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Guidance

Agency guidance documents include written documents intended to guide agency actions affecting the rights or interested of people or groups outside the agency (Idaho Code §67-5250(2)).  

Other policy documents are intended to guide internal matters within the agency and are not posted online. 

A Memorandum of Understanding (MOU) is a legally nonbinding agreement between two or more parties that outlines terms and details of a mutual understanding or agreement, noting each party’s requirements and responsibilities. 

Program Type Document(s)
Surface Water Policy 401 Certification – ACOE 60 Day Deadline Policy Directive
Air Quality Guidance A Guide to Visible Emissions Evaluations
Drinking Water Guidance After the Flood: Protecting Your Drinking Water
Air Quality Guidance Air Quality in Idaho: Supplemental Fugitive Dust Control Information
Surface Water Memorandum Application of Water Quality Standards to Non-Perennial Waters
Air Quality Guidance AQ guidance modeling State of Idaho Guideline for Performing Air Quality Impact Analyses AQ-011 September-2013 0913
Wastewater MOU Between the Idaho State Department of Agriculture and IDEQ regarding regulations of composting facilities
Wastewater Guidance Biosolids Beneficial Use and Disposal Flowchart
Drinking Water Guidance Choosing an Environmental Consultant
Surface Water Guidance Concepts and Recommendations for Using the “Natural Conditions” Provisions of the Idaho Water Quality Standards
Surface Water Memorandum Continuous Temperature Monitoring Requirements in NPDES Permits
Air Quality Guidance Crop Residue Burning Operating Guide
Wastewater Memorandum Delegation of Authority for Issuing Waivers for the sections of the Idaho Rules for Public Drinking Water Systems, Wastewater Rules, and Recycled Water Rules
WM&R Policy DEQ Bunker Hill Land Transfer Policy 2020
WM&R Policy DEQ Policy Statement PS20-13 Supplemental Environmental Projects Policy
Surface Water Guidance DEQ Procedures for Decontamination of Monitoring Equipment
Wastewater Memorandum DEQ to Health Districts – Engineering Design Review for Subsurface Sewage Disposal Systems
Water Quality Policy Dispute Resolution Advisory Panel for Plan and Specification Engineering Disputes
Drinking Water Fact Sheet Drinking Water Cross-Connection Control Programs
Drinking Water Guidance Drinking Water Monitoring Waiver Guidance
Drinking Water Policy Drinking Water Penalty Policy
Drinking Water Guidance Drinking water, submersible pumps, and mercury seals: A potential problem
Air Quality Guidance Dust, Fugitive: Prevention and Control Plan
Air Quality Guidance Emissions Data Hierarchy Guidance
WM&R Manual Enforcement Procedures Manual
WM&R Letter EPA and DEQ RCRA MOA
WM&R MOA EPA and DEQ Resource Conservation and Recovery Act Memorandum Of Agreement
WM&R MOA EPA and DEQ Resource Conservation and Recovery Act MOA
Wastewater Guidance EPA Biosolids Guidance
IPDES Letter EPA Letter of Idaho Pollutant Discharge Elimination System Program Authorization and CROMERR Approval, E. Scott Pruitt, June 5, 2018
IPDES Letter EPA Letter to DEQ Finding Idaho Pollutant Discharge Elimination System Program Application Submission Complete, Dennis J. McLerran, September 3, 2016
