San Marcos Mercury | Local News from San Marcos and Hays County, Texas
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February 26th, 2010
San Marcos well tests positive for E. coli


A city of San Marcos well tested positive for E. coli during a recent water sample. Notification of the test results were received on Thursday, Feb. 25.

The sample was taken from raw untreated water from one of the City’s wells which supplies only 1.5% of the total system supply.

The well was immediately discontinued from active service. Water personnel are working diligently to restore water quality to this well. All raw water is disinfected prior to distribution as potable water. No E. coli bacteria have been detected in the distribution system samples.

“This is a required regulatory notice under the Ground Water Treatment Rule. Bacteria are commonly present in the environment and raw water supply sources,” said Tom Taggart, Director of Public Services. “This is why raw water is treated to drinking water standards to ensure public health.”

The following actions are being taken by the City:

· The well that tested positive has been discontinued from active service.

· Water employees have begun flushing the well in order to provide fresh water to the well.

· Limited disinfection of the well may be utilized if flushing is unsuccessful.

· Further bacterial samples will be collected to confirm the results.

The city is working closely with the Texas Commission on Environmental Quality to insure all regulatory requirements are adhered to and public health is protected at all times. The city will update media outlets as necessary until the situation is fully addressed.

Residents may call the Public Services Department at 393-8010 for more information.

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