EPA proposed to promulgate an aquatic life designated use that includes propagation and protective water quality criteria for dissolved oxygen for Zone 3, Zone 4, and upper Zone 5 of the Delaware River.
The Department of Environmental Quality proposed amendments to La. Admin. Code tit. 33, §1123. The proposed amendments would classify a subsegment of Mermentau River Basin as naturally dystrophic and establish seasonal dissolved oxygen criteria based on an addendum to a use attainability analysis that was conducted in the basin. A hearing will be held July 25, 2019. Comments are due August 1, 2019. See https://www.doa.la.gov/osr/REG/1906/1906.pdf (pp. 776-77).
The State Water Control Board proposed amendments to 9 Va. Admin. Code §25-260-185. The proposed amendments would include a reference to the November 17 Chesapeake Bay Criteria Assessment Protocols Addendum, which directs how Chesapeake Bay dissolved oxygen criteria should be assessed. Comments are due December 26, 2018. See http://register.dls.virginia.gov/vol35/iss07/v35i07.pdf (pp. 1026-31).
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