Water resources are a critical issue across the United States. Addressing water issues requires public understanding, acceptance, support, and participation. This study compared the public's perceptions and knowledge of Oklahoma water over time. A 53-item paper questionnaire was administered to a randomly sampled mailing list of Oklahoma residents in 2008 and 2018. There were no statistically significant differences between the public's perception in 2008 and 2018. Participants were mostly unaware of what watersheds are, and their perceptions and behaviors were seemingly unaffected by changes in weather patterns and water education efforts. When questioned about their knowledge of water issues, the most frequent response was 'don't know'. Results suggest improved education and outreach is needed to advance the public's water knowledge. Furthermore, this study found that long term evaluations of public perceptions, behaviors, and knowledge are extremely important in determining education program effectiveness. In this case, findings indicate status quo will not yield needed changes.