[Updated 7/12/21]

As a result of the changing circumstances with the spread of COVID-19, the office will be closed to the public to protect the customers and staff through increased social distancing. At this time, IEUA staff will be working and handling requests remotely.

Board meetings will take place via conference calls until further notice. A call in number will be provided on the agenda for members of the public who would like to listen in on the meeting.

Water Connection Fees and Regional Connection Requests will be handled electronically.

Water Connection Fee: Mail checks along with retail agency paperwork, receipt from retail agency for payment, site plans to P.O. Box 9020, Chino Hills, CA 91709. The supporting documentation along with copy of check can be emailed to For questions, please contact (909) 313-9604.

Once we receive and process your payment and supporting documentation, we will email you the receipt and anything else you need.

Utility | Regional connection requests, please contact Liza Munoz via email at

As of May 26, 2020, IEUA has resumed its free Regional Water-Use Efficiency Programs. If you would like any information on water saving programs or rebates, please contact Lisa Morgan-Perales via email at or contact the IEUA Water Use Efficiency Hotline at 909-993-1952.

For general questions, please call (909) 993-1600 or email

Thank you for your patience, and we apologize for this inconvenience. Please contact us if you have any questions or concerns.

Owlie’s Virtual Adventures

Learn about all things water at home with our free, educational resources! Visit the Owlie’s Virtual Adventures page to get started.