Notice of fire hydrant flushing beginning October 20 Havre de GraceNotice of fire hydrant flushing beginning October 20 The City of Havre de Grace will flush fire hydrants throughout its distribution system beginning Sunday, October 20, 2019, and will continue thereafter for approximately 45 days. We do this 2x a year. Water users may experience a brief reduction in water pressure and/or discoloration when the hydrants in your area are being flushed. 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.