File:ChicagoRiver.svg
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Source: Surface-Water-Quality Assessment of the Upper Illinois River Basin in Illinois, Indiana, and Wisconsin--Pesticides and Other Synthetic Organic Compounds in Water, Sediment, and Biota, 1975-90, page 21 (PDF page 30)
- which is modified from Terrio, P.J., 1994, "Relations of changes in wastewatertreatment practices to changes in stream-water quality during 1978–88 in the Chicago area, Illinois, and implications for regional and national water-quality assessments: U.S. Geological Survey Water-Resources Investigations Report" 93-4188, 56 p.
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This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:24, 11 April 2007 | | 1,023 × 1,421 (218 KB) | Interiot | |
| 18:20, 11 April 2007 |  | 490 × 681 (217 KB) | Interiot | ||
| 18:18, 11 April 2007 |  | 490 × 681 (226 KB) | Interiot | ||
| 10:39, 11 April 2007 |  | 490 × 681 (281 KB) | Interiot | ||
| 10:31, 11 April 2007 |  | 490 × 681 (284 KB) | Interiot | Source: [http://il.water.usgs.gov/nawqa/uirb/pubs/reports/WRIR_96-4135.pdf Surface-Water-Quality Assessment of the Upper Illinois River Basin in Illinois, Indiana, and Wisconsin--Pesticides and Other Synthetic Organic Compounds in Water, Sediment, and Bio |
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