RD630 - Review of Wastewater Nutrient Concentrations and Trends in Virginia’s Chesapeake Bay TMDL Phase III Watershed Implementation Plan – December 1, 2020

Executive Summary:

The Department of Environmental Quality convened a stakeholders workgroup and completed a review of “the assumptions used in estimating the effluent nutrient concentrations and trends of wastewater facilities and to identify cost-effective options to achieve wastewater nutrient load levels with reasonable assurance consistent with the needs of the Chesapeake Bay TMDL Phase III Watershed Implementation Plan" in accordance with 2020 Va. Acts Ch. 1289 Item #377 F.2.  The results of that review found that although the assumptions used in estimating nutrient concentrations and loads for the wastewater sector were conservative, the assumptions did not impact the decision to include proposed municipal floating wasteload allocations (WLAs) in Initiative #52 of the Chesapeake Bay Phase III Watershed Implementation Plan.  Furthermore, as explained in this report, the proposed municipal floating WLAs included in Initiative #52 represent the Commonwealth’s best opportunity to achieve the additional significant, reliable and timely nutrient reductions necessary under the TMDL.