Overwatering with an irrigation system maintenance can have several negative consequences:

1. Root Rot: Excess water can suffocate plant roots, leading to root rot and other fungal diseases.
2. Nutrient Leaching: Overwatering can wash away essential nutrients from the root zone, depriving plants of necessary elements.
3. Weed Growth: Excess moisture encourages weed growth, competing with desired plants for resources.
4. Soil Compaction: Over time, waterlogged soil becomes compacted, reducing aeration and root penetration.
5. Pest Attraction: Standing water can attract pests like mosquitoes, potentially causing health issues.
6. Higher Water Bills: Overwatering unnecessarily increases water bills and energy costs.

To avoid overwatering:

1. Use Smart Controllers: Invest in controllers that adjust watering based on weather and soil moisture data.
2. Regular Inspection: Check your system for leaks, clogs, or malfunctioning components.
3. Soil Moisture Monitoring: Use soil moisture sensors to determine when and how much water is needed.
4. Proper Scheduling: Adjust irrigation schedules seasonally and consider plant type and local weather conditions.
5. Mulching: Apply mulch to retain soil moisture and reduce evaporation.
6. Consult Professionals: Seek advice from irrigation experts or landscape professionals for customized recommendations.