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NPDES Wastewater Permitting

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Hot Topics

Siler City Wastewater Permit Modification

Permit Modification
Fact Sheet
Hearing Officer's Report
Addendum to Hearing Officer's Report

H.F. Lee Plant

Special Order by Consent
Public Notice
Draft SOC S18-006
SOC Upfront Penalty Calculation
H.F. Lee Engineering Evaluation

Belews Creek Steam Station

Special Order by Consent
Public Notice 12/20/18
Draft SOC S18-009
Belews Creek Engineering Evaluation
Belews Creek SOC Application
Belews Creek SOC Application Supplemental Information

NPDES Wastewater Permit
Public Notice 12/20/18
Draft WW Permit #NC0024406
Fact Sheet


Duke Energy Quarterly Monitoring Data: Quarterly monitoring data for Duke Energy facilities per the conditions set forth in the Special Orders by Consent (SOCs).

Current Duke Energy Wastewater Permit Renewals and Modifications

e-DMR: EPA’s Electronic Reporting Rule and how it may affect permit holders.

Precision in Discharge Monitoring Reports: Summarizes common conventions (and exceptions) for significant figures and rounding and describes their proper use in completing DMRs. Please direct questions to Mike Templeton at 919-807-6402 or

NPDES Permit Guidance

Engineering Alternatives Analysis
NC Model Mercury Minimization Plan
Reduction of Monitoring Frequencies for Exceptional Performance
Mixing Zones
Swamp Waters
Zero-Flow Streams
Trout Waters
Planning For An Expansion: A Guidance Document for Municipalities

Pollutant-Specific Permitting Guidance

Toxicity Testing
Fecal Coliform
Total Residual Chlorine
Total Residual Chlorine Compliance Level
Total Metals

NPDES Implementation of Instream Dissolved Metals Standards – Freshwater Standards

NPDES Implementation of Instream Dissolved Metals Standards – Saltwater Standards

Basin-Specific Permitting Guidance

Goose Creek
South Fork Catawba River Basin Color 

Facility Specific Permitting Guidance

Water Treatment Plant (WTP) Strategy
Assessment & Recommendations for WTP Permitting: Findings of the WTP Workgroup
Bulk Oil Terminals
Vehicle Pressure Washing  

NPDES Compliance Guidance

Significant Figures and Their Use on Discharge Monitoring Reports (DMRs)
DMR Calculations
NPDES Reporting Requirements
Wastewater Treatment Plant Annual Report Guidelines
Special Order by Consent (SOC) Guidance Document
Active Special Order by Consent (SOC) list
NPDES Standard Conditions 
Dissolved Metal to Total Metal Limit Calculators: Includes median HUC hardness values, user guide and calculators to assist permittees in understanding how the proposed Surface Water Standards (dissolved metals) impact permit limits.

Other Links

NPDES Compliance and Enforcement Information
Stormwater Permitting Program
DEQ Customer Service Center
PERCS Unit: Sewer collection system permits and pretreatment
Land Application Unit: Non-discharge permits such as wastewater disposal systems consisting of surface irrigation, high rate irrigation, recycle or reuse.