Winter Quarter Averaging

The City of Corpus Christi uses Winter Quarter Averaging (WQA) to calculate residential wastewater charges. Since wastewater isn't directly metered, we use your winter water usage to estimate your wastewater output.

Screenshot of the Winter Quarter Average (WQA) Calculator website

Residential Winter Quarter Average (WQA) Calculator

Calculate your WQA using the Winter Quarter Average (WQA) Calculator website. The calculator gives detailed instructions on how to use your past bills to estimate the next year's WQA.

Go to https://wqa.corpuschristitx.gov

Here's what you need to know:

- WQA is based on water usage during winter months (lowest usage period)
- Calculated over three consecutive billing cycles between December 1, 2025 - March 31, 2026
- New rates will appear on your bill starting June 2026
- Charges remain fixed for one year

Money Saving Tip

Using less water during your winter averaging period can lower your wastewater charges for the entire year!

Get Help

For more information on your utility bill and WQA, please dial 3-1-1.

For More Information

For help paying your bill or changing your service call the Customer Call Center.

Call 311

About Us

Our mission is to provide the highest quality water and wastewater services that exceeds regulatory requirements and serves the region. We do this by upholding the highest standards, providing innovative solutions, leading strategic initiatives, and prioritizing continuous improvement. Corpus Christi Water also oversees wastewater management services and the Utility Billing Office.

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