(a) Water quality analysis. Water samples must be collected near the end of the aquifer test for chemical analysis. Samples must be collected from each aquifer being considered for water supply for the proposed subdivision and reported on or attached to the Certification of Groundwater Availability Form (TCEQ-20982).(1) For proposed subdivisions where the anticipated method of water delivery is from an expansion of an existing public water supply system or a new public water supply system, the samples must be submitted for bacterial and chemical analysis as required by Chapter 290, Subchapter F of this title (relating to Drinking Water Standards Governing Drinking Water Quality and Reporting Requirements For Public Water Systems).(2) For proposed subdivisions where the anticipated method of water delivery is from individual water supply wells on individual lots, samples must be analyzed for the following:(A) chloride;(B) conductivity;(C) fluoride;(D) iron;(E) nitrate (as nitrogen);(F) manganese;(G) pH;(H) sulfate;(I) total hardness;(J) total dissolved solids; and(K) presence/absence of total coliform bacteria.(3) Conductivity and pH values may be measured in the field, and the other constituents must be analyzed in a laboratory accredited by the agency according to Chapter 25, Subchapters A and B of this title (relating to General Provisions and Environmental Testing Laboratory Accreditation, respectively) or certified by the agency according to Chapter 25, Subchapters A and C of this title (relating to General Provisions and Environmental Testing Laboratory Certification, respectively).(b) Submission of information. The information, data, and calculations required by this section must be made available to the municipal or county authority, if requested, to document the requirements of this section as part of the plat application.