Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Lakes, Streams & Wetlands

Program Overview

The Water Quality Planning Bureau is responsible for administering four vital functions related to the Clean Water Act. 

Visit the Clean Water Act Information Center on the Resources page to find information about the quality of Montana's rivers, streams, and lakes in relation to Montana's water quality assessments. These assessments are based on available statewide water monitoring data and information. The Clean Water Act Information Center also provides access to Montana's Water Quality Reports and List of Impaired Surface Waters, as well as online search and mapping tools.

Clean Water Act Information Center Water Quality Planning Bureau Dashboard

Water Quality Planning Contacts

Bureau Chief
Andrew Ulven  (406) 444-2680

Submit Data

DEQ provides detailed guidance to organizations, individuals, and laboratories on how to submit ambient water quality data to DEQ. Montana uses a system called the Montana EquIS Water Quality Exchange (MT-eWQX) to store water quality monitoring data, including physical, chemical, biological and habitat data, from locations across the state. Once verified, these data are submitted to EPA's Water Quality Portal, where they are publicly available.

The steps below are provided to help organizations and volunteers submit their data through DEQ's data portal.

Step 1: Prepare Your EDD

Data must be submitted to MT-eWQX in a specific electronic format known as an Electronic Data Deliverable (EDD). Data providers are required to download the MT-eWQX EDD and populate it with the project data to be submitted. Detailed guidance for populating the MT-eWQX EDD can be found in the MT-eWQX Guidance Manual.

MT-eWQX EDD MT-eWQX Guidance Manual


Step 2: Validate Your EDD

After the MT-eWQX EDD is populated, all data must be validated using the EQuIS Data Processor (EDP). The EDP is a standalone application that allows data providers to check their EDD files prior to submission to ensure they are formatted correctly. The EDD must have a clean validation from the EDP prior to data submission to DEQ. Refer to the EDP Guidance Manual for detailed instructions.

EDP Guidance Manual Download EDP

Step 3: Submit Your EDD

In order to submit an EDD, the following are required:

  • Completed MT-eWQX Data Submittal Form
  • Final MT-eWQX EDD
  • Associated project QAPP and/or SAPs and any other attached documents referenced in the EDD

Information about all the above requirements can be found within the MT-eWQX Guidance Manual.

If you need assistance during the EDD submittal process, contact Deanna Tarum or Jolene McQuillan.

Additional Information

The following field forms are provided by DEQ to assist with project data management:

Subscribe for Important Updates

Receive important updates about MT-eWQX, including when updated reference value lists are posted, anticipated outages for maintenance, or training opportunities.

Subscribe: MT-eWQX ListServ
Information for Laboratories

Laboratory MT-eWQX EDD

This link is provided to assist laboratories in producing a MT-eWQX compatible EDD. The requirements provided in this document are specific for laboratories and should not be used by data providers submitting data to DEQ.

NOTE: Labs are required to report both the Method Detection Limit (MDL) and Lower Reporting Limit (LRL) for each result. The MDL value as defined by EPA (40 CFR Appendix B to Part 136) is required. The LRL shall be the value the lab defines as the lower limit of quantitation.

The following templates are provided by DEQ to assist labs in producing a MT-eWQX compatible EDD:

Need Help?

If you need assistance during the EDD submittal process, contact Deanna Tarum.