This Administrative Order is issued to the National Park Service for violations at the Teton Science School Public Water System. These violations consist of failure to maintain at least 0.2 mg/L residual disinfection concentration for more than 4 hours in the water entering the distribution system; failure to meet the turbidity level in at least 95% of the monthly measurements; failure to monitor for turbidity; failure to report noncompliance with residual disinfectant requirements to EPA; and failure to report NPDW violations to EPA.