Notices

TASTE AND ODOR NOTICE

Tarrant County Water Supply Project – Project Manager, 817-267-4226
December 2020

The Trinity River Authority of Texas Tarrant County Water Supply Project customers in the cities of Bedford, Colleyville, Euless, Grapevine and North Richland Hills may be detecting an earthy or musty taste in their tap water. Though this may be unpleasant, TRA assures its customers that their tap water is safe to drink.

 The current taste and odor are being caused by the compound geosmin (compound coming from algae) in TRA’s raw water supply, Lake Arlington. Geosmin does not affect the safety of the finished tap water and is not a public health threat.

TREATMENT FOR TASTE AND ODOR

Currently, the primary treatment process for taste and odor at the Tarrant County Water Supply Project is ozonation. During events producing high concentrations of taste and odor form compounds such as geosmin, the treatment is aided with the addition of hydrogen peroxide after primary disinfection is achieved.

PROJECTED RAW WATER CONDITIONS AND ITS EFFECTS ON TASTE AND ODOR

Lake Arlington’s water temperature plays a key role in favoring algae populations that produce geosmin. From past observations, geosmin concentrations are highest after the lake temperature is below 10ºC. 

TRA will continue to make modifications to the ozone and peroxide feeds at TCWSP to improve geosmin removal performance. 

TRA recognizes that taste and odor concerns are elevated because even in low concentrations, the taste and odor produced by geosmin is readily noticed. 

The Trinity River Authority recognizes that taste and odor has become a significant problem.  We are closely monitoring the raw and finished water for geosmin and are applying all appropriate resources toward improving the quality of the water delivered to our customer cities.

For further information on this process, please contact the Office of Public Works at 817-952-2200.