Complex sentence: As of 2006, only 14% of the wastewater from these plants was being reused, because farmers in the Jordan Valley are reluctant to use the poor quality reclaimed water for irrigation.
Split into simpler sentences: As of 2006, only 14% of the wastewater from these plants was being reused. An explanation for this is that farmers in the Jordan Valley are reluctant to use the reclaimed water, which they perceive to be of poor quality, for irrigation.