Chapter 6. Safe Drinking Water Regulations

§ 6141.3. Coverage. The provisions of 40 Code of Federal Regulations § 141.3, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.30. [Reserved]. Appendix A to Subpart C of Part 141 – Alternative Testing Methods Approved for Analyses Under the Safe Drinking Water Act

§ 6141.31. Reporting Requirements. The provisions of 40 Code of Federal Regulations § 141.31, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.32. [Reserved].

§ 6141.33. Record Maintenance. The provisions of 40 Code of Federal Regulations §141.33, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 9

§ 6141.34. [Reserved].

§ 6141.35. Reporting and Public Notification for Certain Unregulated Contaminant Monitoring Results. The provisions of 40 Code of Federal Regulations §141.35, as revised and codified as of July 1, 2019, are hereby adopted by reference. S UBPART E S PECIAL R EGULATIONS , I NCLUDIN…

§ 6141.36 - § 6141.39. [Reserved].

§ 6141.4. [Reserved].

§ 6141.40. Monitoring Requirements for Unregulated Contaminants. The provisions of 40 Code of Federal Regulations § 141.40, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.400. General Requirements and Applicability. The provisions of 40 Code of Federal Regulations § 141.400, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.401. Sanitary Surveys for Ground Water Systems. The provisions of 40 Code of Federal Regulations § 141.401, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.402. Ground Water Source Microbial Monitoring and Analytical Methods. The provisions of 40 Code of Federal Regulations § 141.402, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.403. Treatment Technique Requirements for Ground Water Systems. The provisions of 40 Code of Federal Regulations § 141.403, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.404. Treatment Technique Violations for Ground Water Systems. The provisions of 40 Code of Federal Regulations § 141.404, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 32

§ 6141.405. Reporting and Recordkeeping for Ground Water Systems. The provisions of 40 Code of Federal Regulations § 141.405, as revised and codified as of July 1, 2019, are hereby adopted by reference. S UBPART T E NHANCED F ILTRATION AND D ISINFECTION – S YSTEMS S ERVING F EWER…

§ 6141.406 - § 6141.499. [Reserved].

§ 6141.41. Special Monitoring for Sodium. The provisions of 40 Code of Federal Regulations § 141.41, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 10

§ 6141.42. Special Monitoring for Corrosivity Characteristics. The provisions of 40 Code of Federal Regulations § 141.42, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.43. Prohibition on Use of Lead Pipes, Solder, and flux. (a) [Reserved]. (b) Definitions. (1) Endpoint devices means plumbing fittings and fixtures intended to dispense water from the domestic water piping system for human ingestion. These devices include but are not limite…

§ 6141.44 - § 6141.49. [Reserved].

§ 6141.5. Siting Requirements and Plan Review. (a) Before a person may enter into a financial commitment for or initiate construction of a new public water system or increase the capacity of an existing public water system, he shall notify Guam EPA and, to the extent practicable,…

§ 6141.50. Maximum Contaminant Level Goals for Organic Contaminants. The provisions of 40 Code of Federal Regulations § 141.50, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.500. General Requirements The provisions of 40 Code of Federal Regulations § 141.500, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.501. Who is subject to the requirements of subpart T? The provisions of 40 Code of Federal Regulations § 141.501, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 35

§ 6141.502. When must my system comply with these requirements? The provisions of 40 Code of Federal Regulations § 141.502, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.503. What does subpart T require? The provisions of 40 Code of Federal Regulations § 141.503, as revised and codified as of July 1, 2019, are hereby adopted by reference. ADDENDUM 1 FINISH WATER RESERVOIRS

§ 6141.504 - § 6141.509. [Reserved]. ADDENDUM 1 FINISH WATER RESERVOIRS

§ 6141.51. Maximum Contaminant Level Goals for Inorganic Contaminants. The provisions of 40 Code of Federal Regulations § 141.51, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 16

§ 6141.510. Is my system subject to the new finished water reservoir requirements? The provisions of 40 Code of Federal Regulations § 141.510, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.511. What is required of new finished water reservoirs? The provisions of 40 Code of Federal Regulations § 141.511, as revised and codified as of July 1, 2019, are hereby adopted by reference. ADDENDUM 2 ADDITIONAL WATERSHED CONTROL REQUIREMENTS FOR UNFILTERED SYSTEMS

§ 6141.512 - § 6141.519. [Reserved]. ADDENDUM 2 ADDITIONAL WATERSHED CONTROL REQUIREMENTS FOR UNFILTERED SYSTEMS

§ 6141.52. Maximum Contaminant Level Goals for Microbiological Contaminants. The provisions of 40 Code of Federal Regulations § 141.52, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.520. Is my system subject to the updated watershed control requirements? The provisions of 40 Code of Federal Regulations § 141.520, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATION…

§ 6141.521. What updated watershed control requirements must my unfiltered system implement to continue to avoid filtration? The provisions of 40 Code of Federal Regulations § 141.521, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.522. How does the State determine whether my system ’ s watershed control requirements are adequate? The provisions of 40 Code of Federal Regulations § 141.522, as revised and codified as of July 1, 2019, are hereby adopted by reference. ADDENDUM 3 DISINFECTION PROFILE

§ 6141.523 - § 6141.529. [Reserved]. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATIONS 33 ADDENDUM 3 DISINFECTION PROFILE

§ 6141.53. Maximum Contaminant Level Goals for Disinfection Byproducts. The provisions of 40 Code of Federal Regulations § 141.53, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.530. What is a disinfection profile and who must develop one? The provisions of 40 Code of Federal Regulations § 141.530, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.531. What criteria must a state use to determine that a profile is unnecessary? The provisions of 40 Code of Federal Regulations § 141.531, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.532. How does my system develop a disinfection profile and when must it begin? The provisions of 40 Code of Federal Regulations § 141.532, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.533. What data must my system collect to calculate a disinfection profile? The provisions of 40 Code of Federal Regulations § 141.533, as revised and codified as of July 1, 2019, are hereby adopted by reference. D IV . 2 W ATER C ONTROL C H . 6 - D RINKING W ATER R EGULATI…

§ 6141.534. How does my system use this data to calculate an inactivation ratio? The provisions of 40 Code of Federal Regulations § 141.534, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.535. What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection? The provisions of 40 Code of Federal Regulations § 141.535, as revised and codified as of July 1, 2019, are hereby adopted by reference.

§ 6141.536. My system has developed an inactivation ratio; what must we do now? The provisions of 40 Code of Federal Regulations § 141.536, as revised and codified as of July 1, 2019, are hereby adopted by reference. ADDENDUM 4 DISINFECTION BENCHMARK

§ 6141.537 - § 6141.539. [Reserved]. ADDENDUM 4 DISINFECTION BENCHMARK

§ 6141.54. Maximum Residual Disinfectant Level Goals for Disinfectants. The provisions of 40 Code of Federal Regulations § 141.54, as revised and codified as of July 1, 2019, are hereby adopted by reference.