Portola Reporter Public Notices for the week of 3/7/18


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Bacteriological Requirements not met for

Grizzly Lake CSD – Delleker

Domestic Water System

Our water system recently violated a drinking water standard. Although this incident was not an emergency, as our customers you have the right to know what happened and what we did to correct the situation.

We routinely monitor for drinking water contaminants. During December 2017, we collected 10 samples to test for the presence of coliform bacteria. Two of the samples showed the presence of total coliform bacteria. The standard is that no more than one sample per month may show the presence of total coliform bacteria.

What Should You Do?

You do not need to boil your water or take other corrective actions.

This is not an emergency. If it had been, you would have been notified immediately. Total coliform bacteria are generally not harmful themselves. Coliforms are bacteria which are naturally present in the environment and are used as an indicator that other, potentially harmful, bacteria may be present. Coliforms were found in more samples than allowed and this was a warning or potential problems.

Usually, coliforms are a sign that there could be a problem with the system’s treatment or distribution system (pipes). Whenever we detect coliform bacteria in any sample, we do follow-up testing to see if other bacteria of greater concern, such as E. coli, are present. We did not find any of these bacteria in our subsequent testing, and further testing shows that the problem has been resolved.

People with severely compromised immune systems, infants, and some elderly may be at increased risk. These people should seek advice about drinking water from this health care providers. General guidelines on ways to lessen the risk of infection by microbes are available fro U.S. EPA’s Safe Drinking Water Hotline at 1 (800) 426-4791. If you have other health issues concerning the consumption of this water, you may wish to consult your doctor.

What happened? What Was Done?

When a routine bacteriological sample collected from our distribution system is found to contain total coliform bacteria, we are required to collect additional samples from the distribution system during the month in order to determine if there is a contamination problem in the water system.

On December 4, 2017, a routine bacteriological sample we collected from the District’s distribution system was found to contain total coliform bacteria. Five repeat samples were then collected on December 6, 2017: one from each of our well sources and three from the distribution system. One of the distribution system repeat samples was found to contain total coliform bacteria. The water system was then disinfected and flushed. Four additional samples collected on December 28, 2017, were absent of total coliform bacteria. In addition, all samples collected in January 2018 were also absent of total coliform bacteria. Therefore, it appears the contamination has been eliminated. No cause for contamination was immediately found.

For more information, please contact:

Larry Terrill, Board Chairman,

Grizzly Lake CSD at (530) 832-5225.

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.

Secondary Notification Requirements – Upon receipt of notification from a person operating a public water system, the following notification must be given within 10 days [Health and Safety Code Section 116450(g)]:

  • SCHOOLS: Must notify school employees, students, and parents (if the students are minors).
  • RESIDENTIAL RENTAL PROPERTY OWNERS OR MANAGERS (including nursing homes and care facilities): Must notify tenants.
  • BUSINESS PROPERTY OWNERS, MANAGERS, OR OPERATORS: Must notify employees of businesses located on the property.

This notice is being sent to you by the Grizzly Lake CSD.

State Water System ID#: 3200104

Published PR

March 7, 2018|