Yes, rainwater harvesting systems can be used in conjunction with water-saving irrigation methods to further reduce water waste and promote sustainability. Rainwater harvesting systems collect and store rainwater for non-potable uses such as irrigation, toilet flushing, and washing machines. By using rainwater for irrigation, you can reduce your potable water consumption and reliance on municipal water supplies. Consider integrating rainwater harvesting systems with smart controllers and drip irrigation systems for maximum water efficiency.