This research aims to provide an overview and determine the basic service infrastructure index in Serang Regency.  The indicators used are access to housing and settlements, ground water and raw water, access to safe and secure drinking water and sanitation, safety and health, infrastructure protection from natural disasters and security. The research implementation time was two months. The data used is secondary data originating from performance reports of ministries, regional apparatus and BPS. The analysis technique used is basic service infrastructure index calculation. The research results show that there are still 30% of Serang Regency residents who do not have access to adequate housing; there are 30.31% who have access to clean drinking water; As many as 80.34% have access to proper sanitation; There are 71.47% who have access to hand washing facilities with soap. , 97.17% have stable national road conditions, and 24.54% of all villages have disaster-resistant communities. Second, the results of the Basic Services Infrastructure Index from 2019 to 2021 have increased (2019: 55.09; 2020: 56.08; and 2021: 58.92). This shows that the condition of basic service infrastructure managed by the Serang Regency Government is getting better.
                        
                        
                        
                        
                            
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