Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.08 - IDAHO RULES FOR PUBLIC DRINKING WATER SYSTEMS
Section 58.01.08.533 - FACILITY AND DESIGN STANDARDS: DESIGN STANDARDS FOR TASTE AND ODOR CONTROL

Universal Citation: ID Admin Code 58.01.08.533

Current through August 31, 2023

Provision shall be made for the control of taste and odor. Chemicals shall be added sufficiently ahead of other treatment processes to assure adequate contact time for an effective and economical use of the chemicals. Where severe taste and odor problems are encountered, in-plant studies, pilot plant studies, or both in-plant and pilot plant studies may be required. See Subsection 501.19 for general information on conducting pilot studies. (3-24-22)

01. Chlorination. When using chlorination as a method of taste and odor control adequate contact time must be provided to complete the chemical reactions involved. (3-24-22)

02. Chlorine Dioxide. Provisions shall be made for proper storing and handling of the sodium chlorite, so as to eliminate any danger of explosion. (3-24-22)

03. Powdered Activated Carbon. (3-24-22)

a. The carbon can be added as a pre-mixed slurry or by means of a dry-feed machine as long as the carbon is properly wetted. (3-24-22)

b. Continuous agitation or resuspension equipment is necessary to keep the carbon from depositing in the slurry storage tank. (3-24-22)

c. Provision shall be made for adequate dust control. (3-24-22)

d. Powdered activated carbon shall be handled as a potentially combustible material. (3-24-22)

04. Granular Activated Carbon. Replacement of anthracite with GAC may be considered as a control measure for geosmin and methyl isoborneol (MIB) taste and odors from algae blooms in surface water applications. Demonstration studies are required by the Department. (3-24-22)

05. Copper Sulfate and Other Copper Compounds. Continuous or periodic treatment of surface water with copper compounds to kill algae or other growths shall be controlled to prevent copper in excess of one point zero (1.0) milligrams per liter as copper in the plant effluent or distribution system. Care shall be taken to assure an even distribution of the chemical within the treatment area. (3-24-22)

06. Potassium Permanganate. Application of potassium permanganate may be considered, providing the treatment shall be designed so that the products of the reaction are not visible in the finished water. (3-24-22)

07. Ozone. Ozonation may be used as a means of taste and odor control. Adequate contact time must be provided to complete the chemical reactions involved. (3-24-22)

08. Other Methods. Other methods of taste and odor control shall be made only after pilot plant tests and approval of the Department. (3-24-22)

Disclaimer: These regulations may not be the most recent version. Idaho may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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