Boundary Waters Canoe Area (Minnesota) sewage no-discharge zone, 1977, EPA HQ OWOW

This geospatial dataset depicts a sewage no-discharge zone established under Clean Water Act Section 312. The area(s) depicted are zones where the discharge of any...本地理空间数据集展示了依据《清洁水法》（Clean Water Act）第312条设立的污水禁排区。本次标注的区域为任何……的排放均被禁止的区域。