Water distribution and storage system classifications

Water distribution and storage systems must be classified in one of five classes. Classifications must be based on population served, design population, type of distribution and storage system, and the volume of water to be handled. Systems may be classified at the discretion of the department by reason of the incorporation in the system of special design features or complex features or characteristics unusually difficult to operate, conditions of volume and flow, or a combination of such conditions and circumstances. 1. Class IA. All water distribution and storage systems serving a population of less than five hundred persons. 2. Class I. All water distribution and storage systems serving a population of five hundred to one thousand five hundred persons. 3. Class II. All water distribution and storage systems serving a population of one thousand five hundred to fifteen thousand persons. 4. Class III. All water distribution and storage systems serving a population of fifteen thousand to fifty thousand persons. 5. Class IV. All water distribution and storage systems serving a population of fifty thousand persons or more.