민물
Fresh water becomes available again for use instead of seawater to top up reactor water levels. The fresh water is provided by two United States Navy barges holding a total of 2,280 metric tons of fresh water which were towed by the Japan Maritime Self-Defense Force from the United States Fleet Activities Yokosuka Naval Base to Fukushima. Radiation levels near the plant decline to a still relatively high 170 μSv/h.