Great Oaks Water Company
Blossom Valley, Santa Teresa, Edenvale, Coyote Valley, and Almaden Valley areas of San Jose
Population reference
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.
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
- 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.
- Rate structure
- 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.
- Residential cost reference
- 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.
- 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 reading
- 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.
- New-account deposit
- Great Oaks’ FAQ states that a security deposit is mandated by its tariff and is payable when service is discontinued for nonpayment. The deposit is held in trust and credited back when the account has remained current for an entire calendar year or when the account closes, whichever occurs first. The current public pages do not publish a universal 2026 dollar amount, credit-check waiver, or new-account deposit schedule; the amount is therefore not publicly documented from the provider’s public materials and should be confirmed with Customer Service before service is established.
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
- Activation or transfer fee
“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
- Great Oaks Water Company public website ↗
Provider-controlled destination used to confirm current customer instructions.
- csd.ca.gov reference ↗
Public URL preserved in the compiled record. Confirm its publisher, date, and applicability before relying on it.
- EPA SDWIS / ECHO lookup (CA4310022) ↗
Search the federal drinking-water database using public water system ID CA4310022.