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The Byron Sanitary District (BSD) was formed in 1948 per the guidelines as stipulated in the Sanitary District Act of 1923 Health and Safety Code Sec 6400 et seq. The District was formed primarily because of the high-water table in the area and the septic tanks which were placed too close in proximity to the wells, causing contamination of the drinking water.

District Overview

The Byron Sanitary District provides sewer collection, wastewater treatment services and disposal service for the unincorporated, historic Byron community, serving approximately 800 customers. The District also serves the needs of customers included in any present or future out-of-District service contracts. The Byron-Bethany Irrigation District (BBID) provides operation and maintenance, as well as administrative services for the Byron Sanitary District. BBID is instrumental in making staff available for emergency services for BSAN, such as power outages and other unforeseen events.

District Facilities

The District conveys wastewater through a gravity flow collection system which consists of approximately 4.5 miles of pipeline within the service area. The collection system terminates into the headworks at the plant for initial treatment. After primary treatment, the effluent flows into a series of ponds to be further processed utilizing percolation and evaporation.

In 2007, the District sought and gained the necessary funding for a major wastewater plant improvement project. The funding was obtained with the issuance of the Series 2007A Revenue Bonds issued by the Byron-Bethany Joint Powers Authority. The project included new headworks, a SCADA system, upgraded valving, grading, fencing, and pond and levee improvements.

District Service Area

The service area of the District is defined on the Byron Sanitary District Boundary and SOI map (below), which was created by the Contra Costa County Department of Conservation and Development, GIS Group and approved by LAFCO action on 6/11/2014. The number of Equivalent Dwelling Units (EDU) is currently 372.

Byron sanitary district: By the numbers
  • Year Formed: 1948
  • Area Served: Byron community
  • Population Served: 800, per Contra Costa County Dept. of Conservation & Development
  • Registered Voters: 346 as of January 2023
  • Size: Approximately 0.53 square miles
  • Services provided: Sewage treatment, collection and disposal for the Byron community