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Sewer Services

We Accept Credit or Debit Card payments that can be made through our QuickBooks payment process online from you emailed invoice only.  Instructions are on your invoice that is Emailed to you.  We also accept checks, money orders, e-checks by mail or in person.  Cash too, in person.

We can also set up an Automatic Payment from your Credit or Debit Card - This is a FREE service to pay your sewer service invoice.  You will still continue to receive your invoice at the beginning of each quarter then automatic debits occur on the 5th or 10th of the month (your choice).  This will give you time to preview your bill and contact us with any questions.  

Please call the office for any questions at 503-355-2732 or email at office.twinrockssanitary@gmail.com

Sewer Service - Quarterly 

The cost for sewer services is $149.94* per quarter (starting July 2023).  We email or mail billings on the 1st day of the quarter: January, April, July and October.  Payment is due by the 25th of the month the invoice is sent out.

For customers who are on a fixed income  we will continue to honor monthly payments at $49.98 a month. 

​Sewer Service Fee – Resolution #22/23-9

"There will be a 2% increase in the Sewer Fees for the Fiscal Year 2023/2024 (July 1, 2023 – Jun 30, 2024). The last increase in rates was in FY 09/10 - July 2009."  

*Fee is based on number of EDUs per property.  EDU or “Equivalent Dwelling Unit” is the charge calculated for sewer services imposed upon each improved property serviced by our sewer system.

Sewer Service - Annual 

The cost of sewer service annually fee is $599.76*.  For making an annual payment, Twin Rocks Sanitary District offers a 5% Discount if payments are received within 30 days of invoicing on Annual Invoices.  If a payment is not received by the 30th of the month, the discount will be charged back to your account. 

Amount due with discount is $569.77.  This is billed on the yearly cycle on a quarter month for your account - January, April, July or October

​Sewer Service Fee – Resolution #22/23-9

"There will be a 2% increase in the Sewer Fees for the Fiscal Year 2023/2024 (July 1, 2023 – Jun 30, 2024). The last increase in rates was in FY 09/10 - July 2009."

*Fee is based on number of EDUs per property.  EDU or “Equivalent Dwelling Unit” is the charge calculated for sewer services imposed upon each improved property serviced by our sewer system.

SDC Fees and Sewer Connections 

When planning New Construction first choose your contractor and follow any permitting requirements and regulations for Tillamook County.

Before you can connect to the Twin Rocks Sanitary District, you must apply for a Sewer Connection Permit with Twin Rocks Sanitary District.   At the time you apply for the permit you must submit payment for the System Development Connection Fee (SDC Fee) of $5,340.00 along with the Connection Inspection Charge of $200.00.  *Fees are subject to change by action of the Board of Directors.

Please notify Twin Rocks Sanitary District when you plan to start installation.  Call us when you are ready to connect to our sewer lines at 503-355-2732, so we can do our inspection on the lines connecting to our lines.

Twin Rocks Sanitary District requires notification from the Property Owner when Tillamook County has completed the Occupancy Permit for the construction on the property.  When occupancy is permitted Twin Rocks Sanitary District can start the sewer service and the sewer service fee for the property and the property can be occupied.

If you are tearing down and/or removing an existing home or if a home/building once existed on the property please call to receive any details on SDC fees, Sewer Connection fees, or Sewer Service Fees.

Let us know if you have any question, please call the Twin Rocks Sanitary District office at 503-355-2732

May contain: soil and person