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King County Septic System Maintenance and Side Sewer Repair Rebate Program
We want to help you make sure your wastewater system is functioning properly to protect your family, your property, and the environment.
We are offering rebates for qualifying septic system and side sewer maintenance activities (see restrictions in the table below). One rebate is available per parcel.
The side sewer repair rebate is available for eligible homes in the Lakehaven and Midway Sewer Districts. The septic system rebate is available throughout King County, with more rebates available to properties on Vashon-Maury Island and within the Poverty Bay Shellfish Protection District. There is also an income eligibility requirement for properties in King County, outside of Vashon-Maury Island and the Poverty Bay Shellfish Protection District.
If you need language assistance, please contact picrebates@kingcounty.gov.
Are you interested in applying for the septic system maintenance rebate?
Are you interested in applying for the side sewer repair rebate?
| Type of rebate | Rebate amount | Eligible geographical area | Income eligibility requirements | Eligible maintenance activities |
|---|---|---|---|---|
| Septic system maintenance rebate | Up to $500 | Vashon-Maury Island AND within the Poverty Bay Shellfish Protection District | None | Septic system inspection, pumping, or riser installations |
| All of King County, excluding Vashon-Maury Island and the Poverty Bay Shellfish Protection District | Annual household income at or below 80% of King County’s area median income. | |||
| Side sewer repair rebate | Up to $5,000 | Lakehaven and Midway Sewer Districts | None | Disconnecting illicit connections (ex. roof downspouts or sump pumps), lining sewer pipes, or making repairs to existing side sewers to eliminate stormwater or groundwater inputs. |
Check your eligibility for a septic system or side sewer rebate
Who qualifies for income-based septic system maintenance rebate?
If your property has a septic system and is within King County, but not on Vashon-Maury Island or within the Poverty Bay Shellfish Protection District, then you are eligible for up to $500 in eligible septic maintenance activities if your annual household income is at or below 80% of King County’s area median income. Use the table below to determine the maximum median family income that qualifies based on your household size.
| Household size | 80% of King County’s Area Median Family Income |
|---|---|
| 1 | $70,650 |
| 2 | $80,750 |
| 3 | $90,850 |
| 4 | $100,900 |
| 5 | $109,000 |
| 6 | $117,050 |
| 7 | $125,150 |
| 8 | $133,200 |
Why should I apply for the rebate?
- Save money! These septic system and side sewer rebates go directly to the contractors you hire to do the work. This means you do not have to pay the qualifying rebate amount upfront and wait to get reimbursed — an automatic savings!
- Keep you and your family healthy — Household wastewater is loaded with bacteria and viruses. Overlooking (or delaying) septic or side sewer maintenance poses harmful health hazards that can lead to illness or disease. A properly functioning septic system or side sewer helps remove these pollutants so well water and nearby waterbodies aren’t contaminated.
- Protect the environment — Failing wastewater systems release bacteria, viruses, and other materials that can enter streams, rivers, lakes, Puget Sound, and the ocean. The pollutants harm local ecosystems and can harm native plants, fish, and shellfish, and the people who eat them.
- Protect your property value — An unusable septic system, or a side sewer in disrepair, lowers your property value. When you sell your home, you’re legally required to disclosing a septic system failure (RCW chapter 64.06). It can also be an expensive liability if you have to repair or replace the system, which costs around $15,000 to $40,000.
Interested in applying for a rebate?
Start a septic system maintenance rebate
Start a side sewer repair rebate
These rebate forms are also available in the following languages:
- 金县化粪池系统维护回扣表 (Chinese, Simplified)
- 金縣化糞系統維護回贈表格 (Chinese, Traditional)
- 킹카운티 정화조 시설 관리 리베이트 양식 (Korean)
- Форма возмещения расходов на обслуживание септических систем в округе Кинг (Russian)
- Foomka Barnaamijka Qiimo-dhimista Dayactirka Nidaamka Bullaacad-mareennada ee King County (Somali)
- Formulario de reembolso (rebate) por mantenimiento de fosas sépticas del condado de King (Spanish)
- Đơn Xin Giảm Giá Bảo Trì Hệ Thống Tự Hoại Quận King (Vietnamese)
- Poverty Bay 배수 설비 수리 환불 양식 (Korean)
- Formulario para obtener el rembolso (rebate) por reparar el drenaje de su propiedad (Spanish)
- Đơn Xin Giảm Giá Sửa Chữa Cống Thoát Nước của Poverty Bay (Vietnamese)
This project has been funded wholly or in part by the United States Environmental Protection Agency under assistance agreement PC-01J89801-1 to the Washington State Department of Health. The contents of this document do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.