1. (a) The following secondary constituent levels are limits, applicable to all public water systems. No drinking water supply which does not meet the Secondary Constituent Levels may be used without written approval from the commission.
2. (b) For all instances in which drinking water does not meet the recommended limits and is accepted for use by the commission, such acceptance is valid only until such time as water of acceptable chemical quality can be made available at reasonable cost to the area(s) in question.
3. (c) Community water systems that exceed the secondary maximum constituent level for fluoride but are below the level listed in §290.103 of this title (relating to Standards of Chemical Quality) must notify the public. The notice must be made annually by including it with the water bill or by separate mailing to all customers. The form and content of the notice shall be as prescribed by the commission.

Source Note:The provisions of this §290.113 adopted to be effective April 15, 1994, 19 TexReg 2282; amended to be effective December 7, 1994, 19 TexReg 9368.