Water quality: Draft permit actions

The division is seeking public input on the draft permit actions listed below.  Anyone can submit comments. You usually have 30 days to make comments on the proposed action, check the exact deadline in the permit list below. Contacts for each permit action are also included in the list below. Comments may be addressed to the listed contact.
Questions about public notice actions or requests for hard copies of drafts can be made by phone:
                    303-692-3517 Dial 0 for live assistance (8 a.m. - 5 p.m. Mon-Fri) or leave a message.

Use this permit comment form for all comments on permits noticed. 

Instructions on how to use the template:

  • Please email your completed public comments form as a Microsoft Word document to the permit writer. (listed in the table below). 
  • If you would like, please feel free to submit the comments as a PDF as well but the division will use the Word document for our responses. 
  • If you would like the division to review additional reference documents, please describe and reference them in the public comment form. 
  • There is no character or word limit for this chart.
​2021 Public notice schedule

Jan. 14, Feb. 11, March 11, April 8, May 13, June 10, July 8, Aug. 12, Sept. 9, Oct. 14, Nov. 11, Dec. 9.
​Public Notice Summaries

September 9, 2021 Public Notice Summary

August 12, 2021 Public Notice Summary

July 08, 2021 Public Notice Summary


Permit number/
Permit writer
Public Notice Documents
Permit Records
Modification 3
Domestic Wastewater
Telluride, City of
Telluride Regional WWTF
San Miguel River
San Miguel County

Ana Ruiz
41840    Documents CO0041840  9/9/2021 10/11/2021
Modification 1
CDPS General
CDPS General Permit COG590000 
Domestic Wastewater Treatment Plants that Discharge to
Receiving Waters with a Chronic Low Flow: Design Flow Ratio of 100:1 or Greater and not Discharging to Waters that are Designated as Threatened and Endangered Habitat
Christine Wehner
590000    Documents COG590000  8/12/2021 9/13/2021
Modification 1
CDPS General
CDPS General Permit for Discharges from Municipal Separate Storm Sewer Systems (MS4's)
Mary Welch
70000   Documents COR070000  8/12/2021 9/17/2021
Modification 5
Domestic Individual
Mount Crested Butte Water and Sanitation Distict
Mount Crested Butte WSD WWTF
Woods Creek
Gunnison County
Christine Wehner
27171    Documents CO0027171 8/12/2021 9/13/2021
Modification 3
Industrial Individual
Tri-State Generation and Transmission Assn Inc
Rifle Station
Tributary to Dry Creek and Dry Creek
Garfield County
Alex Powell
42447    Documents CO0042447 8/12/2021 9/13/2021
Industrial Individual
Climax Molybdenum Co
Urad Minesite, Henderson Mine and WWTF
Woods Creek, Lower URAD Reservoir and West Fork Clear Creek
Clear Creek County
Emily Mortazavi
41467    Documents CO0041467 8/12/2021 10/13/2021


Notice: Accepting Comments on Draft New Clean Water Policy 14

The Water Quality Control Division is accepting comments on a new Draft Clean Water Policy 14 - Reporting and Permitting of Discharges from Gravity Flow Dewatering Systems for Select Activities. The draft can be found at this link. Please send any questions or comments to margo.griffin@state.co.us. The deadline for comments is October 11, 2021.

Notice: Accepting Comments for Minor Revision to WQP-20

Pursuant to Water Quality Control Division Policy 1 (Implementation Policy Framework) and 
Water Quality Control Division Procedure 1, the Water Quality Control Division (division) periodically reviews issued policies. Upon a routine review of WQP-20 (Baseline Monitoring Frequency) this year, the division found a few small typographical errors in WQP-20. The division now proposed to correct these errors, as shown in this WQP-20 redline through a minor revision. Procedure 1 §9

The division is now accepting comments upon these proposed minor revisions to WQP-20 and any other typographical errors that should be corrected in WQP-20. Please send any comments to meg.parish@state.co.us. The deadline for comments is October 11, 2021.

Please note that the division does not have the time or resources to more fully re-evaluate the substance of WQP-20 at this time. Any comments that address the substance of WQP-20 will be saved in the division’s files, but not addressed in this minor revision. 

PFAS Responsive Comments

A responsive comment period is now open for draft modifications to Permits CO0026638, CO0026409, and CO0032999. If issued, these modifications would require these three large wastewater treatment plants to monitor monthly for a variety of PFAS for two years, along with other requirements.

The deadline for responsive comments is September 17, 2021.

During the responsive comment period, anyone may respond to a comment submitted to the division during the initial public comment period (June 10-August 9, 2021). You do not need to have filed an original comment to submit a responsive comment. You may find these comments in the permit files:  

CO0026638 (Metro)

CO0026409 (Broomfield)

CO0032999 (South Platte Renew/Littleton Englewood)

In providing a responsive or rebuttal comment you must specifically refer to the original commenter and the comment. You can use this chart showing the original comments to submit responsive comments. Please note that this chart does not include some submitted tables and does not include attachments. 

Responsive comments can be emailed to the permit writer: Ana Ruiz, ana.ruiz@state.co.us or mailed to the division at the following address: CDPHE, WQCD-P-B2, 4300 Cherry Creek Drive South, Denver, Colorado 80246-1530.

The deadline for these responsive comments is September 17, 2021. A later rebuttal period will then start where you can file comments addressing the responsive comments. The deadline for the rebuttal comment period is September 27, 2021.


The end date of the public comment period for these draft permits was August 9, 2021. The division received a request for a responsive comment period for the draft permit modifications for Permits CO0026638, CO0026409, and CO0032999 on August 19, 2021. The division granted the request pursuant to Regulation 61.5(2)(d)(i)(B), whereby the division may grant a responsive comment period upon request.