Drinking Water Guidance Guidance for Actions to be Taken Following Drinking Water System Depressurization
Drinking Water Guidance Guidance for Determining Equalization Water Storage for Public Water Systems
Ground Water Guidance Guidance for Developing a Ground Water Quality Monitoring Program for Managed Recharge Projects by Land Application
Wastewater Guidance Guidance for Evaluating Wastewater Lagoon Seepage Rates
Drinking Water Guidance Guidance for Handling Waste Residuals Resulting from Drinking Water Treatment
Surface Water Guidance Guidance for Interpreting Antidegradation Policy for Unassessed, Ephemeral and Intermittent Streams
Surface Water Guidance Guidance for Interpreting Antidegradation Policy for Unassessed, Ephemeral and Intermittent Streams
Wastewater Guidance Guidance for Land Application of Municipal Biosolids
Drinking Water Guidance Guidance for New Source Water Testing Procedures for Public Drinking Water Systems
Drinking Water Guidance Guidance for Public Water System Disposal of Water from Construction, Maintenance, and Operations
Wastewater Guidance Guidance for Reclamation and Reuse of Municipal and Industrial Wastewater
Solid Waste Guidance Guidance for Siting, Design, and Operation of Nonhazardous Solid Waste Impoundments in Idaho
Solid Waste Guidance Guidance for Siting, Design, and Operations of Non-Municipal Solid Waste Landfills in Idaho
Wastewater Guidance Guidance for the Land Application of Domestic Septage WW
Air Quality Guidance Guidance for the Remediation of Petroleum-Contaminated Media
Surface Water Guidance Guidance for the Use of Wood Preservatives
Drinking Water Guidance Guidance to Determine Continual Operational Problems Necessitating Submittal of an Operation and Maintenance Manual
Surface Water Guidance Guide to Selection of Sediment Targets for Use in Idaho TMDLs
Drinking Water Guidance How to Demonstrate Financial, Technical, and Managerial Capacity in New Public Water Systems
Drinking Water Guidance How to Hire an Engineer for Public Water System and Wastewater System Design or Modification
Surface Water Guidance Idaho Antidegradation Implementation Procedures
Storm Water Guidance Idaho Catalog of Storm Water Best Management Practices
Ground Water Agreement Idaho Ground Water Protection Interagency Cooperative Agreement between Idaho DEQ, Idaho Department of Water Resources, Idaho State Department of Agriculture, Idaho Soil and Water Conservation Commission, Idaho Public Health Districts, and Idaho Department of Health and Welfare
Surface Water Guidance Idaho Mixing Zone Implementation Guidance
IPDES Guidance Idaho Pollutant Discharge Elimination System Application Program Description 2016
IPDES Letter Idaho Pollutant Discharge Elimination System Application, 2017 Cover Letter
IPDES Letter Idaho Pollutant Discharge Elimination System Application, 2017 Cover Letter
IPDES Letter Idaho Pollutant Discharge Elimination System Application, Attorney General’s Signed Certification
IPDES Letter Idaho Pollutant Discharge Elimination System Application, Governor’s Letter
IPDES MOA Idaho Pollutant Discharge Elimination System Application, Memorandum of Agreement (MOA) with EPA
IPDES Letter Idaho Pollutant Discharge Elimination System Application, Program Description
