WaterSmart Toilets

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Toilet leaks are often silent and can waste hundreds of gallons of water per day, making the toilet the number one cause of a high-water bill. That is why it is important to test your toilet annually for leaks.  

WaterSmart Toilets
Web Header Dye Tab Challenge

To participate, follow the steps below: 

1. Test your toilets for leaks using free dye tablets available from your local water provider, or food coloring. 

2. Join the challenge by submitting the results of your leak test below through March 31, 2023.

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3. Keep your fingers crossed to win! Five (5) winners will be randomly chosen to receive one of five $25 Gift Cards.

Contest Rules:

To be eligible to enter or win these Drawings you must be at least 18 years of age and:

  • A resident of Sonoma County whose water is supplied by the California American Water – Larkfield, City of Cloverdale, City of Cotati, City of Healdsburg, City of Petaluma, City of Rohnert Park, City of Santa Rosa, City of Sonoma, Valley of the Moon Water District, Town of Windsor; or
  • A resident of Marin County whose water is supplied by North Marin Water District or Marin Water.
Check for Leaks

How to Check Your Toilet for Leaks:

Place a few drops of food coloring (or use free dye tabs) in your toilet tank, wait 15 minutes, if the water in the bowl changes color, you have a leak. If it doesn't, you can rest easy knowing you don't have a leaky toilet.  

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Request free dye tabs to be mailed to your house

Or pickup free toilet dye tabs Monday through Friday 8:00 a.m. to 5:00 p.m. at City of Santa Rosa offices at 69 Stony Circle or 90 Santa Rosa Avenue, Santa Rosa.

How to Check Your Toilet for Leaks (VIDEO)

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How to Use Dye Tabs When Checking for Toilet Leaks (PDF)

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Identifying Toilet Leaks

Leaking Flapper:

A misaligned or warped flapper that is not creating a seal between the toilet tank and bowl is the most common toilet leak. Santa Rosa Water offers FREE replacement toilet flappers to help you fix your flapper leak. 

Home flapper

Pick up FREE replacement flappers

Overflowing Fill Valve:

The porcelain tank lid can mask the sound of a slowly running fill valve, so lift the tank lid and look and listen for water movement.  Check the adjustment screw on the fill valve to ensure optimum water level is at ¾” below the top of the overflow tube.

Leaking Overflow Tube:

Sprinkle a small amount of any powder, like 1/4 teaspoon flour, on the water in the tank. If the power starts moving towards the overflow tube then you have an overflow leak.

Running Toilet

Jiggling the handle? If so, the chain, flush lever, or handle could be sticking and causing the toilet to run.

Upgrade Toilet

Is your toilet leaking and beyond repair? Does it use 1.6 or more gallons per flush?    


Replace your 1.6 gallon per flush (or more) toilet with a new WaterSense labeled high-efficiency toilet and receive a rebate of up to $75 per toilet. A pre-inspection is required. Toilets already removed are not eligible. For details, visit: srcity.org/rebates

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High-efficiency toilet models


In late 2023, Santa Rosa Water anticipates providing a limited number of free toilets and free installation to replace 1.6 gallons or more per flush toilets to Santa Rosa Water customers. The total number of toilets available to be replaced will depend on grant funding and is not known currently. As more details about this program are announced, this page will be updated. If you want to be updated when this program launches, sign up here.