Report a Water Main Break


During normal business hours, call:
  • Coralville Water Plant at 319.248.1770 (Monday-Friday, 7:00 am-3:30 pm)
  • Utility Billing Department at 319.248.1715 (Monday-Friday, 8:00 am-5:00 pm)

Evenings, Weekends, & Holidays

After hours, call:
  • After hours water emergency, 319.530.6225

Utility Bills & Accounts

Start or Stop Service

To start or stop utility service:
  • Start or stop service online, or
  • Contact Utility Billing at 319.248.1715, or
  • Visit Coralville City Hall, 1512 7th St, Coralville, IA 52241

Do you need help paying rent or utility bills due to COVID-19?

Residential Renters in Coralville May Be Eligible

Rental households in Coralville that have been impacted by COVID-19 may be eligible for assistance paying utility bills or rent through the Iowa Rent and Utility Assistance Program, which is a state program, opening in March 2021.

Learn about the state program, request more time to pay your City utility bill, or fill out a form to request your City utility bill late fees to be suspended and avoid your water being shut off: Get utility bill help

About Coralville Water

Water Quality

Water quality at the lowest cost has always been our primary commitment at City of Coralville Municipal Water. We also believe the best way to assure you that the water is safe is by providing you with accurate information about the way the water is treated.

Water Treatment

Coralville water originates in underground layers known as aquifers. About half of the water comes from the Jordan Aquifer at a level of about 1600 feet deep; approximately 30% comes from the Silurian Aquifer, which is about 500 feet deep; and the rest from the shallow wells at around 100 feet deep.

All the water is pumped to the treatment plant where it is blended and then aerated to remove hydrogen sulfide gas. Water flows by gravity to the filters where iron and manganese are removed. After filtration the water is chlorinated then stored in reservoirs until pumps at the Booster Station send it to the distribution systems or to the water towers.

Water Testing

The water is tested daily for chlorine, weekly for bacteria contamination, quarterly for nitrates, and other specific contaminants as required by the Environmental Protection Agency. We have been fortunate that our water source has remained free from contamination with little change in quality over the years.

Documents & Resources

Water Reports

Public Notice

Backflow Prevention

New Reporting Requirements (Effective December 15, 2020)
  • Please note that there are changes to the backflow reporting requirements. View Contractor Notification (PDF)
  • Beginning December 15, 2020, all backflow tests must be reported using www.thecomplianceengine.com. Any backflow reports submitted using any other reporting method will not be considered complete and will be considered non-compliant. 
City Code

Water Service Lines

  • To see the parts of a water service line and learn what the property owner is responsible for, view our water service line diagram.