Private Investor-Owned Utility
Golden State Water Company – Claremont Customer Service Area
Serving Golden State Water Claremont Customer Service Area, including Claremont and portions of Montclair, Pomona, and Upland; active CWS CA1910024
Population served
39,730 residents served by active California community water system CA1910024, according to California Drinking Water Watch. The state registry lists approximately 10,414 residential, 589 commercial, 282 agricultural, and 10 industrial connections. The system’s active sources include purchased treated water from Three Valleys Municipal Water District and the City of Upland plus groundwater wells serving the Claremont area.
State system code
FIPS 06
Billing frequency
Monthly or bi-monthly depending on the account. Golden State Water’s published policy expressly covers bills rendered monthly or bimonthly, and the customer FAQ says the bill can be monthly or bimonthly. The customer’s printed statement controls the due date and cycle; the ordinary Claremont residential tariff lists monthly readiness-to-serve charges and monthly Ccf tiers.
Provider briefing
How this utility’s billing works
Golden State Water Company – Claremont Customer Service Area operates as a private investor-owned utility serving Golden State Water Claremont Customer Service Area, including Claremont and portions of Montclair, Pomona, and Upland; active CWS CA1910024. 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 meter-size monthly readiness-to-serve charge, plus any separately identified authorized surcharges or balancing-account items. The January 1, 2026 Region 3 residential tariff that covers ordinary Claremont residential metered service 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. A 5/8 x 3/4-inch meter has a $36.76 monthly service charge; larger meters have larger charges. Claremont also has a distinct limited-metered service schedule for qualifying limited-service classifications, which should not be applied to a normal residential meter without confirming the account class.. Bills are generated monthly or bi-monthly depending on the account. golden state water’s published policy expressly covers bills rendered monthly or bimonthly, and the customer faq says the bill can be monthly or bimonthly. the customer’s printed statement controls the due date and cycle; the ordinary claremont residential tariff lists monthly readiness-to-serve charges and monthly ccf tiers., and a typical residential cost reference is For an ordinary 5/8 x 3/4-inch Claremont residential meter, the January 1, 2026 Region 3 tariff gives a $36.76 monthly service charge. A 5,000–7,000-gallon month is approximately 6.68–9.36 Ccf, all within Tier 1, producing estimated water charges of about $69.65–$82.82 before authorized surcharges, taxes, balancing-account items, or other charges. Golden State’s Claremont page publishes a different benchmark for a 1-inch meter using 11,220 gallons/15 Ccf, whose current bill is shown as $167.93; meter size and account classification materially change the result.. 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 Golden State Water CWS CA1910024. The Claremont system is a regulated potable-water provider, and Golden State’s Claremont tariff/payment materials do not bill municipal wastewater, publish winter averaging, or calculate sewer as a percentage of water intake. Any sewer charge on a customer’s combined property bill belongs to a separate sewer agency or provider unless the customer confirms otherwise.
Meter and infrastructure notes
Golden State bills water in Ccf, with one Ccf equal to 748 gallons, and explains that the meter reader records cubic feet and removes the final black-background digits for billing. MyGSWater provides consumption history and account information, but the reviewed Claremont materials do not identify an AMI/AMR vendor, transmission interval, or route calendar. The documented customer-facing model is periodic meter reading plus online history; universal hourly smart-meter telemetry remains unverified.
Emergency water support
Report a leak or water emergency
909-394-2272 is Golden State Water’s local 24-hour Claremont-area customer-service and emergency line; 1-800-999-4033 is the company’s toll-free 24/7 line. The company also provides an authorized service-request portal. For immediate life-safety threats, call 911.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Golden State Water Claremont Customer Service Area, including Claremont and portions of Montclair, Pomona, and Upland; active CWS CA1910024
Golden State Water Company – Claremont 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.