Mammoth Lakes Water Department - Pay Bill, Contact, Address & Services
Everything you need for Mammoth Cwd — serving 8,234 residents in Mammoth Lakes, CA.
8,234
Residents Served
3,818
Connections
Mon–Fri 8:00 AM – 5:00 PM
Office Hours
Mammoth Lakes Water Department Address
Mammoth Lakes, CA 93546
Local Tip: Street parking near Mammoth Lakes municipal offices fills up fast before 10 AM. Arrive early if paying in person or drop your check in the after-hours payment box.
Mammoth Lakes Water Department Contact
Customer Service
(760) 934-2596
Office Hours
Mon–Fri 8:00 AM – 5:00 PM
How to Pay Your Mammoth Lakes Water Bill Online
Visit the Official Payment Page
Go to the Mammoth Cwd 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.
Mammoth Lakes Water Bill Payment Guide
Complete step-by-step payment instructions, accepted methods, billing tips, and more.
💡 Mammoth Lakes 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
Mammoth Lakes 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 Mammoth Lakes? Contact Mammoth Cwd 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 Mammoth Lakes? 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 Mammoth Lakes
Water Leak
Notice water pooling near the street or sidewalk? Call Mammoth Cwd immediately. Do not try to access the meter box yourself.
Sewer Backup
Call your utility before contacting a plumber. Mammoth Lakes 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 (760) 934-2596 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.
Mammoth Lakes Water Billing & Fees
Official Mammoth Lakes Water Links
Mammoth Lakes Water Department FAQ
Visit the official Mammoth Cwd 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 Mammoth Cwd at (760) 934-2596. The office is open during Mon–Fri 8:00 AM – 5:00 PM.
Mammoth Cwd is located at P.o. Box 597, Mammoth Lakes, CA 93546.
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 (760) 934-2596 before relying on portal timing.
Call Mammoth Cwd immediately at (760) 934-2596. For after-hours emergencies, most departments have a 24/7 hotline. Do not attempt to fix a main line break yourself.
Contact Mammoth Cwd at (760) 934-2596 at least 3 business days before your move date. Bring a valid ID and proof of address to start new service.