Water Quality Trading

Water quality trading (WQT) is an innovative, market-based, cost-effective mechanism to help achieve local water quality improvements (EPA, 2003). In WQT, sources with high costs of reducing pollution can purchase equal or greater pollution reductions from sources with lower costs. This cost difference provides an incentive for trading to occur.

WQT Program Development in Louisiana

LDEQ is currently developing a WQT program, supported by state legislation and consistent with the Clean Water Act, and state and federal law, to facilitate trading among watershed stakeholders interested and eligible in participating in trading opportunities. This WQT program will allow participation by both point sources and nonpoint sources to help achieve water quality goals.


July 20, 2019 - LDEQ posted a Potpourri Notice to announce changes to address comments received during the public comment period of the Water Quality Trading (WQ099) Proposed Rule.

January 20, 2019  - Water Quality Trading (WQ099) Proposed Rule in Louisiana Register, Vol. 45, No. 01, January 20, 2019.  Please see the NOI for details.


Stakeholder Interactions

October 4, 2018 - Water Quality Trading Stakeholder Meeting

 September 20, 2018 - Water Quality Trading Stakeholder Meeting

August 27, 2018 - Water Quality Trading Stakeholder Meeting

July 10, 2018 - Water Quality Trading Stakeholder Meeting

June 13, 2018 - Water Quality Trading Stakeholder Meeting

January 23, 2018 - Water Quality Trading Stakeholder Kick-off Meeting

December 20, 2017

LDEQ posted a Potpourri Notice to announce a kickoff stakeholder meeting in January 2018 and share draft guidance to invite feedback on topics to shape stakeholder discussions regarding water quality trading program development in Louisiana.

Basics of WQT

According to the EPA Trading Policy (2003) and the EPA Water Quality Trading Assessment Handbook (2003), a buyer (e.g. a pollution source such as an industrial facility) purchases water quality improvements, or credits, from a seller (e.g. a farmer installing a buffer along a stream to capture sediment runoff or a facility installing technology that achieves reductions greater than established WQBEL requirements) that reduces pollutants. Both buyers and sellers will need to meet a minimum level, or baseline, before generating credits. The baseline for generating pollution reduction credits must be consistent with applicable water quality standards. In general, a credit is a reduction in pollutant loads beyond baseline conditions. More specifically, it is a measured or estimated unit of pollutant reduction per unit of time adjusted to account for applicable trading ratios. A seller generates excess load reductions by controlling its discharge beyond what is needed to meet its baseline through controlling its flow and/or its discharge concentrations. A buyer can then use the credits to meet a regulatory obligation.

 EPA lists trading objectives for economic, social, and environmental benefits. These benefits include:

  • Reduces the total cost of achieving water quality goals.
  • Provides a cost-effective method for achieving compliance with water quality standards.
  • Provides incentives for innovations in pollution-reduction technology.
  • Achieves equal or greater reduction of pollution at equal or lower cost.
  • Creates an economic incentive for dischargers to go beyond minimum pollution reduction.
  • Offsets new or increased discharges resulting from urban growth.
  • Reduces cumulative pollutant loading, improves water quality and prevents future environmental degradation.
  • Provides ancillary environmental benefits such as carbon sinks, flood retention, riparian improvement, and habitat.
  • Encourages dialogue among stakeholders and fosters concerted and holistic solutions for watersheds with multiple sources of water quality impairment.


Additional WQT Resources

Louisiana Revised Statute R.S. 30:2074.B.(9)(a) http://www.legis.la.gov/Legis/Law.aspx?d=87135.

Louisiana State Legislature, Act 371, 2017 Regular Session, Effective June 23, 2017 http://www.legis.la.gov/Legis/BillInfo.aspx?s=17RS&b=ACT371&sbi=y.

National Network on Water Quality Trading publication Building a Water Quality Trading Program: Options and Considerations, 2015 http://willamettepartnership.org/publications/.

Association of Clean Water Administrators (ACWA) Water Quality Trading Toolkit, 2016 https://www.acwa-us.org/toolkits/water-quality-trading-toolkit/.

Water Quality Trading Case Studies through ACWA - https://www.acwa-us.org/water-quality-trading-case-studies/.

References from Draft Guidance Document

Byron K. Williams, Robert C. Szaro, & Carl D. Shapiro, Adaptive Management: The U.S. Department of the Interior Technical Guide, pp. v & 1 (U.S. Department of Interior, 2009), available at http://www.usgs.gov/sdc/doc/DOI-%20Adaptive%20ManagementTechGuide.pdf.

EPA, A Long-Term Vision for Assessment, Restoration, and Protection under the Clean Water Act Section 303(d) Program, (2013), available at https://www.epa.gov/sites/production/files/2015-07/documents/vision_303d_program_dec_2013.pdf.

EPA, Nonpoint Source Program and Grants Guidelines for States and Territories, p. 7, note 2 (2013), available at https://www.epa.gov/sites/production/files/2015-10/documents/319-guidelines-fy14.pdf.

EPA, Office of Water, NPDES Permit Writer’s Manual, Ch.9, pp.1 (Sept 2010), available at https://www.epa.gov/sites/production/files/2015-09/documents/pwm_chapt_09.pdf.

EPA, Office of Wetlands, Oceans and Watersheds, Guidance for 2006 Assessment, Listing and Reporting Requirements Pursuant to Sections 303(d), 305(b) and 314 of the Clean Water Act, Section 5, (2005), available at https://archive.epa.gov/water/archive/web/pdf/2005_08_11_tmdl_2006irg_report_2006irg-sec5.pdf.

EPA, Water Quality Trading Policy, 68 Fed. Reg. 1608, p. 1609 (Jan. 13, 2003), available at http://www.gpo.gov/fdsys/pkg/FR-2003-01-13/pdf/03-620.pdf.

LDEQ Water Quality Management Plan is available at: http://deq.louisiana.gov/page/water-quality-management.

Louisiana Coastal Master Plan can be found at http://coastal.la.gov/our-plan/.

Natural Resources Conservation Service, Conservation Practice Standard: Nutrient Management, Code 590, pp. 6-­7 (2012), available at http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1046896.pdf.

United States Department of Agriculture-Natural Resources Conservation Service (USDA-NRSC) Field Office Technical Guide (FOTG) found at http://efotg.sc.egov.usda.gov.

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