For trophic weighted residue (TWR), the 2018 Georgia Water Quality report prepared by Georgia EPD as an integrated document in the 305(b)/303(d) list, states “Mercury is a naturally occurring metal that cycles between the land, water, and the air. As mercury cycles through theWITHLACOOCHEE RIVER (R031102030403) — FC, TWR | Lowndes County, GA, Stream Monitoring and Stormwater Permit | 28 April 2020 |
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