IPDES Guidance Idaho Pollutant Discharge Elimination System Compliance Monitoring Strategy
IPDES Guidance Idaho Pollutant Discharge Elimination System Compliance Monitoring Strategy
IPDES Guidance Idaho Pollutant Discharge Elimination System Designation Criteria and Selection Process for Small MS4s
IPDES Guidance Idaho Pollutant Discharge Elimination System Effluent Limit Development Guidance
IPDES Guidance Idaho Pollutant Discharge Elimination System Enforcement Response Guide
IPDES Guidance Idaho Pollutant Discharge Elimination System Industrial User Survey Guidance
IPDES MOU Idaho Pollutant Discharge Elimination System MOU with Idaho State Department of Agriculture (ISDA)
IPDES Guidance Idaho Pollutant Discharge Elimination System Public Participation in the Permitting Process
IPDES Guidance Idaho Pollutant Discharge Elimination System Technical Support Document Reasonable Potential Analysis Workbook
IPDES Guidance Idaho Pollutant Discharge Elimination System Tribal Participation Process
IPDES Guidance Idaho Pollutant Discharge Elimination System User’s Guide to Permitting and Compliance Volume 2—Publicly Owned Treatment Works
IPDES Guidance Idaho Pollutant Discharge Elimination System User’s Guide to Permitting and Compliance Volume 3—Non-POTW
IPDES Guidance Idaho Pollutant Discharge Elimination System User’s Guide to Permitting and Compliance Volume 4—General Permits Excluding Storm Water
IPDES Guidance Idaho Pollutant Discharge Elimination System User’s Guide to Permitting and Compliance Volume 5—Storm Water
IPDES Guidance Idaho Pollutant Discharge Elimination System User’s Guide to Permitting and Compliance Volume 6—Sewage Sludge (Biosolids)
Surface Water Guidance Idaho Waste Management Guidelines for Aquaculture Operations
Drinking Water Guidance Idaho’s Initial Monitoring Requirements for New Public Drinking Water Sources
Drinking Water Guidance Implementation Guidance for the Drinking Water Program – Ground Water Rule
Drinking Water Guidance Implementation Guidance for the Filter Backwash Recycling Rule
Surface Water Guidance Implementation Guidance for the Idaho Copper Criteria for Aquatic Life: Using the Biotic Ligand Model (BLM)
Surface Water Guidance Implementation Guidance for the Idaho Mercury Water Quality Criteria
Drinking Water Guidance Implementation Guidance for the Interim Enhanced Surface Water Treatment Rule
Drinking Water Guidance Implementation Guidance for the Long-Term 2 Enhanced Surface Water Treatment Rule
Drinking Water Guidance Implementation Guidance for the Long-Term One Enhanced Surface Water Treatment Rule
Drinking Water Guidance Implementation Guidance for the Stage 1 Disinfectants and Disinfection By-Products Rule
Drinking Water Guidance Implementation Guidance for the Stage 2 Disinfectants and Disinfection By-Products Rule
Surface Water Guidance Implementation of The 2016 Idaho Mixing Zone Guidance
Wastewater MOA Interagency agreement between DEQ and the Idaho Division of Building Safety – Plumbing Burerau
Air Quality Guidance Interpreting the Word “Addressed” in Subsection 210.20.
IPDES Guidance IPDES User’s Guide to Permitting and Compliance Volume 1—General Information
Wastewater Memorandum Large Soil Absorption System Ground Water Constituent Monitoring
Wastewater Guidance

