Online Services







Air Emission Inventory Entry System

Enter air emissions for your permitted/registered facility

Clean Water Act Information

Find information about the quality of Montana’s rivers, streams, lakes and wetlands

DEQ eBill Payment Service

Pay an invoice from the Department of Environmental Quality

FACTS: Water Discharge Permitting System

Pay Fees, Apply for, or Renew Water Discharge Permit applications Online

Hazardous Waste Handlers

Find locations of businesses or entities that are registered as hazardous waste handlers

Montana Drinking Water Watch

Find a wide range of public water supply system information

Petroleum Tank Release Cleanup Fund Claims & Reimbursements

Facilities for which tank owners and operators have submitted claims for reimbursement

Source Water Protection Query system

Find information regarding source water supplies

TankHelper II

Training for owners and operators of underground storage tanks

Today's Air Application

Find Air Quality levels and Air Monitoring Stations in Montana

Underground Storage Tank Query System

Location and information of underground storage tanks in Montana

Water Quality Library Search

Find items in the Department of Environmental Quality’s Water Quality Planning Library