Brace yourself – water and wastewater service rates are officially going up. The average residential water bill will increase 21.8%. The average residential wastewater bill will increase 68%. Special conditions do apply. The City of Del Rio will implement these new rates for the 2026 fiscal year, providing an effective date of October 1, 2025. Such large percentages may sound alarming, but the average increase adds up to less than $25 additional cost per month.