Have you been strugglin’ to figure out how to pay your water bill in San Luis Obispo County? Trust me, I’ve been there! After moving to SLO last year, I spent way too much time trying to understand the different payment systems. That’s why I decided to put together this complete guide to paying your SLO water bill – whether you live in the City of San Luis Obispo or in county areas like Shandon, Cayucos, or Santa Margarita.
City of SLO vs. County Water Service: Know the Difference!
First things first – there’s a BIG difference between City of San Luis Obispo water service and San Luis Obispo County water service. They have completely separate billing systems payment portals, and contact information!
- City of SLO water customers: Use the Civic Pay Online system at slocity.merchanttransact.com
- County water customers (Shandon, Cayucos, Santa Margarita): Use the County system at slocounty.ca.gov/waterbill
I personally made this mistake when I first moved here – tried paying my city bill through the county system and wondered why my account wouldn’t work! Don’t be like me
How to Pay Your Water Bill for SLO County Residents
If you live in Shandon, Cayucos, or Santa Margarita, you’ll be dealing with the San Luis Obispo County water system. They recently upgraded their payment portal to make things easier!
SLO County’s NEW Online Payment Portal
The County launched a new customer portal that gives full access to your water account info Here’s what you can do there
- Track your water usage
- Pay bills online
- Set up automatic payments
- Sign up for paperless billing
- Get notifications on any device
To access this portal, just visit slocounty.ca.gov/waterbill and register for an account. If you need help with registration, the County provides instructions on their website.
For Spanish speakers, the portal is also available in Spanish: “Nuestro nuevo portal de clientes le brinda acceso completo a la informacion de su cuenta de agua. Visite slocounty.ca.gov/waterbill para resgistrarse.”
SLO County Water Bill Customer Support
Need help with your county water bill? The office staff is available:
- Phone: 805-781-5252
- Email: [email protected]
- Hours: Monday through Friday, 8am-5pm
The County Public Works Department, directed by John Diodati, oversees water services for these areas.
How to Pay Your Water Bill for City of SLO Residents
If you live within San Luis Obispo city limits, you’ll use a completely different system to pay your water and sewer bills.
City of SLO Online Payment Portal
The City of SLO uses the “Civic Pay Online” system for water and sewer bill payments. To access it, visit slocity.merchanttransact.com.
When using this system, you have three main options:
- Log In – For registered users with accounts
- Sign Up – To create a new account (recommended for recurring payments)
- One Time Payment – Make a payment without registering
I personally recommend creating an account if you’re gonna be living here for a while. It makes tracking your usage and setting up autopay MUCH easier!
Important Tips for City Water Customers
The City’s payment portal provides several helpful tips that I wish I’d known earlier:
- Your total account balance shown is current as of today but might not include pending transactions
- The online bill on the “My Bill” page is like a paper bill – it shows the last billed amount and won’t reflect recent adjustments/payments
- Automatic payments run about two weeks before the bill due date and take the entire balance
- To update preferences for bill delivery or saved payment methods, use the “My Profile” tab
- Service periods run from the 16th to 15th of each month
- 1 Con (unit of consumption) = 100 cubic feet = 748 gallons
City of SLO Customer Assistance Program
I think this is really important to mention – if you’re struggling to pay your water bill in the City of SLO, you might qualify for their Customer Assistance Program! Eligible participants receive a 20% discount on monthly water and sewer bills.
To learn more and apply, visit https://www.slocity.org/CAP
City of SLO Water Bill Customer Support
Need help with your city water bill? The office staff is available:
- Phone: 805-781-7133
- Email: [email protected]
- Hours: Monday through Friday, 8am-4pm
Understanding Your Water Consumption
One thing that really surprised me when I moved here was how water usage is measured. Both the City and County use “units of consumption” or “Cons” where:
1 Con = 100 cubic feet = 748 gallons
This is important to know when reviewing your bill! If your consumption seems unusually high, it’s a good idea to:
- Watch for sudden increases in usage
- Check irrigation systems for leaks
- Inspect toilets and other appliances
- Look into water conservation techniques
For water conservation info and drought updates in the City, visit www.slowater.org
Different Ways to Pay Your SLO Water Bill
Whether you’re a City or County customer, you’ve got options for how to pay your bill:
For County Residents (Shandon, Cayucos, Santa Margarita):
- Online: Visit slocounty.ca.gov/waterbill (fastest method!)
