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Overflow Action Alert

The MWRD has issued an Overflow Action Day alert. Please limit water usage to absolute necessities. Visit our Overflow Action page for more information.


Metropolitan Water Reclamation District of Greater Chicago

The MWRD has partnered with the Illinois Monarch Project to help save monarch butterflies, the official state insect of Illinois. You can help, too! 

The monarch butterfly population has shrunk in the last several years, mostly because of climate change and habitat loss. This habitat loss is caused by urban development, poor land management practices, illegal logging and the use of pesticides. 

Milkweed is the only food the monarch butterfly caterpillar eats. By planting milkweed, you can help provide them with the necessary food and habitat. Milkweed is also a native plant that can help absorb rainwater that would otherwise contribute to flooding.  

A monarch caterpillar on a milkweed plant at the Stickney WRP
The Illinois Monarch Project is trying to grow 150 million new milkweed plants by 2038.


Plant our free milkweed seeds

We will send you a free packet of milkweed seeds when you take our online pledge to help save the monarchs (while supplies last).

Please allow up to three weeks for delivery. Once you receive your packet, follow the directions on the back cover for preparing and planting your seeds. 


Milkweed seeds are not meant for human consumption and can be harmful if digested. Keep out of the reach of children and pets.

How milkweed helps our environment

Milkweed is a native plant to the Chicago region that provides food and shelter for monarch butterflies.  Planting milkweed and other native plants is an effective way to help protect your home from flooding, provide a habitat for wildlife, and improve water quality by absorbing rainwater where it falls. 

For more information about gardening with native plants, see our Green Neighbor Guide, a manual about how you can help reduce flooding in your area. 

Monarch waystations  

As part of our partnership with the Illinois Monarch Project, the MWRD has earned national distinction by creating certified monarch butterfly waystations at our Calumet, Egan, O’Brien and Stickney Water Reclamation Plants (WRPs). The waystations are sunlit open spaces that offer a place for monarch butterflies to eat and rest as they migrate across North America yearly. Additionally, Cook County is part of the monarch butterfly’s annual migration route from Mexico to Canada. By planting milkweed and wildflowers, the MWRD created a safe and welcoming place for the butterflies to recharge before continuing their journey. 

A monarch butterfly on a cluster of pink milkweed flowers