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Progress on the Chesapeake Bay TMDL and Challenges in Meeting the 2025 Pollution-Reduction Loads

机译:切萨皮克湾TMDL的进展以及在实现2025年减少污染负荷方面的挑战

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In December 2010, EPA released the TMDL for the Chesapeake Bay. Specifically, the TMDL sets Bay watershed limits of 84.4 million kg/yr of nitrogen, and 5.7 million kg/yr of phosphorus, a 25% reduction in nitrogen and 24% reduction in phosphorus. Agriculture is the largest single source of nitrogen, phosphorus, and sediment loading to the bay. Each state was to reduce nitrogen, phosphorus, and sediment TMDL target reduction loads by 60% by 2017. West Virginia is the only state that has achieved their 2017 target load reductions for nitrogen, phosphorus, and sediment. Maryland, Pennsylvania, Virginia, and New York have not achieved their 2017 nitrogen load reductions for agriculture. Septic tank nitrogen loads have increased in Maryland and Virginia.
机译:2010年12月,EPA发布了切萨皮克湾(Chesapeake Bay)的TMDL。具体来说,TMDL将海湾分水岭的氮含量设定为8440万公斤/年,磷含量设定为570万公斤/年,其中氮含量降低25%,磷含量降低24%。农业是海湾中最大的氮,磷和沉积物单一来源。到2017年,每个州都将氮,磷和沉积物的TMDL目标削减负荷降低60%。西弗吉尼亚州是唯一实现2017年氮,磷和沉积物目标削减负荷的州。马里兰州,宾夕法尼亚州,弗吉尼亚州和纽约州尚未实现2017年农业氮负荷减少量。在马里兰州和弗吉尼亚州,化粪池的氮负荷增加了。

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