Level 1 Nutrient-Pathogen Evaluation Mass-Balance Spreadsheet

Agency-wide MOA Memorandum of Agreement between the Idaho Department of Environmental Quality, the Idaho state Historic Preservation Office, and the city of Lewiston
Surface Water MOU Memorandum of Understanding (MOU) Implementing the Nonpoint Source Water Quality Program in Idaho
Agency-wide MOU Memorandum of Understanding Between DEQ and Idaho Dairymen’s Association, Inc.
Agency-wide MOU Memorandum of Understanding Between DEQ and Idaho’s Public Health Districts
Water Quality MOU Memorandum of Understanding Between DEQ and The Idaho Rural Water Association (IRWA)
Agency-wide MOU Memorandum of Understanding Between the Idaho Department of Environmental Quality and the British Columbia Ministry of Water, Land, and Air Protection
IPDES MOU Memorandum of Understanding for DEQ IPDES and US EPA – Development and Maintenance of the NPDES Electronic Reporting Tool NeT for ID Aquaculture
Water Quality MOU Memorandum of Understanding Water Quality Division Environmental Performance Partnership Agreement (WQ PPA)
Wastewater Memorandum Memorandum to Health District Environmental Health and DEQ – Subsurface Sewage Disposal Permits that Span Multiple Properties (Easements)
Wastewater Memorandum Memorandum to Health District Environmental Health and DEQ – Subsurface Sewage Disposal Permits that Span Multiple Properties (Easements)
Drinking Water Guidance Minimum Separation Distances
Air Quality Guidance Modeling Guidance
WM&R MOU Mountain Home Airforce Base and DEQ MOU
Wastewater Guidance Nutrient-Pathogen Evaluation Program for On-Site Wastewater Treatment Systems
Wastewater Guidance Pile Sampling White Paper
Drinking Water Guidance Point of Use Guidance
Ground Water Policy Policy for Addressing Degraded Ground Water Quality Areas
Air Quality Policy Policy on Reviewing a Request for Institution with Sensitive Population Status for the CRB Program
Drinking Water Guidance Potable and Non-Potable Line Crossings: Vertical Separation Requirements
Drinking Water Guidance Potable and Non-Potable Line Separations: Horizontal Separation Requirements
Drinking Water Guidance Procedure for Determining Ground Water Under the Direct Influence of Surface Water (GWUDI)
Drinking Water Guidance Protecting Drinking Water Sources in Idaho
WM&R Policy PS20-12 Hazardous Waste Management Act Civil Penalties
Drinking Water Guidance Recommendations for Hiring a Contract Operator: For Idaho Public Drinking Water and Public Wastewater Systems
Drinking Water Guidance Recommended Horizontal Separation Distances Between the Outside Wall of Drinking Water Line and the Edge of Storm Water Facilities
Wastewater MOU Regarding Regulation of Byproducts and Wastewater from Beef Cattle Animal Feeding Operations
Wastewater MOU Regarding Regulation of Byproducts and Wastewater from Cultured Dairy Production
Wastewater MOU Relative to Oil and Gas Conservation, Water Quality, Waste Facility Plans, and Air Quality
Wastewater SOP Reuse Permit Handoff Standard Operating Procedure
Drinking Water Fact Sheet Revised Total Coliform Rule: Level 1 & Level 2 Assessments and Corrective Actions
Drinking Water Fact Sheet Revised Total Coliform Rule: Repeat Monitoring Requirements for Small Systems
Drinking Water Fact Sheet Revised Total Coliform Rule: Requirements for Seasonal Systems
Drinking Water Fact Sheet Revised Total Coliform Rule: Requirements for Small Systems on Monthly Monitoring
Drinking Water Fact Sheet Revised Total Coliform Rule: Requirements for Small Systems on Quarterly Monitoring
Drinking Water Guidance Revised Total Coliform Rule: Sample Instructions
Drinking Water Guidance Revised Total Coliform Rule: Seasonal Start-Up Procedures
Wastewater Guidance Rule Interpretation for Land Application of Bagged Biosolids that Meet Class A Exceptional Quality Requirements
Surface Water Guidance Section 401 Water Quality Certification Guidance
Wastewater Guidance Seepage Test Spreadsheet for Electronic Method
Wastewater Guidance Seepage Test Spreadsheet for Manual Method or Hook Gauge
Drinking Water Guidance Setbacks from Drinking Water Wells to Features of Concern
Air Quality Manual Source Test Guidance Manual
Surface Water Guidance State of Idaho Guidance for Development of Total Maximum Daily Loads
Ground Water Guidance Statistical Guidance for Determining Background Ground Water Quality and Degradation
Drinking Water Guidance Surface Water Treatment Rule Compliance Guidance
Surface Water Memorandum Synching TMDLs with the Integrated Report
Wastewater Guidance Technical Guidance Manual
Surface Water Guidance Use Attainability Analysis Guidance 2019
Air Quality Guidance Visible Emissions, Guide to Evaluating
Wastewater Guidance Visual Sample Plan (VSP) software
Wastewater Guidance Wastewater Lagoon Seepage Test Statistical Review
Wastewater Manual Wastewater Land Application Operators Study and Reference Manual
Surface Water Guidance Water Body Assessment Guidance 3rd Edition
IPDES Policy Water Quality Administrative Penalty Guidance
Surface Water Protocol Water Quality Monitoring Protocols for Placement and Retrieval of Temperature Data Loggers in Idaho Streams
Surface Water Guidance Water Quality Trading Guidance

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