Frequent Questions

What are the different system Schedules and their population numbers?

Systems serving 100,000 or more users or a wholesale system connected to a system of that size are Schedule 1.  Systems serving 50,000-99,999 users or a wholesale system connected to a system of that size are Schedule 2; and systems serving 10,000-49,999 users or a wholesale system connected to a system of that size are Schedule 3.  Any system serving fewer than 10,000 users is on Schedule 4.

For additional guidance on the Long Term 2 Enhanced Surface Water Treatment Rule please visit http://water.epa.gov/lawsregs/rulesregs/sdwa/lt2/index.cfm.

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