Use the advanced search to search for words in the title or other specific fields. Or type your terms into the box at the top right of the page to search everything, including the full text. The Internet Archive holds many documents containing information on the waters of Illinois. Search results can be viewed online, or downloaded in a variety of formats. You can also search within specific documents to find mentions of your topic.

---

Founded in 2008, HathiTrust is a not-for-profit collaborative of academic and research libraries preserving 17+ million digitized items. Contains many government documents and is a great source for finding information on the waters of Illinois. Items not restricted by copyright are available full text, and it is possible to search within documents to find mentions of a topic, even if the item is not available as full text. Simple and advanced searching is available for catalog records or full text. You can also search within a specific document for mentions of a topic. Item and page level permalinks are offered.

---

Search the U.S. Environmental Protection Agencies document database. Many full text documents are available. This is a good source for federal environmental studies and assessments of Illinois waters.

---

A U.S. Geological Survey (USGS) Trusted Digital Repository providing access to scientific data products and resources. Access documents, maps, and data, including many items produced by the Illinois State Geological Survey.

Find and download ISWS publications, search or browse whole collection or by series.

---

Online access to the ISWS map series. Physical copies of some maps are available upon request.

---

Full text of the IWRC publications in IDEALS, organized by topic.

---