Addressing the corporate water sustainability is crucial for both firms and stakeholders. Over the past decade, various analysis on Malaysian firms in agriculture and healthcare sectors have been conducted, focusing on their varying degrees of water sustainability, although studies on water disclosure are limited. This study explores corporate water sustainability by investigating the determinants of corporate water disclosure among publicly listed firms in Malaysia’s agriculture and healthcare sectors. Utilizing a quantitative research approach and regression analysis, the results indicate that ISO 14001-certified firms exhibit significantly higher levels of water disclosure. Firms that are Shariah‑compliant also disclosed more water-related information than non‑compliant firms, reinforcing the view that Shariah status supports ethical conduct and sustainability disclosure practices. The findings contribute to the corporate water sustainability literature by confirming that firms water disclosure practices are significantly affected by stakeholder pressure, as reflected in both ISO 14001 certification and Shariah-compliance status.  The empirical evidence demonstrating that externally imposed expectations - whether through environmental management standards or ethical governance requirements can influence corporate disclosure behaviour, which enhances the application of stakeholder theory in water-sensitive sectors. The analysis further reveals that agriculture firms disclose more water information than those in the healthcare sector, reflecting the higher water sensitivity and stakeholder scrutiny in agriculture sector. This echoed the stakeholder theory that firms with greater pressure will provide extensive disclosure regarding environmental sustainability practices. Beyond its theoretical contributions, this research offers practical implications for policymakers, regulators, and corporate governance bodies seeking to enhance the credibility of water disclosures, its comparability and usefulness of water related information, ensuring that corporate disclosures meet growing stakeholder demands for transparent and responsible water accounting. The study also enriches existing literature and provides new insights into how firms operationalise water sustainability within their reporting practices.

Keywords: Water Disclosure, Agriculture, Sustainability, Healthcare, Shariah Compliance