House Bill 12-1126

CPOW worked with key stakeholders and the Colorado Department of Public Health and the Environment (CDPHE) to address the key recommendations of the ISDS Steering Committee which was established in 2002 by CDPHE. In addition to the Steering Committee’s key recommendations, CPOW tried to introduce a bill in 2011 that reflected our understanding of the common ground recommendations of the 2009 CDPHE onsite wastewater stakeholder process and experienced onsite wastewater professionals from across the country. While not successful, CPOW introduced a bill in the 2012 Colorado Legislative Session that was successful.

House Bill 12-1126 to update the State Statute on Onsite Wastewater Treatment Systems

On-site Wastewater Treatment Systems Regulation 43

Regulation 43 was adopted by The Colorado Department of Public Health and Environment (CDPHE) on May 13, 2013 and became effective June 30, 2013. Local boards of health were required to implement new regulations that comply with Regulation 43 for on-site wastewater treatment systems <2,000 gallons per day by June 30, 2014.

Please see the CDPHE website for additional information.

Regulation 43 can be found here.

Non-Pressurized Drip Dispersal System (NDDS)

The NDDS system is recognized as a type of an Evapotranspiration/Absorption system and is therefore accepted as a proper means of effluent dispersal as long as the CPOW design document is followed. Further note that the September 2016 CPOW NDDS document will be referenced in the proposed revisions to Regulation 43 as a type of an Evapotranspiration/Absorption system. Therefore, all future designs which propose an NDDS as a means of effluent dispersal must be designed in accordance with this updated document.

CPOW Guidance Document for NDDS-Final Revised September, 2016


Regulation 43 Update Stakeholder Process

The first meeting to begin the stakeholder process for the Regulation 43 update was August 27, 2015.

Scope of regulation revision: The intent is to keep the scope of this revision somewhat narrow. It will mostly focus on addressing items that may appear to be in conflict, and will provide additional clarification for sections that may not afford a clear direction. However there are a few specific items that will require a larger scale modification. These items will be clearly identified during this initial meeting. The intent of all revisions to Regulation 43, as directed by the Water Quality Control Commission, will be to continue the focus on wastewater “treatment” over disposal and to stay the course to bring the Colorado OWTS regulations in line with accepted industry standards.

CDPHE Stakeholder Website

Information as to how you can be included in the stakeholder process:

1) Go to the OWTS web page at,

2) Next click on the section titled, “Stakeholder information for revisions to Regulation 43”

3) Next click on, “Email list registration for stakeholders and item specific workgroups.”

4) Follow directions as indicated.

Only those on this list will receive regular email information regarding the revisions to Regulation 43.

Also on the OWTS web page you will find a form that must be used in order to provide comments or suggestions relative to the regulation revision.

The link can be found just prior to the workgroups overview at:

In order to initiate the meetings for the individual work groups in the near future, we are requesting that all comments be provided to the Division by Sept. 18, 2015.

Please forward this information to any and all groups that you think may be interested in the regulation revision process.


Grease Waste Regulation

Link to more information: CDPHE Information

Summary of regulation:

A new Section 18 to address waste grease has been added to the Colorado solid waste regulations due to passage of House Bill 10-1125, required the Department to adopt regulations regarding the collection, transportation and disposal of trap grease and yellow grease. The regulations include provisions regarding the registration of individuals, facilities and vehicles that collect, transport, store, process or dispose of grease, personal use of waste grease, use of a manifest to track waste grease transportation, establishment of financial assurance, annual reporting requirements and annual registration fees. The new regulations require transporters of waste grease (yellow grease or trap grease), facilities that collect, store, process, or dispose of waste grease, and individuals who collect or transport waste grease for personal use (other than for use as biofuel) to  register by March 16, 2012 with the Colorado Department of Public Health and Environment (the Department).

EPA considers phosphorus and nitrogen level changes

OSHA publishes crane signal person requirements


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