Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XII - Water Supplies
Chapter 1 - General
Subchapter D - Treatment
Section XII-191 - Taste and Odor Control

Universal Citation: LA Admin Code XII-191

Current through Register Vol. 50, No. 9, September 20, 2024

A. Powdered Activated Carbon. Design elements for powdered activated carbon (PAC) include the following.

1. Continuous agitation or resuspension equipment shall be provided to keep the carbon from depositing in the slurry storage tank.

2. Provision shall be made for adequate dust control.

3. The required rate of feed of carbon in a water treatment plant depends upon the tastes and/or odors involved, but provision should be made for adding from 0.1 milligrams per liter to at least 40 milligrams per liter.

4. Powdered activated carbon shall be handled as a potentially combustible material.

B. Granular Activated Carbon. Replacement of anthracite with granular activated carbon (GAC) may be considered as a control measure for geosmin and methyl isoborneol (MIB) taste and odors from algae blooms. Demonstration studies may be required by the state health officer. See §177. A.6 iv of this Part for application within filters.

C. Copper Sulfate and Other Copper Compounds. Continuous or periodic treatment of water with copper compounds to kill algae or other growths shall be controlled to prevent copper in excess of 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.

D. For aeration, see §185 of this Part.

E. Ozone. Ozonation can be used as a means of taste and odor control. Adequate contact time shall be provided to complete the chemical reactions involved. Ozone is generally more desirable for treating water with high threshold odors. (See §179. H of this Part)

AUTHORITY NOTE: Promulgated in accordance with the provisions of R.S. 40:4.A.(8), 40:4.13.D.(1)(2) and 40:5.A.(2)(3)(5)(6)(7)(17).

Disclaimer: These regulations may not be the most recent version. Louisiana 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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