HYDRANT TESTING HAS STARTED. The City of Erlanger receives inquiries during the spring about the hydrant flow test program and fire hydrant inspection stirring up water line sediment. The hydrant program is conducted twice a year for the Insurance Services Office (ISO) requirements. The Insurance Service Office is an agency that rates fire departments and requires that fire hydrants be inspected f...or proper operation at least once a year. The flow rates of each hydrant are tested twice every year. Hydrant flow test records are checked regularly by the ISO to help determine our fire department’s class rating. These ratings are based on a 1 through 10 grading system, 1 being the best rating and 10 the least. The Erlanger Fire Department's fire rating is 2. By conducting programs such as the hydrant testing we can improve our rating, that in turn lowers insurance premium costs for commercial buildings and may also reduce residential rates as well. During the time of testing you may notice that your water is brown. If so turn on your lawn sprinklers or run water in the bath tub for about 5 minutes to help clear out your lines. In the event of doing laundry, do NOT dry your clothes if they appear to have rust stains on them. If this occurs re-wash your clothes.