’ after-hours emergency telephone number is (408) 879-8246. Customer Service during office hours is (408) 227-9540, with the office open Monday through Friday, 8:00 a.m.–5:00 p.m. The emergency page instructs customers not to remove a Great Oaks meter lock and to call the company when a locked meter prevents service; a broken lock can incur a $25 restoration charge.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Blossom Valley, Santa Teresa, Edenvale, Coyote Valley, and Almaden Valley areas of San Jose
Great Oaks Water Company is listed here as a private investor-owned utility. The profile separates account actions—such as paying a bill or requesting service—from explanatory material about rates, meters, wastewater, leaks, and delinquency.
Because utility rules can vary by account class, meter size, service address, billing date, and local ordinance, treat the published bill and current provider website as the final authority. Use this profile to locate the correct channel and prepare better questions for customer service.
If your issue is urgent, start with the provider’s emergency number or official payment route rather than waiting for an email response. Keep a written record of calls, confirmation numbers, notice dates, and documents you submit.