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The Community Services District on Friday mailed community members a notice about a violation in contaminant standards for our drinking water. The CSD board discussed the violation at its February meeting and said a followup letter to the community was likely.

The letter, which you can download here, makes the following points:

  • The CSD routinely tests for problems in the drinking water it produces. 
  • Tests between February and November last year found the levels of Total Trihalomethanes (TTHM) to be 81 micrograms per liter, when the maximum allowable level is 80.
  • You don’t need to boil your water or take any corrective action. But if you have specific health concerns, you should see your doctor.
  • CSD is making operational changes as a result of the finding. Already, TTHM has dropped “significantly” in tests.
  • No immediate action is required of consumers. Had there been a need for action, the CSD would have notified residents immediately.

At February’s board meeting, Paul Siebensohn, CSD director of field operations, identified TTHM an occasional byproduct of water disinfection with chlorine.  The substance is a carcinogen. “It’s not an acute water quality concern,” he told the board. “It’s a potential to be a concern if ingested at high volumes over a long period of time,” which is what the Environmental Protection Agency says as well.

Siebensohn said the biggest concern with such substances is at the farthest points in the water distribution system, where the water ages, so the CSD gathers its testing samples four times a year at the district warehouse, which is behind the CSD Building, and at the end of Cantova Way.

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