Bill Estimator San Juan Capistrano

Improvement Districts Covered: 9 (San Juan Capistrano)

Bill Estimator

The bill calculator provides a convenient way to estimate your bill based on ID 9 adopted rates.

Step 1. Using your most recent bill, complete the highlighted fields.

Step 2. Scroll to the table and view the estimated monthly bill. You may toggle between tabs to compare your estimated bills.

For more information, please contact Customer Relations at (949) 459-6420 or

Rate Calculator

Using your most recent bill, fill out the fields below. Each time you leave a field the form will automatically recalculate. Use the Water Use slider to adjust your CCF usage to calculate your bill.

Water Budget

Indoor Budget
Outdoor Budget
Total Budget

Water Use*

1 CCF is 1 billing unit and equal to 748 gallons.

**Please note: This calculator is for estimating monthly bill amount only. Your actual monthly bill will vary based on actual meter size, number of days in the billing cycle, and actual weather. In addition, capital charges will be billed separately through your property tax bill.

* The average monthly single-family household water use is 14 CCF.  Please see your bill for your appropriate CCF usage.  Water use may be lower in winter, higher in summer. SMWD measures consumption in Hundred Cubic Feet (CCF). 1 CCF = 748 Gallons.

** Your outdoor budget will adjust with the weather; in summer the outdoor budget will be greater than in winter.  This calculator uses the annual monthly average evapotranspiration rate of 4".  For more information on how the District uses weather data please visit our weather page.

Disclaimer of Warranties / Accuracy of Data

Although an effort is made to assure the accuracy and completeness of the information provided on the Santa Margarita Water District (District) website, the District makes no express or implied warranty as to the accuracy, adequacy, completeness, legality, reliability or usefulness of the website's information. The District provides this information and all online services on an "as is" basis. While there may be changes to District information on topics covered on the website, these changes may or may not be made available on the website.

While the District uses reasonable efforts to provide accurate and up-to-date information, some of the information provided is gathered by third parties and has not been independently verified by the District. You agree that all use of these services is at your own risk, and that the District will not be held liable for any errors or omissions contained in the content of its services.

This simple calculator uses irrigable area to calculate an average monthly bill for residential lots.  For the sake of this simple calculator, generalized irrigable areas for residential groups have been grouped as such:

Lot Size (sq.ft.)

Irrigable Area (sq.ft.)

0 – 4,000


4,001 – 8,000


8,001 – 15,000


15,001 – 50,000


> 50,000


This calculator also assumes a 30-day read cycle and uses historical average monthly evapotranspiration (a weather factor) to calculate outdoor budgets.