R 325.10702 Evaluation of adequacy and condition of public water supplies; sanitary surveys.

Rule 702. (1) Under section 3 of the act, the department shall make sanitary surveys, onsite inspections, surveillance observations, or special purpose investigations for the purpose of evaluating the adequacy and condition of public water supplies at a frequency which may be determined by the department. (2) Based on the results of each sanitary survey, the department shall determine whether the existing monitoring frequency is adequate and what additional measures, if any, the supply shall take to improve drinking water quality. (3) Subpart H supplies shall undergo sanitary surveys at least once every 3 years for community water supplies and at least once every 5 years for noncommunity water supplies. The department may reduce the frequency to at least once every 5 years for community water supplies that have demonstrated outstanding performance. (4) Groundwater supplies subject to R 325.10612 shall undergo sanitary surveys at either of the following frequencies: (a) Community water supplies shall undergo a sanitary survey at least once every 3 years, except the department may reduce the frequency to once every 5 years if either of the following conditions exists: (i) The supply provides at least 4-log treatment of viruses (using inactivation, removal, or a department approved combination of 4-log inactivation and removal) before or at the first customer for all its groundwater sources. (ii) The supply has an outstanding performance record. (b) Noncommunity water supplies shall undergo a sanitary survey at least once every 5 years.