Golden State Water Company – San Dimas Customer Service Area
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 reference
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.
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 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.
- Rate structure
- 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.
- Residential cost reference
- 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.
- Meter reading
- 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.
- New-account deposit
- Golden State Water’s Rule 7 permits a deposit to establish or re-establish credit, but the reviewed public application materials do not publish one universal San Dimas startup-deposit dollar amount or a routine credit-check waiver. After a nonpayment discontinuance, the published policy allows a deposit equal to twice the average monthly or bimonthly bill. Deposit requirements can depend on credit history, prior service, tenancy, and account circumstances; customers should obtain the exact amount from 1-800-999-4033 before activation. The tariff protects a residential customer from shutoff for nonpayment until a credit-establishing deposit 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 – San Dimas Customer Service Area public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA SDWIS / ECHO lookup (CA1910142) ↗
Search the federal drinking-water database using public water system ID CA1910142.