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Surface Water Discharge Permitting (NPDES)
Sustainable Water Resources

Nonpoint Source Pollution

Total Maximum Daily Loads (TMDLs)

About Surface Water Permitting

MassDEP's responsibilities under the National Pollutant Discharge Elimination System (NPDES).
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Frequently Asked Questions

How to obtain various classes of NPDES permits.
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Industrial Wastewater

MassDEP's Industrial Wastewater Management Program.
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Surface Water (NPDES) Guidance and Policies

infiltration and Inflow management and more.
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Surface Water (NPDES) Regulations

314 CMR 2.00, Permit Procedures; 314 CMR 4.00, Surface Water Quality Standards; 314 CMR 9.00, 401 Water Quality Certification (Dredging); and 310 CMR 30.00, Hazardous Waste Regulations relating to dredged material.
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Stormwater

Stormwater management and permitting in Massachusetts.
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