Washington State Toilet Rebate 2026: Save Up to $100

What Is the Washington State Toilet Rebate Program?

Washington has been among the most active states for residential water-efficiency rebates since the early 2000s, when utilities began phasing out the old 3.5 GPF and 5.0 GPF tank toilets that date from before the 1992 federal mandates took effect. The Energy Policy Act of 1992 set 1.6 GPF as the federal maximum, but a large stock of pre-1994 fixtures still operates across Puget Sound neighborhoods, Eastern Washington cities, and rural communities.

Replacing one pre-1994 toilet with a 1.28 GPF EPA WaterSense-certified model saves roughly 4,000 to 7,000 gallons per person per year, depending on household size and usage patterns (EPA estimates). At Seattle Public Utilities' typical residential rate structure, that equates to a meaningful reduction on the quarterly water bill -- and the rebate accelerates the payback period on a new toilet purchase considerably.

Which Washington Water Utilities Currently Offer Toilet Rebates?

Note: Rebate programs are subject to annual budget cycles and may close early if funds are exhausted. Always verify current availability directly with your utility before purchasing. The amounts above reflect published program data as of mid-2026 and are subject to change.

How Do You Qualify for a Toilet Rebate in Washington State?

The most common reason rebate applications are rejected is missing documentation. Utilities typically require all of the following:

• Proof of purchase: Original itemized receipt showing date of purchase, store name, model name or model number, and the price paid.
• WaterSense product label or confirmation: The EPA WaterSense hang-tag or packaging label, or a printed copy of the product's listing from the EPA WaterSense product search at epa.gov/watersense.
• Rebate application form: Downloaded from the utility's website, or requested by phone. Most utilities now accept PDF submissions by email.
• Utility account information: Your service address and account number as it appears on your water bill.
• Old toilet disposal: Some utilities require a photo of the old toilet with the cistern cracked or drilled through to confirm it has been decommissioned. Others accept a written statement.

Which Toilet Models Qualify for Washington State Rebates?

Below is a detailed look at the most popular qualifying models purchased by Washington homeowners, based on aggregated retailer sales data and owner review patterns across Home Depot, Lowe's, and Amazon.

#3

Best Dual-Flush

TOTO Aquia IV Dual-Flush Toilet (0.8 / 1.28 GPF)

4.7 Best for: Households aiming for the deepest water savings and lowest quarterly bills

The TOTO Aquia IV carries EPA WaterSense certification and delivers a dual-flush 0.8 GPF light flush and 1.28 GPF full flush -- making it the highest water-efficiency option that still qualifies for Washington utility rebates, and saving even more water than the already-efficient single-flush 1.28 GPF models.

Flush Volume0.8 / 1.28 GPF

MaP Score800 g (full flush)

EPA WaterSenseYes

Bowl ShapeElongated

CeFiONtect GlazeYes

Pros

• Dual-flush 0.8/1.28 GPF -- maximum water savings
• WaterSense certified; rebate-eligible statewide
• CeFiONtect glaze on the cotton white and bone finishes
• Universal height for comfort and ADA accessibility

Cons

• 800g MaP (full flush) is lower than the Drake II's 1,000g
• Two-button flush requires user adjustment if coming from a single-flush toilet

The Aquia IV uses TOTO's Dynamax Tornado Flush technology, which eliminates the traditional rim holes found in older toilet designs and replaces them with two nozzles at the rim that create a powerful centrifugal rinsing action. This design keeps the rim virtually clean without the mineral buildup that accumulates in conventional rim holes -- a meaningful maintenance advantage in Washington's harder-water eastern counties.

At 0.8 GPF for the light flush, the Aquia IV uses 50 percent less water per flush than the pre-1992 federal maximum and 37.5 percent less than the current 1.28 GPF WaterSense standard. In a household that uses the 0.8 GPF option for the majority of flushes, annual water savings over a pre-1994 toilet can reach 10,000 to 15,000 gallons -- translating to a more substantial reduction in the quarterly water bill than a standard 1.28 GPF replacement.

Expert Take

The Aquia IV is one of the few dual-flush toilets that passes the EPA WaterSense MaP performance threshold on both flush modes. Many dual-flush toilets on the market carry WaterSense certification on the full flush only and struggle with liquid waste on the low flush. TOTO's engineering on the Aquia IV produces adequate clearance on 0.8 GPF in real-world conditions, which is what distinguishes it from lower-cost dual-flush alternatives.

