CDSN Minimum Data Elements Fact Sheet -- 7/1/2015 (CDPHE WQCD) WQCD Appendix B of Policy 17-1 Voluntary Incentive Program for Early Nutrient Reductions Regulation #85 – Section 85.5(1.5) Guidance -- 10/13/2020 (EPA reference required by CDPHE WQCD Nutrients program) Best Practices for Submitting Nutrient Data to the Water Quality eXchange (WQX) Guidance -- 6/2/2017 (CDPHE WQCD) WQCD Regulation 85 Result Detection Limit and Lab Code Guidance -- 3/1/2015 (CDPHE WQCD) WQCD Regulation 85 Sufficiently Sensitive Analytical Methods -- 5/31/2016 (CDPHE WQCD) WQCD Regulation 85 Analytical methods approved for use in Regulation 85 nutrient monitoring