Beyond thresholds: Risk envelopes for managing saline drinking water in climate-resilient ruminant systems

Freshwater scarcity and salinization are persistent constraints in dryland livestock systems, but static total dissolved solids (TDS) or electrical conductivity thresholds alone cannot account for water chemistry, animal class, exposure duration, diet, heat load, welfare, economics, or governance capacity. This perspective argues for chemistry-aware, species- and class-specific risk envelopes rather than one-size-fits-all thresholds. Recent evidence suggests that some adapted small ruminants can tolerate low-to-moderate salinity under supportive conditions, while productivity, reproduction, mineral balance, and welfare often decline before survival is threatened, especially in vulnerable or high-producing classes. We propose a Saline Resilience Framework that integrates animal physiology, water chemistry, nutrition, infrastructure, monitoring, stop-rules, and accountable governance. The central policy challenge is preventing saline-water use from becoming maladaptation that shifts environmental, economic, labor, and welfare burdens onto producers with the fewest options.