Israel Restarts Desalination Plants as Sea of Galilee Supplies Water Amid Drought

Jerusalem, Israel – September 8, 2026

Israel's water network is back on track after a sudden crisis forced the country's largest desalination plants to halt production for almost two weeks. The shutdown, triggered by an algal bloom that crippled intake screens, pushed authorities to draw heavily from the Sea of Galilee (Kinneret) and deep aquifers to meet the needs of households, farms, and industry.

"The Sea of Galilee has been a lifeline for the nation for centuries. In the past ten days it supplied roughly 870 million gallons of water to the national grid, a volume that would otherwise have come from desalination," said Dr Yossi Levi, director of Israel's National Water Authority, at a briefing in Kinneret. "We are now operating all six desalination plants at full capacity, but the episode underscores the fragility of our water system under climate stress."

Context and Significance

The algal bloom, first detected on August 27, spread across the southern Mediterranean coast and entered the intake tunnels of the Ashdod, Hadera, and Sorek plants. The bloom's toxins caused rapid fouling of membranes, prompting operators to shut down the plants to avoid damage. Simultaneously, a persistent heatwave pushed reservoir levels across the country to historic lows.

The Sea of Galilee, Israel's largest freshwater lake, fell by 4 inches (10 cm) in ten days, reaching its lowest level since 2018. The lake's historic role as a backup water source was re-activated, with emergency pumps delivering water to the national grid at a rate of 1.3 million m3 per day.

Scale of the Response

• Desalination capacity: Six plants, together capable of producing 2 million m3/day, were offline for 12 days. By September 8, all were back online, with the Hadera plant operating at 100% and the others at 90-95%.
• Lake pumping: Pumping from the Sea of Galilee averaged 1.3 million m3/day, supplying roughly 15% of Israel's total daily water demand.
• Aquifer draw: Deep wells in the Jordan Valley increased output by 20% to compensate for reduced surface-water supplies.

"Our aquifers are under unprecedented pressure," noted Prof Miriam Grossman, hydrogeologist at the Hebrew University. "If such events become annual, we will need to rethink the balance between desalination, surface water, and groundwater use."

Implications for Agriculture

Israel's agricultural sector, which relies on both desalinated water and lake-derived supplies for irrigation, faced a 7% reduction in water allocation during the crisis. Crops most affected were high-value vegetables grown in the Jordan Valley, where irrigation schedules had to be trimmed by an average of three days per month.

The Ministry of Agriculture announced a temporary subsidy for affected growers, covering 30% of the additional energy costs incurred by deeper well pumping. Officials also pledged to accelerate the rollout of drip-irrigation upgrades, a technology that can cut water use by up to 40% without sacrificing yields.

Broader Lessons

The event highlights three key challenges for water-scarce nations:

1. Climate-induced shocks – Heatwaves and algal blooms are becoming more frequent, threatening both surface-water reservoirs and desalination intake systems.
2. System redundancy – Maintaining multiple supply pathways (desalination, reservoirs, aquifers) proved essential to averting a severe water shortage.
3. Infrastructure resilience – Upgrading intake screens and installing real-time bloom detection could reduce future shutdowns.

"We must view this as a warning sign rather than an isolated incident," said Dr Levi. "Investments in climate-smart water infrastructure will determine whether we can sustain both urban life and agricultural productivity in the coming decades."

Sources:

• Israel Water Authority, "Emergency Pumping from the Sea of Galilee – September 2026 Report," September 8, 2026.
• Reuters, "Israel desalination plants restart after crisis forces Sea of Galilee pumping," September 8, 2026.
• Jerusalem Post, September 8, 2026.