• AWWA WQTC60787
Provide PDF Format

Learn More

AWWA WQTC60787

  • Two-of-Five Odor Test: A Practical Method for Routine Sensory Analysis
  • Conference Proceeding by American Water Works Association, 11/15/2004
  • Publisher: AWWA

$12.00$24.00


This paper describes the procedure and application of the 2-of-5 Odor Test for use in routinewater quality monitoring. In the 2-of-5 Odor Test an analyst is asked to determine if the odors oftwo different water samples are the same or different. To perform the test, the analyst is requiredto sort five samples, based on their odor characteristics, into one group of two and another groupof three, even if the decision is a guess. If the samples are correctly sorted, the two waters areconsidered to be noticeably different in odor character and the analyst describes the reason for thedifference. In comparison to other odor tests in use, this test follows a more natural process forevaluating samples using human senses. This test was applied at the Songchon Water TreatmentPlant in Daejeon, Korea, to monitor an earthy/musty taste-and-odor event when the geosminconcentration varied from 0-50 ng/L. The 2-of-5 test is used by personnel at the PhiladelphiaWater Department to decide if drinking water is of acceptable sensory quality after installation orreplacement of new water mains, and to follow up on customer complaints of off -odors. Includes 17 references.

Related Products

AWWA SOURCES66408

AWWA SOURCES66408

Market Research Study: Barriers and Opportunities to Sustainable Landscaping Practices in the Reside..

$12.00 $24.00

AWWA 51488

AWWA 51488

Piloting New Work Practices in Utility Maintenance..

$12.00 $24.00

AWWA JTMGT57479

AWWA JTMGT57479

Fair Impact Fees for Large Non-Residential Users..

$12.00 $24.00

AWWA JAW3798

AWWA JAW3798

Journal AWWA - Evaluating the Effects of Earthquakes on Buried Pipelines ..

$15.00 $30.00