RI Pollutant Discharge Elimination System
This is the backbone of the state's water pollution control strategy, which includes developing & enforcing permit limitations for municipal and industrial wastewaters, storm water, & combined sewer overflows
discharged directly to the waters of the state, as well as industrial wastewaters discharged to municipally-owned treatment facilities. The program currently oversees permit compliance for 29 major discharges, approximately 130 minor discharges, & approximately 250 storm water discharges. The Pretreatment Program provides ongoing oversight of fifteen approved local pretreatment programs. These programs regulate approximately 300 Significant Industrial Users, over half of which are subject to Federal Categorical Pretreatment Standards.
Related Links
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RIPDES Storm Water Program
Fee Assessment Document for User Fee System for Point Source Discharges
RIPDES Public Notices

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RIPDES Regulations
DMR Instructions
RIPDES Individual Permit General Requirements
RIPDES Application Forms
Fee Form for New Dischargers
Fee Regulations
NEW Electronic Document Submission Rules (Eff. 1/10.12)
General Permits
Storm Water - Multi-Sector
FINAL MSGP NOI Application
Watershed Map
Notice of Termination
Storm Water - Construction Activity (and NOI and NOT)
Watershed Map
RI Model SWPPP
Construction Site Stormwater Compliance Program
Non-Contact Cooling Water
Remediation General Permit
RIPDES Pesticide General Permit and Fact Sheet, 5/22/12
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