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REGULATORY REVIEW <br />SEPTEMBER 2024 / DRAFT / CAROLLO <br />CITY OF PLEASANTON <br />WATER SYSTEM MANAGEMENT PLAN i <br />pw://Carollo/CA/Pleasanton/201264-000000/03 Reports and Studies/02 Deliverables/TM_Regulatory Review/TM_Regulatory Review <br />Contents <br />SECTION 1 INTRODUCTION 1 <br />SECTION 2 SYSTEM CHARACTERISTICS 1 <br />SECTION 3 CURRENT DRINKING WATER REGULATIONS 3 <br />3.1 National Primary and Secondary Drinking Water Regulations 3 <br />3.2 California Drinking Water Regulations 4 <br />3.3 Health Advisory and Notification Levels 5 <br />3.4 City Compliance with Current Regulations, Health Advisory and Notification Levels 5 <br />3.4.1 Lead and Copper Rule Revisions (LCRR) 5 <br />3.4.2 Groundwater Rule 7 <br />3.4.3 Stage 1 and 2 D/DBPR 8 <br />3.4.4 Per- and Polyfluoroalkyl Substances (PFAS) 9 <br />3.4.5 Consumer Confidence Reports 10 <br />SECTION 4 POTENTIAL FUTURE REGULATIONS 10 <br />4.1 Microbial / Disinfection Byproducts (M/DBP) Rule 13 <br />4.2 Arsenic Rule 14 <br />4.3 Hexavalent Chromium (Cr(VI)) 14 <br />4.4 Manganese 14 <br />4.5 Microplastics 14 <br />SECTION 5 CONCLUSIONS AND RECOMMENDATIONS 15 <br />SECTION 6 REFERENCES 16 <br />Appendices <br />APPENDIX A NATIONAL PRIMARY DRINKING WATER REGULATIONS <br />APPENDIX B STATE AND FEDERAL DRINKING WATER REGULATIONS <br />Tables <br />Table 1 City of Pleasanton Water Sources 1 <br />Table 2 Summary for Lead Copper Rule Revisions 6 <br />Table 3 Summary of TTHM and HAA5 Concentrations 9 <br />Table 4 PFAS Federal and State Health Advisory Levels (USEPA, 2022; CA SWRCB, <br />2023). 9 <br />Table 7 Contaminant Candidate List History 11 <br />Table 8 Unregulated Contaminant Monitoring Rule History 12 <br />Table 9 List of Recent and Anticipated Near-Term Regulatory Actions 12 <br />Page 456 of 658