40 CFR 141.28 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 136.1 To § 149.111) — Environmental Protection Agency (Continued) (§ 136.1 To § 149.111) — Water Programs (Continued) (§ 136.1 To § 149.111) — National Primary Drinking Water Regulations (§ 141.1 To § 141.861) — Monitoring And Analytical Requirements (§ 141.21 To Appendix A To Subpart C Of Part 141) — Certified laboratories.

(a) For the purpose of determining compliance with § 141.21 through 141.27, 141.30, 141.40, 141.74, 141.89 and 141.402, samples may be considered only if they have been analyzed by a laboratory certified by the State except that measurements of alkalinity, calcium, conductivity, disinfectant residual, orthophosphate, pH, silica, temperature and turbidity may be performed by any person acceptable to the State.

(b) Nothing in this part shall be construed to preclude the State or any duly designated representative of the State from taking samples or from using the results from such samples to determine compliance by a supplier of water with the applicable requirements of this part.