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Lake County Sanitation District (LACOSAN or District) provides sewer service to Middletown, California in southern Lake County. The Middletown Wastewater Treatment Plant (WWTP) is located adjacent to Putah Creek, approximately two miles west of downtown Middletown at 20126 Highway 175. The WWTP service area includes the sewered portions of Middletown and Harbin Hot Springs. The WWTP and associated sewer collection system were placed into service in 1992 to provide its service to downtown Middletown businesses and residences.

The purpose of the analysis was to conduct a rate study which evaluates the District’s current rates and financial data, and propose new rates if necessary that meet the District’s financial and strategic goals.

Linked below are the Financial Planning Revenue Requirements and Rate Setting Analysis document as well as the Public Notice for the Public Hearing to consider a sewer rate increase.  If you have questions concerning either of these documents or the process in general please contact Jesse Salmeron, Deputy Administrator – Fiscal, or Scott Harter, Administrator at our administration office.  

Middletown Ordinance No 3127 (PDF)

General Information

We do have a drop box available at the front entrance for payments and also have electronic payment options as well. To make a payment by phone call 844-508-3523 (a service charge of $2.95 applies to electronic payments. This is charged by the company that manages the payments and supplies the service-not by Special Districts)

If you have special needs and require exceptions to this request, please call 707-263-0119 and we will do what we can to accommodate you.

• We will be providing general updates relating to our systems and customers via our Lake County Special Districts Facebook page as changes or events come up. 
• Just a friendly reminder to all Lake County Special Districts customers, if you are experiencing a Water or Sewer Emergency outside of normal business hours please call our main office number at 707-263-0119 and our After Hours Answering Service will assist you by immediately contacting our staff. Lake County Special Districts always have staff ready to make sure our community remains safe and healthy!

Everyone stay healthy and safe.

Pay Bill Online or by Phone

Visit our Customer Portal to pay your bill online.

To make a payment by phone dial: 844-508-3523

Please allow up to 48 hours for your payment to post to your account.

• A $2.95 Service fee per transaction will be charged to your card by Paymentus.
• Maximum transaction amount $375.