Hydrant Flushing begins April 22, 2018 The City of Havre de Grace will flush fire hydrants throughout its distribution system from Sunday, April 22, 2018 and will continue thereafter for approximately 45 days. Water users may experience reduced water pressure and/or discoloration. While the water supply will remain safe to drink, should you notice discoloration, let the cold water run clear. The washing of clothing is discouraged until discoloration disappears. You may contact the City of Havre de Grace Water Treatment Plant 24 hours per day, 7 days per week at 410-939-1070 with any questions or concerns.