Nondegradation Determinations & Mixing Zones - Application Forms, Checklists, Examples

Application for Significance Determination
Significance Determination Checklist (for Department use)
Surface Water Mixing Zone Determination Checklist
Ground Water Mixing Zone Determination Checklist
Example of the Statement of Basis (SOB) for a Montana Ground Water Pollution Control System (MGWPCS) permit. (The SOB includes a discussion of how the permit complies with nondegradation requirements.)
Example of the Statement of Basis (SOB) for a Montana Pollutant Discharge Elimination System (MPDES) Permit. (The SOB includes a discussion of how the permit complies with nondegradation requirements.
Example of a nondegradation review


Nondegradation Determinations & Mixing Zones
Staff Contact: Eric Regensburger (406) 444-6714

Montana Statutes & Rules

How to Perform a Nondeg Analysis

Summary of Requirements for ARM 17.30.716 (Subdivision exemptions)

Federal Statutes & Rules

Application Forms, Checklists, Examples

Circular WQB-7, Montana Numeric Water Quality Standards Nutrient Reducing Waste -water Systems (Level 2)
List of Systems
Scoring Sheet
AdvanTex Approval
Eliminite Approval
International Wastewater Systems Approval
Santec Approval
Bio-Microbics Approval
HDR Engineering Activated Sludge/BNR Approval
HDR Engineering Activated Sludge/BNR Membrane Filtration Approval (2)
International Wastewater Systems Approval (2)
Norweco Approval
Fluidyne ISAM Approval
Quanics Approval
SepticNET Approval
Jet Approval
AdvanTex AXRT Approval
Northwest Water Systems 2400 Approval
Northwest Water systems 7500 Approval
SeptiTech Approval