water sense
Household leaks cost the country more than a trillion gallons of water a year—enough to quench the water needs of roughly 11 million homes. The common culprits are toilet flappers, dripping faucets, and other leaky valves. Fortunately, there are easy steps you can take in your home and yard to save water and money. And that’s what Fix a Leak Week, March 16-22, is all about. 
 
Sponsored by EPA’s WaterSense program, Fix a Leak Week offers demonstration events and online resources to help homeowners find and fix leaky toilets, shower heads, and more. 
 
IISG is joining the celebration with the release of our Household Water Efficiency brochure. Created in partnership with the Northwest Water Planning AllianceMetropolitan Planning Council, Chicago Metropolitan Agency for Planning (CMAP), and EPA, the brochure provides do-it-yourself tips for lowering your water bill by about 10 percent. 
 
Household Water Efficiency is part of a larger effort to help individuals and communities secure a sustainable water supply. The Chicago region has long benefited from an abundance of fresh water. But legal limits on how much can be pulled from Lake Michigan and strained aquifers have left many concerned that demand will outpace supply. 
 
In response to these concerns, CMAP led the development of a comprehensive water supply management plan for the 11 counties in the greater Chicago area. IISG research, including an overview of water rates, provided critical data for key components of the plan. IISG also developed a guide that helps city officials plan and implement water rates that encourage conservation and provide sufficient funding for utilities to detect and fix leaks in their water systems.
 
To learn more, visit our Water Supply page.

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Join the 2026 Great Lakes BioBlitz! 🌎🦋📸Starting Earth Day, educators, students, youth groups, and families are invited to help document biodiversity across the Great Lakes region using iNaturalist. A kick-off webinar is scheduled for April 16th at 2 pm CT.Participate anytime during the four‑week event. Snap photos, make observations, and contribute to real conservation data while getting students outside and engaged with nature. Learn more and get ready to explore: https://sites.google.com/wisc.edu/annual-great-lakes-bioblitz/2026 #TeachingTuesday#GreatLakes
Don’t miss out! Join us for a deep dive into the latest Lake Michigan fisheries science.Topics will include:-Reef restoration impacts on aquatic and fish species-Wild reproduction rates for salmon and trout species from the Great Lakes Mass Marking Program-Fisheries update from the Illinois Department of Natural ResourcesLearn more & register: https://purdue.ca1.qualtrics.com/jfe/form/SV_86eBlPnbjdm7pPg
Celebrate Earth Day with freshwater science and good conversation! Join Illinois-Indiana Sea Grant, the Northwestern Center for Water, Loyola University researcher Tim Hoellein, and IISG’s Sarah Zack for Science Sips: Trash Talk about Chicago Waterways. Learn what research reveals about litter and trash in Lake Michigan and Chicago waterways and what we can do to help.Plus, enjoy Great Lakes trivia games!📅 April 22, 2026⏰ 7–9 PM📍 Sketchbook Brewing Company, Evanston Tap RoomCome curious and ready to test your Great Lakes knowledge!