ACHD's stormwater permits are required by the Clean Water Act and administered by the Idaho Department of Environmental Quality. The Phase I stormwater permit became effective October 1, 2021 and the Phase II stormwater permit became effective February 1, 2021.

ACHD submits two annual stormwater permit reports to the Idaho Department of Environmental Quality each year.

• Annual Reports - Phase I Permit Area
• Annual Reports - Phase II Permit Area

• Stormwater Pollution Hotline Fact Sheet
• Household Hazardous Waste Video

• Construction Site Discharge Control Program Webpage
• ESC Plan template
• Dewatering Permit Applications
• General Dewatering Permit
• Hydrant Dewatering Permit
• Utility Vault Dewatering Permit
• Responsible Person Certification
• Idaho Catalog of Stormwater BMPs
• Policy 8300 – Construction Site Discharge Control Program
• Policy 6000 – Construction, Permits & Inspection
• Storm Drain Location Map (GIS Application)

• NPDES Stormwater Outfall Monitoring Plan - Phase I
• NPDES Temperature Monitoring Approach - Phase I
• Americana Subwatershed Monitoring Plan
• Monitoring and Assessment Plan - Phase II
• Dry Weather Outfall Screening Plan
• Quality Assurance Program Plan

You can help keep storm drain inlets clear of debris, snow, and ice to prevent clogging, flooding, and pollutant discharges. Use our map application to locate storm drain inlets near you.

• Department of Environmental Quality (IDEQ)
• Environmental Protection Agency (EPA)
• Partners for Clean Water