<![CDATA[Conventional emergency reporting at the Kediri Regency Fire Department suffers from three structural problems: location inaccuracy, the absence of self-tracking for the public, and unstructured documentation. Similar studies typically address these issues separately, without integrating automatic geolocation, multi-channel notification, role-based access control (RBAC), and security validation into one empirically tested system. This study develops a web-based Emergency Response Information System (SIRTADA) using the Waterfall method, with a three-tier architecture combining automatic geolocation, Firebase Cloud Messaging, and a WhatsApp Gateway as parallel notification channels. Multi-level evaluation shows solid results: 100% unit test pass rate (63 test cases), 97.5% integration test pass rate (78/80 assertions), and an 89.3% UAT score ("Very Good"), although a Stored XSS vulnerability requiring further mitigation was identified. The novelty of this study lies in integrating automatic geolocation, multi-channel notification, and RBAC into a single empirically validated web-based emergency response architecture, offering an evaluation framework adoptable for similar public service systems]]>
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