Full Breakdown
Temporary Boost of Lake Lugano Outflow Aims to Relieve Italian Rice-Growing Regions
8/12/2026, 11:45:29 AM
Increased Outflow from Lake Lugano
The Italian-Swiss consultative body that regulates Lake Maggiore’s water level has ordered the outflow at the Ponte Tresa bottleneck to rise from three to eight cubic metres per second. The change will be in force for ten days, beginning immediately, and is expected to lower Lake Lugano’s level by roughly ten centimetres. The Ticino Waterways Office announced that the measure will be closely monitored and reassessed after the period ends.
Background: Drought Pressures on Lake Maggiore and Ticino Reservoirs
Lake Maggiore’s water level is described as “extremely low,” only a few centimetres above a new record low, prompting concerns for downstream rice fields in Italy’s Novara, Lomellina and Milan provinces. Simultaneously, the Ticino canton reports that its hydroelectric reservoirs are at the lowest levels recorded in the past ten years, a situation compounded by a broader Swiss drought alert. The Ticino cantonal government had informed the Piedmont region on July 17 that the Swiss side was also under a drought warning due to insufficient rainfall.
Details of the Temporary Measure
The emergency decision followed a meeting convened on Monday at the request of Italy’s Ministry of the Environment. By increasing the discharge, additional water will flow into Lake Maggiore and subsequently into the Italian rice-growing areas that rely on the lake’s outflow. The Ticino Waterways Office emphasized that the increased release will be limited to the ten-day window, after which water-level developments and regional needs will be re-evaluated.
Official Responses and Legal Constraints
The Piedmontese government formally asked Ticino for a higher water release, citing agricultural needs. However, Ticino officials noted that further releases from hydroelectric reservoirs are not feasible because a large share of the water is subject to private concessions beyond cantonal control, and any additional drawdown could jeopardise electricity supply reliability. Consequently, the canton’s capacity to act remains legally restricted.
Anticipated Impact and Next Steps
If the ten-day outflow succeeds in raising Lake Maggiore’s level, it could alleviate immediate stress on the Italian rice sector and reduce the risk of record-low water conditions. After the ten-day period, authorities will reassess water levels and regional demands before deciding on any further adjustments.