Check price on Amazon

Bottom Line: The TOTO Aquia IV is the smart choice for water-conscious Washington households that want rebate eligibility and the deepest achievable water savings in a single purchase.

#4

Best Budget Pick

American Standard Cadet 3 Toilet (1.28 GPF)

4.6 Best for: Budget-conscious Washington households replacing multiple old toilets

The American Standard Cadet 3 delivers EPA WaterSense certification, a MaP score of 1,000 grams, and a fully glazed 3-inch accelerator flush valve at a lower purchase cost than the TOTO alternatives -- making it the most cost-effective rebate-eligible option for households replacing two or three toilets simultaneously.

Flush Volume1.28 GPF

MaP Score1,000 g

EPA WaterSenseYes

Bowl ShapeElongated or Round

Flush Valve3-inch PowerWash rim

Pros

• 1,000g MaP score -- maximum performance rating
• WaterSense certified for all WA utility rebates
• Lower purchase cost makes multi-toilet replacement more affordable
• Available in round and elongated bowl versions
• 12-year warranty on the flushing system

Cons

• Porcelain finish is less refined than TOTO's CeFiONtect surface
• Tank lid fits loosely on some units per owner reports

The Cadet 3 has been in continuous production since 2004 and is one of the most widely sold gravity-flush toilets in Washington State. American Standard's 3-inch PowerWash rim design uses a large-diameter flush valve to generate a high-volume burst of water in the first second of the flush cycle, which is what enables strong solids clearance at 1.28 GPF without a pressure-assist mechanism.

Households replacing two or three older 3.5 GPF or 5.0 GPF toilets can combine the utility rebate (up to $200 from Seattle Public Utilities, for example, at $100 per toilet up to two) with the Cadet 3's lower purchase cost to achieve a very favorable total cost of ownership over a TOTO option at a higher unit price. For rental properties, multi-unit buildings, or large homes, this math often determines the purchase decision.

Expert Take

The Cadet 3's 12-year warranty on the flushing system is longer than many competitors at this price tier and covers internal components including the 3-inch flush valve and the EverClean surface glaze. American Standard's EverClean surface inhibits the growth of mold, mildew, and bacteria, which helps maintain bowl appearance between cleanings -- a practical advantage for rental properties where cleaning schedules may be less consistent.

Check price on Amazon

Bottom Line: The American Standard Cadet 3 is the best value rebate-eligible toilet in Washington State -- a maximum MaP score and WaterSense certification at a purchase cost that makes multi-toilet replacement genuinely affordable after rebates are applied.

How Much Water and Money Will the Rebate Plus New Toilet Save You?

The math on Washington State toilet rebates becomes more compelling when the utility rebate, the water savings, and the sewer savings are considered together. Seattle Public Utilities, like most Washington utilities, charges for sewer service based partly on winter water consumption. A lower total water use means both a lower water charge and a lower sewer charge over time.

*Many WA utilities require replacement of pre-1994 (3.5 GPF) toilets to qualify. Replacing a 1.6 GPF toilet may not qualify for the full rebate at all utilities. Confirm with your utility. Bill savings are estimates based on published utility rate structures and EPA consumption data.

For households replacing a pre-1980 toilet -- which may use as much as 5.0 to 7.0 gallons per flush -- the water savings are even more dramatic. An older 5.0 GPF toilet replaced by a 1.28 GPF model in a four-person household can save over 100 gallons per day, totaling more than 36,000 gallons annually. In drought years, which have become more frequent in Eastern Washington, that reduction has environmental significance beyond the financial savings.

How Do You Find and Contact Your Washington Utility for a Rebate?

Washington has more than 3,000 regulated water systems, ranging from Seattle Public Utilities serving more than 400,000 customers to small community systems serving fewer than 25 connections. Rebate programs are most common at larger Group A systems (serving 25 or more connections year-round), but many mid-size cities and small municipal utilities also offer them, particularly in the Puget Sound region.

