To learn more about your water utility's monitoring and detection of Crypto, visit the Information Collection Rule . The ICR is sponsored by the EPA to gather more information on Crypto in US drinking water. To learn more about water treatment for Crypto, visit the EPA's Interim Enhanced Surface Water Treatment page. Utilities that serve over 100,000 people are required to monitor for Crypto and other parasites. But because detection data can be unreliable, different utilities act in different ways.
Many utilities now have research programs for understanding Crypto detection data.
Some, such as the Milwaukee Water Works, call emergency meetings if even a single oocyst is found in the water. Others report to local health departments. Then a joint task force decides whether and how to communicate this to the public. Notices may also be issued when other trigger events occur. For example, there are notices if treatment filters are not working properly, or if storms have caused sewers to overflow.