Private Investor-Owned Utility
Golden State Water Company – San Dimas Customer Service Area
Serving Golden State Water San Dimas Customer Service Area, including portions of Charter Oak, Covina, Glendora, La Verne, San Dimas, and Walnut; active CWS CA1910142
Population served
56,538 residents served by active California community water system CA1910142, according to California Drinking Water Watch. The state registry lists approximately 15,120 residential, 930 commercial, 112 agricultural, and 1 industrial connection. The system blends groundwater from the Main San Gabriel Basin with purchased water from Metropolitan Water District of Southern California, Three Valleys Municipal Water District, Walnut Valley Water District, and other documented connections.
State system code
FIPS 06
Billing frequency
Monthly or bi-monthly depending on the account and service area. Golden State Water’s disconnection policy expressly covers bills rendered monthly or bimonthly, and the company’s account FAQ says a customer’s bill can be monthly or bimonthly. The actual cycle and due date are printed on the customer’s bill; San Dimas residential tariffs are expressed as per-month service charges and Ccf usage tiers.
Provider briefing
How this utility’s billing works
Golden State Water Company – San Dimas Customer Service Area operates as a private investor-owned utility serving Golden State Water San Dimas Customer Service Area, including portions of Charter Oak, Covina, Glendora, La Verne, San Dimas, and Walnut; active CWS CA1910142. 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 increasing block tiers with a fixed monthly readiness-to-serve charge by meter size, plus any CPUC-authorized balancing-account, purchased-water/power, conservation, or drought surcharges shown separately on the tariff or bill. The January 1, 2026 Region 3 residential tariff covering San Dimas lists Tier 1 for the first 12 Ccf at $4.921/Ccf, Tier 2 for the next 32 Ccf at $5.659/Ccf, and Tier 3 over 44 Ccf at $6.508/Ccf. The 5/8 x 3/4-inch residential service charge is $36.76 per month; larger meters have larger charges. One Ccf equals 748 gallons.. Bills are generated monthly or bi-monthly depending on the account and service area. golden state water’s disconnection policy expressly covers bills rendered monthly or bimonthly, and the company’s account faq says a customer’s bill can be monthly or bimonthly. the actual cycle and due date are printed on the customer’s bill; san dimas residential tariffs are expressed as per-month service charges and ccf usage tiers., and a typical residential cost reference is Using the January 1, 2026 San Dimas/Region 3 residential tariff for a 5/8 x 3/4-inch meter, the $36.76 monthly service charge plus 5,000–7,000 gallons (approximately 6.68–9.36 Ccf, all within Tier 1) produces an estimated water-only monthly bill of about $69.65–$82.82 before taxes, balancing-account items, conservation/drought surcharges, or other charges. Golden State’s San Dimas page gives a current-bill benchmark of $95.81 for an average 8,976-gallon/12-Ccf residential customer; the exact account total depends on the tariff components and billing period printed on the bill.. 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
A dedicated this detail was not publicly posted. For the Golden State Water San Dimas account. CA1910142 is a regulated potable-water system, and the company’s San Dimas tariff and payment materials do not bill municipal sewer/wastewater, publish a winter-average formula, or tie sewer charges to water intake. Any sewer charge appearing on a property’s combined municipal statement would be from a separate provider or agency and should not be attributed to Golden State Water.
Meter and infrastructure notes
Golden State Water bills San Dimas residential usage in Ccf, where one Ccf equals 748 gallons, and explains that the meter reader records cubic feet and discards the last two black-background digits for billing. The reviewed public materials do not disclose a San Dimas AMI/AMR vendor, radio interval, or fixed route calendar. MyGSWater provides consumption and payment history, but that does not establish universal hourly telemetry; the customer-facing record should therefore be described as periodic meter reading with portal history and unverified smart-meter deployment status.
Emergency water support
Report a leak or water emergency
909-394-2272 is Golden State Water’s local 24-hour San Dimas-area customer-service and emergency number; the toll-free 24/7 number is 1-800-999-4033. The company says representatives are available 24 hours a day, 7 days a week. Customers may also submit a service request through the authorized Golden State Water support portal. Call 911 for an immediate life-safety emergency.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Golden State Water San Dimas Customer Service Area, including portions of Charter Oak, Covina, Glendora, La Verne, San Dimas, and Walnut; active CWS CA1910142
Golden State Water Company – San Dimas Customer Service Area 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.