Golden State Water Company – Claremont Customer Service Area
Golden State Water Claremont Customer Service Area, including Claremont and portions of Montclair, Pomona, and Upland; active CWS CA1910024
Population reference
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.
Billing detail
Partial 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
- 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.
- Rate structure
- 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.
- Residential cost reference
- 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.
- Meter reading
- 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.
- New-account deposit
- Rule 7 governs deposits to establish or re-establish credit, but the reviewed public materials do not publish one universal Claremont startup-deposit amount or a routine credit-check waiver. After a nonpayment shutoff, the published policy allows a deposit equal to twice the average monthly or bimonthly bill. The exact new-account amount depends on credit, prior service, tenancy, and account facts and must be confirmed with 1-800-999-4033. A credit-establishing residential deposit is protected from being bypassed by shutoff until it has been fully absorbed.
Context, not a score
How documentation coverage compares
This profile
71%
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
Partial public detail found
5 of 7 fields in this section contain provider-specific public detail in dataset August 1, 2026.
Documented
71%
Details not confirmed in the reviewed public material
- Wastewater and sewer calculation
- 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
- Golden State Water Company – Claremont Customer Service Area public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA SDWIS / ECHO lookup (CA1910024) ↗
Search the federal drinking-water database using public water system ID CA1910024.