This upgrade to ICIS-NPDES, known as version 4.0, adds functionality for processing 22 new data families. Users of the ICIS-NPDES data flow can now submit all of their NPDES data families to EPA’s ICIS system the same way they have done in the past.
Prior ICIS-NPDES schema versions 2.1 and 3.2 of the schema will continue to be supported as well for existing State and Tribal submissions. Note that version 2.1 only supports the flow of DMRs, while version 3.2 only supports flows of basic permit, master general permit, general permit covered facility, unpermitted facility, permit tracking event, narrative condition/permit schedule, permitted feature, limit set, limit, and DMR data.
More information on the ICIS-NPDES data flow is available here.
U.S. Environmental Protection Agency
E: kittle.alison [at] epa.gov