- Phone: Call customer support at 805-781-5252
- Email: Contact [email protected]
For City of SLO Residents:
- Online: Visit slocity.merchanttransact.com
- Phone: Call customer support at 805-781-7133
- Email: Contact [email protected]
Setting Up Automatic Payments
This has been a HUGE time-saver for me! Both systems allow you to set up automatic payments:
County AutoPay:
- Visit slocounty.ca.gov/waterbill
- Register for an account
- Select enrollment in automated payments
- Enter your payment information
City AutoPay:
- Visit slocity.merchanttransact.com
- Create an account (not a one-time payment)
- Go to “My Profile”
- Set up automatic payments
Just be careful with the City system – auto payments take the FULL account balance about two weeks before the due date. If you’re on a payment plan or don’t want the entire balance withdrawn, autopay might not be right for you.
New Residents: Starting Water Service
If you’re new to the area, here’s what you need to know:
For County Areas:
Contact County Public Works at:
- Phone: 805-781-5252
- Email: [email protected]
- Hours: Monday through Friday, 8am-5pm
For City of SLO:
If you’re trying to switch service into your name:
- Click the “Start/Stop Service” button on the payment website
- Fill out the application
- Receive account information
- Then you can sign up for payments on the site
Troubleshooting Common Water Bill Payment Issues
Based on my experience (and some frustrated calls to customer service), here are some common issues people face:
Browser Compatibility
The City’s Civic Pay system doesn’t support Internet Explorer. Use Chrome, Safari, Firefox, or Edge instead.
Billing Periods vs. Service Dates
On the City system, the service period always shows 16th to 15th, but to see exact dates, click on meter readings to expand and view the dates.
High Bills
If you notice unusually high consumption, check for:
- Leaks in irrigation systems
- Running toilets
- Dripping faucets
- Broken water lines
Account Access Problems
If you can’t access your account:
- County customers: Follow the instructions on slocounty.ca.gov
- City customers: Use the “Forgot Password” option or contact customer service
Final Thoughts
Paying your water bill in San Luis Obispo doesn’t have to be complicated once you know which system to use! The most important thing is knowing whether you’re a City or County customer, and then using the right payment portal.
I’ve found that setting up autopay and paperless billing has made things SO much easier for me – no more forgetting to pay or misplacing bills. Plus, both systems let you track your water usage, which is super helpful for conservation.
Have you had any issues paying your SLO water bill? Or any tips I didn’t cover? I’d love to hear about your experiences in the comments below!
Stay hydrated, SLO friends!
Disclaimer: This information was last updated in October 2025. Payment systems and contact information may change, so always check the official websites for the most current information.
NEW: Online Payment Portal
Our new customer portal gives you full access to your water account information. Visit slocounty.ca.gov/waterbill to register. You will be able to track your utility usage, pay your bill online, enroll in automated payments, sign up for paperless bill, and receive notifications on any device anywhere.
Nuestro nuevo portal de clientes le brinda acceso completo a la informacion de su cuenta de agua. Visite slocounty.ca.gov/waterbill para resgistrarse. Podra realizar un seguimiento de su uso de servicios publucos, pagar su factura en linea, inscribirse en pagos automaticos, inscribirse en una factura electronica y reciba notificacionesd en cualquier dispositivo en cualquier lugar.
For assistance with registering an account on our payment portal please follow these instructions.
SLO water and sewer bills increase, but not as high as expected
FAQ
What is the phone number for San Luis Obispo water bill?
Customers can obtain their balance or pay their water and sewer bill 24/7 using the City’s automated telephone payment system by calling (805) 781-7133 and pressing option #1.
Why is my water bill $400 today?
An unusually high water bill is most often caused by a leak or change in water use. Some common causes of high water bills include: A leaking toilet, or a toilet that continues to run after being flushed, most common. A dripping faucet; a faucet drip can waster 20 gallons or more of water a day.
What city is the abbreviation SLO?
City of San Luis Obispo, CA | City of San Luis Obispo | Home.
How often is the Sydney water bill?
| Customer type | Bills per year | Usage & billing period |
|---|---|---|
| Regulated and Greater Sydney | 4 | July to Sep (Q1) |
| Oct to Dec (Q2) | ||
| Jan to Mar (Q3) | ||
| Apr to June (Q4) |
