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Rand CWD Has Levels of Arsenic Above the Drinking Water Standard


Our water system recently violated a drinking water standard. Although this is not an emergency, as our customers, you have a right to know what you should do, what happened, and what we are doing to correct this situation.

We routinely monitor for the presence of drinking water contaminants.  Based on the samples reported on 4/25/2023 for Prather Well 1 and Prather Well 2 for the 2nd Quarter of 2023, water produced by Prather Well 01 contained an average of 23 ppb (parts per billion) and water produced by Prather Well 02 contained an average of 8.6 ppb.  One of our wells, (Prather Well 1) produces water that averages above the arsenic maximum contaminant level (MCL) of 10 ppb.  This standard is based upon the running annual average of the most recent quarterly arsenic monitoring.  Only Prather Well 02, however, is used to supply water throughout the water system.  Prather Well 01 is a standby well used only for non-potable bulk water and would only be used in the water system in an emergency. 

What should I do?

  • You do not need to use an alternative water supply (e.g., bottled water). 
  • This is not an emergency.  If it had been, you would have been notified immediately. However, some people who drink water containing arsenic in excess of the MCL over many years may experience skin damage or circulatory system problems and may have an increased risk to getting cancer.
  • If you have other health issues concerning the consumption of this water, you may wish to consult your doctor.


What happened? What is being done?

Although our main water supply was not in violation of the arsenic MCL this quarter, we have been in violation the past few quarters and need to work on remaining in compliance with the arsenic MCL standard. Rand CWD is working with the State Water Resources Control Board, Division of Drinking Water to resolve the high arsenic problem.  

For more information, please contact the office at: 760-374-2414

Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses).  You can do this by posting this public notice in a public place or distributing copies by hand or mail.

This notice is being sent to you by Rand Communities Water District.

State Water System ID#: CA1510016.  Date distributed: 05/23/2023