Half Moon Bay Water Department - Pay Bill, Contact, Address & Services
Everything you need for Coastside County Water District — serving 18,940 residents in Half Moon Bay, CA.
18,940
Residents Served
6,617
Connections
Mon–Fri 8:00 AM – 5:00 PM
Office Hours
Half Moon Bay Water Department Address
Half Moon Bay, CA 94019
Local Tip: Street parking near Half Moon Bay municipal offices fills up fast before 10 AM. Arrive early if paying in person or drop your check in the after-hours payment box.
Half Moon Bay Water Department Contact
Customer Service
(650) 276-0889
Office Hours
Mon–Fri 8:00 AM – 5:00 PM
How to Pay Your Half Moon Bay Water Bill Online
Visit the Official Payment Page
Go to the Coastside County Water District website. Look for the "Pay My Bill" or "Online Payments" section.
Visit Official Website →Enter Your Account Number
Find your account number on your paper bill (top-right corner). Enter it along with your last name or service address.
Choose a Payment Method
Select credit card, debit card, eCheck, or bank draft. eCheck is often free while cards may have a small convenience fee.
Confirm and Save Your Receipt
Review the total, submit payment, and save or screenshot your confirmation number. Payments usually post within 1-2 business days.
Quick Tip: Payments made before 3 PM usually post the same business day. Weekend and holiday payments process the next business day.
Half Moon Bay Water Bill Payment Guide
Complete step-by-step payment instructions, accepted methods, billing tips, and more.
💡 Half Moon Bay Insider Tips
Best Time to Call
Lines are shortest right when the office opens. Try calling at 8:00 AM on a Tuesday or Wednesday to skip the queue.
Save on Fees
Half Moon Bay accepts eCheck payments at no extra charge. Card payments may add a $2-3 convenience fee per transaction.
Start, Stop, or Transfer Water Service
Start New Service
Moving into Half Moon Bay? Contact Coastside County Water District at least 3 business days before your move-in date.
✓ Valid photo ID required
✓ Proof of address (lease or deed)
✓ Deposit may apply for new accounts
Stop Service
Moving out? Request disconnection at least 2 business days ahead. You will receive a final bill.
✓ Final meter reading scheduled
✓ Forwarding address for final bill
✓ Deposit refunded within 30 days
Transfer Service
Moving within Half Moon Bay? Transfer your existing account instead of closing and reopening.
✓ Same account number kept
✓ No new deposit needed
✓ Processing: 1-3 business days
Report Water Issues in Half Moon Bay
Water Leak
Notice water pooling near the street or sidewalk? Call Coastside County Water District immediately. Do not try to access the meter box yourself.
Sewer Backup
Call your utility before contacting a plumber. Half Moon Bay will check the main line first at no charge if the issue is on their side.
Service Outage
No water? Check with your neighbors first. If the outage is widespread, call (650) 276-0889 for a restoration estimate.
Real-Life Tip: Take a quick photo or video of the issue before calling. It helps dispatch prioritize and gives the crew a head start before arriving on site.
Half Moon Bay Water Billing & Fees
Official Half Moon Bay Water Links
Half Moon Bay Water Department FAQ
Visit the official Coastside County Water District payment portal online. You can pay with a credit card, debit card, or eCheck. A guest pay option is available if you do not have an online account.
You can reach Coastside County Water District at (650) 276-0889. The office is open during Mon–Fri 8:00 AM – 5:00 PM.
Coastside County Water District is located at 766 Main Street, Half Moon Bay, CA 94019.
Yes. Most municipal portals offer a one-time guest payment option. You only need your account number from a recent paper bill.
Many utilities accept past-due payments online, but reconnection timing varies. If your service is disconnected or scheduled for shutoff, call (650) 276-0889 before relying on portal timing.
Call Coastside County Water District immediately at (650) 276-0889. For after-hours emergencies, most departments have a 24/7 hotline. Do not attempt to fix a main line break yourself.
Contact Coastside County Water District at (650) 276-0889 at least 3 business days before your move date. Bring a valid ID and proof of address to start new service.