Central Oregon Septic Assistance Program

Central Oregon Septic Assistance Program (COSAP) offers financial aid for Crook, Deschutes, and Jefferson County homeowners at or below moderate income level who need to repair or replace septic systems.

COSAP is a program administered by the Central Oregon Intergovernmental Council with assistance from the COSAP Steering Team. COSAP was made possible thanks to a grant award from the Oregon Department of Environmental Quality’s Onsite Septic Financial Aid Program.

Applications for Crook, Deschutes, and Jefferson Counties are closed.

The application for COSAP’s second round of funding is now open for applicants from the Confederated Tribes of Warm Springs. Click below!

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Homeowners in Crook, Deschutes, Jefferson Counties and within the Confederated Tribes of Warm Springs may be eligible for a grant to repair/replace their septic system, or connect to a sewer line if:

  • They have a failing septic system
  • Their systems are non-compliant and post an imminent risk to public health and/or are likely to result in significant environmental impact

Tri-county applicants with household incomes at or below the income* figures listed in the table below will be prioritized for this round of funding. For questions about income, please contact your sanitarian or COIC through the listed methods at the end of this page.

Members of the Tribes, please see your application for income guidelines.

Maximum Eligible Incomes by Household Size*


County Persons in Household
1 2 3 4
Crook $51,120 $58,380 $65,700 $72,960
Deschutes $64,020 $73,140 $82,260 $91,380
Jefferson $51,120 $58,380 $65,700 $72,960

*COSAP uses 120% of HUD’s Community Development Block Grant definition of Low to Moderate Income (LMI).

Income limits are different for the Tribes. Please refer to the application for more details.

If your household size is greater than 4, please contact us for assistance.

Available Grant Awards:

Grants may cover up to $20,000 for standard systems or up to $30,000 for an alternative system.

Grants may cover septic repairs or replacements that have occured after January 1, 2023.

Frequently Asked Questions

What is the application process?

Please click the appropriate boxes above to submit your application. Applications will be reviewed after the closing date and homeowners will be notified shortly thereafter.

I have already paid for work on my septic system. Am I eligible to apply for reimbursement?

Homeowners are able to apply for eligible reimbursements for repairs that occurred during any time during 2023. Please specify the amount and the timeframe of work in your application.

Can I apply as a small business owner?

During this first round of applications, we will not be accepting applications from small business owners.

How will my income be determined?

COSAP uses 120% of area low to moderate income (LMI), based upon the U.S. Department of Housing and Urban Development’s (HUD) definition of LMI. HUD’s definition of LMI is 80% median family income.

Within the application, you will be asked to submit your most recent tax return. If you are unable to supply a tax return, please submit three months’ paystubs or Social Security statements.

Who counts as a member in my household?

For determining income, COSAP uses your financial dependents listed in your most recent tax returns.

COSAP will also ask for the number of people living in your home (including tenants, relatives, and non-relatives) to determine the load on your septic system. This will help us score applications.

Please reach out to septic@coic.org with assistance.

Contact Us

Contact your county sanitarian
Crook Chris Haindel – christopher.haindel@co.crook.or.us
Deschutes  Todd Cleveland – todd.cleveland@deschutes.org
Terrebonne Kristin Yurdin –
Redmond Lindsey Cromsigt –
Jefferson Matt Puntney –
General Comments or Questions?

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Give us a call

(541) 508-9669

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