Wyoming Legislature Funds Study on Cost-Effectiveness of Cloud Seeding Programs

The Joint Agriculture, State and Public Lands & Water Resources meeting held on August 28, 2025, focused on cloud seeding and its environmental implications, as well as the economic viability of such programs in Wyoming. The discussions were led by various representatives and experts who provided insights into the effectiveness and costs associated with cloud seeding initiatives.

The meeting began with a review of the environmental impact of cloud seeding, particularly concerning the use of paradichlorobenzene. Concerns were raised about the cumulative effects of cloud seeding over extended periods. One representative expressed skepticism about the potential environmental changes, arguing that the amounts of silver dispersed through cloud seeding are minimal compared to existing natural levels in soil and water. This perspective emphasized that even over a century, the impact would be negligible.

Following this, the conversation shifted to the economic aspects of cloud seeding. A representative inquired about the cost per acre-foot of water produced through cloud seeding efforts. The director reported that recent studies indicated a cost of approximately $59.95 per acre-foot for precipitation seeding in the Medicine Bow-Sierra Madre region, with a range of costs from $56 to $124. This data was derived from a comprehensive study funded by the Wyoming legislature, which aimed to assess the financial viability of cloud seeding programs.

The discussion highlighted the transition from questioning the effectiveness of cloud seeding to evaluating its cost-effectiveness. The director noted that previous studies had established the efficacy of cloud seeding, leading to a focus on whether the investment was justified. The legislature's funding of a $300,000 hydrologic assessment was a significant step in this evaluation process, aiming to provide a clearer understanding of the benefits relative to the costs involved.

In conclusion, the meeting underscored the ongoing debate surrounding cloud seeding in Wyoming, balancing environmental concerns with economic considerations. The findings from recent studies are expected to inform future decisions regarding the continuation and expansion of cloud seeding initiatives in the state. Further discussions and evaluations will likely follow as stakeholders seek to determine the best path forward for water resource management in Wyoming.