Frequently Asked Questions

 

1. Why is my Illinois EPA facility number wrong on the form?

For public water systems, the Water Inventory Program uses an extra digit, a “9” in the fourth place, to identify the systems as such in our database.

 

2. What is the SIC code?

The Standard Industrial Classification, or SIC code, is a system of classifying establishments by type of activity. The Water Inventory Program assigns SIC codes to facilities in order to make data classification and retrieval more efficient. For example, public water systems all have the code 4941, “Water Supply.” Electrical power generation facilities have the code 4911, “Electric Services.”

 

3. Should the Contact Person be the same as the person to whom the IWIP form is addressed?

Typically the form is addressed to a manager or administrator of some kind. The Contact Person is the person most knowledgeable about water use at the facility, and the person the Illinois State Water Survey can contact with any questions about the numbers reported.

 

4. What is Max Daily?

The maximum daily amount, or Max Daily, is the greatest daily amount withdrawn from a well or surface water intake in a 24-hour period during the specified year. Max Daily does not refer to how many gallons the well can pump if it is run nonstop for 24 hours.

 

5. Why are there duplicate numbers in the list of wells and surface water intake?

If the list includes both wells and surface water intakes, the intakes are listed after the wells and start with “1.” An intake does not have a depth. In addition, intakes should have a particular identifying name or the word “Intake.”

 

6. We don’t have any wells. Why should we fill out this form?

The Water Inventory Program tracks the use of both self-supplied water (that is, water withdrawn from wells or surface water intakes) and purchased water. If your facility does not have wells or intakes, leave the first part blank and go on to the next part of the form.

 

7. What is the difference between Total Annual Gallons Purchased and Total Annual Gallons Withdrawn?

Purchased water is the amount of water your facility buys from another facility. Withdrawn water is water your facility gets from its own wells or surface water sources.

 

8. As an operator, I know how much water is withdrawn from our wells and intakes. How do I figure things like population, residential and commercial services, and residential and commercial quantities?

Often the billing department of your facility will have figures for population within and outside city limits, as well as the breakdown of services and quantities.

 

9. We have a master meter that tells us the total amount of gallons withdrawn, but we do not have exact measurements of the amount from each source. How should we report the amount from different sources?

If your wells or other sources alternate consistently, simply divide the total amount by the number of active sources. If you know the percentage output from the sources, take the percentage of the total amount and report the result in gallons.

 

10. I received a Water Inventory form that asks for the form to be returned by December 15 of this year. How can I report the entire amount for the year if the year isn't over yet?

Some facilities are required to submit an LMO form to the Office of Water Resources in Chicago. These facilities receive the Water Inventory form at the same time as the LMO form. The LMO goes by the federal water year, which runs from October 1 to September 30. You can use the figures for the water year to report your water usage by December 15.

 

Illinois Water Inventory Program