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8/6/2019 Plano Coliform News Release
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Phil Dyer Mayor
Pat Miner Mayor Pro Tem
Lissa Smith Deputy Mayor Pro Tem
Ben Harris Place 2
André Davidson Place 3
Jim Duggan Place 5
Jean Callison Place 7
Lee Dunlap Place 8
Bruce D. Glasscock City Manager
P.O. Box 860358Plano, Texas 75086-0358
972-941-7000www.plano.gov
For Immediate Release Contact
June 9, 2011 Gerald P. CosgroveDirector of Public Works(972) 941-7152
MCL Coliform Violation (TCR 22)
The City of Plano water system, PWS ID # 0430007, collected 23 water samplesduring April, 2011 that contained coliform bacteria. This water system is required tosubmit a minimum of 150 routine water samples each month for bacteriologicaanalysis. Twenty routine samples were coliform-found and three repeat sampleswere coliform-found for the month and year indicated above.
The Texas Commission on Environmental Quality (TCEQ) sets drinking waterstandards in Texas and has determined that the presence of total coliform is apossible health concern. Coliforms are bacteria that are naturally present in theenvironment and are used as an indicator that other potentially-harmful bacteria maybe present. Coliforms were found in more samples than allowed and this was awarning of potential problems.
For water systems analyzing at least 40 samples per month, no more than five (5)percent of the monthly samples may be positive for total coliform. For systemsanalyzing fewer than 40 samples per month, no more than one (1) sample per monthmay be positive for total coliform.
The City of Plano Public Works Department tests 150 water samples per monthThese are obtained from all areas of the city to insure the public drinking watesupply is safe for consumption and are sent for final testing to a laboratory at theNorth Texas Municipal Water District, who treats and supplies our municipal water.
In an unusual occurrence in mid to late April, 23 test results, out of 217 samplesreturned with higher than acceptable results for total coliform bacteria, an indicator ofpossible contamination. No pathogenic organisms (those which cause illness) andno indicators of fecal contamination, such as E.coli or fecal coliform, have beendetected. The samples had shown average chlorine residuals would protect thewater system from minor contaminations.
Since May 1, all water samples have tested “good,” with no presence of totacoliform bacteria. For quality assurance, a private lab and environmental consultanthave been employed to review this issue. As a result, the City of Plano is doingadditional testing to find the reasons for the testing results.
If you have questions regarding this matter, you may contact Gerald P. Cosgrove
Director of Public Works at 972-941-7152 or at [email protected].
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