Process water projects completed

Project Description - COMPLETE


An NPDES permit is required to return water generated by PID’s backwash and flushing processes into Magalia Reservoir. When the permit was last renewed, the new discharge limits placed on levels of aluminum and dichlorobromomethane meant that the district’s current treatment processes could no longer meet the requirements.

Aluminum comes from a product we use as a coagulant to encourage dirt particles to stick together for better clarification. Dichlorobromomethane is a byproduct of our chlorination prior to filtration. The chlorine reacts with organic material and results in the formation of dichlorobromethane.

Requirements for PID’s National Pollution Discharge Elimination System (NPDES) permit are expected to change; a project to create an improved processing facility was deferred as a result of the financial impacts of the 2018 Camp Fire. The District has successfully worked with the State Regional Board to establish appropriate and acceptable discharge limits.




Spending Plan

Project Phase Previous Fiscal Year Expenses  Fiscal Year 15/16  Fiscal Year 16/17  Fiscal Year 17/18  Fiscal Year 18/19  Fiscal Year 19/20 Total
Planning $749,155  -   -  $99,556 - - $848,711
Design - $896,942 $418,430 - -  -  $1,315,372
Construction  -   -   -   -  - - -
 Total $749,155 $896,942 $418,430 $99,556 - - 2,164,083

Project Manager

  • Bill Taylor
    Department: Water Treatment

Funding Source

  • Operations

Project Status

completed icon Complete

PID's board considered these alternatives

Option 1—Recycle the process water with a new treatment system and no longer discharge water—thus eliminating the need for a required NPDES.
Option 2—Work with the state Regional Board to establish appropriate discharge limits that ensure discharged water is not harmful to the environment or to humans and renew the NPDES permit under that new understanding. Additionally, the new NPDES permit will guide the district in planning construction of necessary treatment or recycling facilities.

PID’s board voted to pursue Option 2 and has hired a consultant with successful experience in NPDES review and renewal to assist in this process.


Benefits to PID and its Customers

Option 2 can conceivably save the district and its customers hundreds of thousands of dollars in construction and operating costs.


Project Info


Project details updated October 2020

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