据美国联邦公报消息，美国环保署（EPA）发布终期条例，当使用嵌入氧化亚铜聚合物发射头的灌溉系统灌溉农作物时，豁免氧化亚铜在肉、奶、家禽、蛋、鱼、贝类产品或灌溉作物内部或表面的残留限量要求。本条例自7月1日起生效。
部分原文报道如下：
This regulation amends the tolerance exemption for copper in/on meat, milk, poultry, eggs, fish, shellfish, and irrigated crops when it results from the use of cuprous oxide embedded in polymer emitter heads used in irrigation systems for root incursion prevention. This regulation eliminates the need to establish a maximum permissible level for residues of copper resulting from this use of cuprous oxide.
