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WOODSTOCK, Ga. -- Residents of Woodstock may notice some discoloration in their water due to fire hydrantmaintenancethat began on May 30.

Themaintenancewill continue until July 31. The Woodstock Fire Department performsmaintenancetwice per year. During that time, officials paint, flow and grease the hydrants around the city.

According to Woodstock Fire, themaintenanceis performed as a "componentof the Insurance Service Office (ISO) rating."

Currently, Woodstock's ISO rating is a 3 --- 1 is the highest.

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