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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Method Comparison: Analysis of Fecal Coliform Samples from Washington State Estuaries |
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Method Comparison: Analysis of Fecal Coliform Samples from Washington State Estuaries (Number of pages: 31) (Publication Size: 925KB)
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| Author(s) | Mathieu, N. | ||||
| Description | During 2012-2013, the Department of Ecology conducted an analytical comparison study of two methods used to determine fecal coliform bacteria concentrations in water samples. The purpose of the study was to determine whether a relatively new chromogenic substrate method, Colilert®-18 (CS-C18), could be used for estuarine water samples in place of the well-established multiple tube fermentation (MTF) method with an A1 growth medium (MTF-A1). For samples with relatively low bacteria levels, results showed that the experimental CS-C18 method indicated bacteria concentrations significantly lower than the conventional MTF-A1 method. Recommendations from this study include: (1) continue using established MTF methods in Washington State, (2) conduct future studies to investigate the cause of the method discrepancy, and (3) collect additional comparison samples at a higher concentration range. |
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The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
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| Contact | Nuri Mathieu at 360-407-7359 or nmat461@ecy.wa.gov | ||||
| Keywords | Colilert, MPN, estuaries, shellfish, fecal coliform | ||||
| WATERSHED | Water Resource Inventory Areas (WRIA 01,WRIA 14,WRIA 18,WRIA 24) |
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| DATA | Environmental Information Management (EIM) #NMat0005 |
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| RELATED PUBLICATIONS | Title:
Quality Assurance Project Plan: Fecal Coliform Method Comparison Study in Estuarine Waters of Washington State |
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