Septic (Wastewater Treatment) and Subdivisions

Subdivision:

• Online Joint Application – Engineering Infrastructure & Subdivisions | Montana DEQ (mt.gov)
• Planning Department Verification (Required with EHS copy of Sub Application)

Wastewater Treatment:

Due to staffing shortages and high volume of permits, wastewater review timelines are now around 45 days. We are working hard to return to our normal 30-day turnaround as soon as possible.

How can you help?

• Submit completed applications (incomplete applications delays the process).
• Submit full responses to information requests – partial packets will not be reviewed.

**Please note: if we have to request more information, the review clock will start over. We cannot expedite additional info reviews at this time.

• Extension Request
• Financial Assistance Options for Installation of New and Replacement Sanitary Water and Wastewater Systems
• Click here to be a Registered Installer
• Intent to Groundwater Monitor
• Planning Department Verification Required with Septic Application)
• Site Evaluator / Professional Engineer Registration Application
• System Certification
• Variance Application Packet
• Wastewater Treatment System Permit Application
• Fee Schedule

Public Water Supply and Wastewater Treatment Systems:

• Circulars
• Groundwater Discharge Permits
• Laws and Rules
• Nondegradation
• Well Drillers Rules (ARM)

Subdivisions:

• Circulars
• DEQ Rules (ARM)
• GW Discharge Permits
• MT Law (MCA)
• Nondegradation Overview
• Nondegradation Policy
• Nondegradation Water Quality Rules
• How to perform a Nondeg Analysis, Must also meet Local Wastewater Treatment Regulations – See Below

Wastewater Treatment:

• Local Health Code Chapter 3
• ARM 17.36.9
• Circular DEQ 4
• Nondegradation
• Fee Schedule