The NBRID Sewer collection system consists of the pipe system and lift stations responsible for conveying raw sewage and wastewater from homes to the District’s Treatment plant. The pipe network contains ~ 29,000 ft of varying diameter pipe, 147 manholes, and four lift stations.
Sewer Treatment, Storage, and Disposal
The District's original sewer treatment plant was replaced in 2013. The new plant is a MicroBlox Membrane Biological Reactor (MBR) treatment system that includes an additional membrane treatment unit called StormBlox that is only used in the winter when incoming flows exceed the capacity of the MBR unit.
When flows enter the treatment plant headworks from the collection system, it first flows through a drum screen where rags, wipes, and other non-flushable items are collected and disposed of. From the drum screen, the waste flows through two equalization basins before entering the MBR unit. Sludge is wasted from the MBR unit into two dewatering bags, where the sludge is thickened and disposed of at a landfill once dry. The liquid from the bags is captured and sent through the treatment system again.
From the MBR, treated effluent is disinfected and sent from the sewer plant to the pond area for storage and disposal.
Sewer Storage and Disposal Area
Four hypalon lined ponds, totaling 24 MG, are used to store treated wastewater from the MBR before it is discharged to land through the District’s ~ 60 acre land application area/sprayfield through a pump station located onsite.
Additionally, Ponds 2, 3, and 4 are also equipped with a perimeter evaporation system that can be used year round for continuous disposal of wastewater as allowed by our regulatory permit.
Reporting a Sewer Spin
Before reporting a problem, please note the following:
Where is the spill located – curb, corner, street, other?
Is water pooling, trickling, or flowing down the street?
Is there construction activity nearby?
How long have you noticed the problem?
Then call the District main office at (707) 259-8600, or the District’s operations team at (916) 584-1893.