When contacting your utility, have the following information ready:

• Your water service account number (from your water bill)
• The service address where the toilet will be installed
• The model name and model number of the toilet you are planning to purchase
• A copy of the product's WaterSense listing (available at epa.gov/watersense) to confirm eligibility before purchasing

Several Washington utilities allow you to pre-qualify your toilet selection before purchase, which eliminates the risk of buying a model that turns out not to qualify. Seattle Public Utilities, for example, maintains a published list of pre-approved WaterSense models on their conservation rebate web page. Confirming your model appears on the utility's approved list -- or verifying it appears on the EPA WaterSense product database -- before purchasing is the most common piece of advice utility conservation staff give to applicants.

For more guidance on what EPA WaterSense certification means and how it differs from standard GPF ratings, and to understand the full picture of how much water toilets use by model and age, see our dedicated guides in the water efficiency cluster.

If you are uncertain whether your current toilet qualifies as the older model being replaced, the date code stamped inside the tank lid (on the underside) indicates the manufacture date. Toilets manufactured before January 1994 are almost certain to use 3.5 GPF or more. The date stamp format varies by manufacturer but typically appears as MMYYYY or as a Julian date code.

Step-by-Step: How to Apply for a Washington State Toilet Rebate

The process is straightforward, but each step must be completed in order. Missing any single piece of documentation is the most common cause of delays and rejections.

1. Verify your utility participates. Log in to your water bill account online, or call the customer service number on your bill, and ask whether a toilet replacement rebate is currently available and funded. Programs can close mid-year if the annual rebate budget is exhausted.
2. Download the rebate application form. Most Washington utilities post the form on their conservation or sustainability web page. If you cannot find it online, ask customer service to mail or email it to you.
3. Verify your chosen toilet model is WaterSense certified. Search the EPA WaterSense product database at epa.gov/watersense using the manufacturer name and model number. Screenshot or print the results page to include with your application.
4. Purchase the toilet and keep every piece of documentation. Retain the original itemized receipt, the WaterSense hang-tag from the packaging, the box itself (which lists the model number), and any installation instructions that include the GPF specification.
5. Install the toilet. Whether you install it yourself or hire a plumber, the installation must be complete before most utilities will accept the rebate application.
6. Photograph the old toilet before disposal. Some utilities require evidence that the old toilet was decommissioned. A photograph of the old tank with a visible crack or hole through it, or the tank and bowl separated and left for bulk waste pickup, typically satisfies this requirement.
7. Complete and submit the rebate application. Fill in all fields including your account number, service address, purchase date, toilet model and manufacturer, and the rebate amount requested. Attach all supporting documentation: receipt, WaterSense confirmation, and old toilet disposal evidence if required.
8. Track your application. Most utilities assign a confirmation number or send an email acknowledgment. Keep the confirmation until the rebate check arrives and clears.

For related guidance on selecting the right model, see our complete toilet buying guide and our overview of how much you can save by replacing an old toilet in terms of both water cost and avoided repair costs.

Washington Toilet Rebate vs. Other State Programs: How Does WA Compare?

Washington State's utility-administered rebate structure is similar to California's model, where individual water agencies administer their own rebate programs rather than a single state-level program. The advantage of this structure is that utilities can tailor programs to local water scarcity conditions and budget cycles. The disadvantage is that residents need to research their own utility rather than applying through a single state portal.

By comparison, states such as Arizona, Nevada, and Colorado have more centralized water conservation incentive structures, in some cases offering additional state-level co-funding that supplements local utility rebates. Washington's relatively abundant Puget Sound water resources historically reduced the urgency for statewide water conservation mandates at the residential level -- but the increasing frequency of summer drought conditions in Eastern Washington has prompted more utilities to expand their rebate budgets in recent years.

For Washington households in the Spokane, Tri-Cities (Kennewick, Richland, Pasco), or Yakima areas, where summer water restrictions have become more common due to reduced snowpack in the Cascades, the toilet rebate represents both a financial benefit and a contribution to regional water security. Utilities in these areas have in some cases offered higher rebate amounts per toilet or extended application windows to accelerate adoption of WaterSense fixtures.

It is also worth noting that some Washington utilities pair the toilet rebate with rebates for other water-efficient fixtures including high-efficiency clothes washers (front-loading models that use less water per cycle), low-flow showerheads, and smart irrigation controllers. If you are already planning a toilet replacement, checking whether your utility offers a bundled or additional rebate for other fixtures at the same time can increase the total rebate value from a single application cycle.

See also our guide to how to save water with toilets for additional strategies beyond rebate-driven replacement, including toilet maintenance practices that prevent water loss from running or leaking tanks.