ID#: 8633
This historic 1935 map of Minnesota, had been digitally enhanced, and depicted the location of the state’s sewage treatment plants at that time. As was one of a series of instructional drawings, this image was used by the Minnesota Board of Health to train its state public health workers. The purpose of these images, and the training was focused on protecting potable water supplies from bacterial contamination.
High Resolution: Click here for hi-resolution image (25.94 MB)
Content Provider(s): CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
Creation Date: 1935
Photo Credit:
Links: Minnesota Health Department
Minnesota Health Department; R.N. Barr Library
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.