Mastered Meter Guide

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The following infoMobileHOmermation was put together by IID to help Mastered Meter customers correctly bill their tenants. Factors such as the ECA and enrollment in READY effect the way master meter customers bill tenants.

For more information, please contact IID's Customer Service Department at 1-800-303-7756.

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Master metered guide [PDF]

This month's worksheets

December 2025 worksheet [PDF]
December 2025 worksheet with a 20 percent READY discount [PDF]
December 2025 worksheet with a 30 percent READY discount [PDF]

ECA worksheets

2025
December 2025 worksheet [PDF]
November 2025 worksheet [PDF]
October 2025 worksheet [PDF]
September 2025 worksheet [PDF]
August 2025 worksheet [PDF]
July 2025 worksheet [PDF]
June 2025 worksheet [PDF]
May 2025 worksheet [PDF]
April 2025 worksheet [PDF]
March 2025 worksheet [PDF]
February 2025 worksheet [PDF]
January 2025 worksheet [PDF]
2024
December 2024 worksheet [PDF]
November 2024 worksheet [PDF]
October 2024 worksheet [PDF]
September 2024 worksheet [PDF]
August 2024 worksheet [PDF]
July 2024 worksheet [PDF]
June 2024 worksheet [PDF]
May 2024 worksheet [PDF]
April 2024 worksheet [PDF]
March 2024 worksheet [PDF]
February 2024 worksheet [PDF]
January 2024 worksheet [PDF]
2023
December 2023 worksheet [PDF]

ECA worksheets with 20 percent READY discount

2025
December 2025 worksheet with a 20 percent READY discount [PDF]
November 2025 worksheet with a 20 percent READY discount [PDF]
October 2025 worksheet with a 20 percent READY discount [PDF]
September 2025 worksheet with a 20 percent READY discount [PDF]
August 2025 worksheet with a 20 percent READY discount [PDF]
July 2025 worksheet with a 20 percent READY discount [PDF]
June 2025 worksheet with a 20 percent READY discount [PDF]
May 2025 worksheet with a 20 percent READY discount [PDF]
April 2025 worksheet with a 20 percent READY discount [PDF]
March 2025 worksheet with a 20 percent REAP discount [PDF]
February 2025 worksheet with a 20 percent REAP discount [PDF]
January 2025 worksheet with a 20 percent REAP discount [PDF]
2024
December 2024 worksheet with a 20 percent REAP discount [PDF]
November 2024 worksheet with a 20 percent REAP discount [PDF]
October 2024 worksheet with a 20 percent REAP discount [PDF]
September 2024 worksheet with a 20 percent REAP discount [PDF]
August 2024 worksheet with a 20 percent REAP discount [PDF]
July 2024 worksheet with a 20 percent REAP discount [PDF]
June 2024 worksheet with a 20 percent REAP discount [PDF]
May 2024 worksheet with a 20 percent REAP discount [PDF]
April 2024 worksheet with a 20 percent REAP discount [PDF]
March 2024 worksheet with a 20 percent REAP discount [PDF]
February 2024 worksheet with a 20 percent REAP discount [PDF]
January 2024 worksheet with a 20 percent REAP discount [PDF]
2023
December 2023 worksheet with a 20 percent REAP discount [PDF]

ECA worksheets with 30 percent READY discount

2025
December 2025 worksheet with a 30 percent READY discount [PDF]
November 2025 worksheet with a 30 percent READY discount [PDF]
October 2025 worksheet with a 30 percent READY discount [PDF]
September 2025 worksheet with a 30 percent READY discount [PDF]
August 2025 worksheet with a 30 percent READY discount [PDF]
July 2025 worksheet with a 30 percent READY discount [PDF]
June 2025 worksheet with a 30 percent READY discount [PDF]
May 2025 worksheet with a 30 percent READY discount [PDF]
April 2025 worksheet with a 30 percent READY discount [PDF]
March 2025 worksheet with a 30 percent REAP discount [PDF]
February 2025 worksheet with a 30 percent REAP discount [PDF]
January 2025 worksheet with a 30 percent REAP discount [PDF]
2024
December 2024 worksheet with a 30 percent REAP discount [PDF]
November 2024 worksheet with a 30 percent REAP discount [PDF]
October 2024 worksheet with a 30 percent REAP discount [PDF]
September 2024 worksheet with a 30 percent REAP discount [PDF]
August 2024 worksheet with a 30 percent REAP discount [PDF]
July 2024 worksheet with a 30 percent REAP discount [PDF]
June 2024 worksheet with a 30 percent REAP discount [PDF]
May 2024 worksheet with a 30 percent REAP discount [PDF]
April 2024 worksheet with a 30 percent REAP discount [PDF]
March 2024 worksheet with a 30 percent REAP discount [PDF]
February 2024 worksheet with a 30 percent REAP discount [PDF]
January 2024 worksheet with a 30 percent REAP discount [PDF]
2023
December 2023 worksheet with a 30 percent REAP discount [PDF]
Please note: ECA worksheet, schedule D does not include the monthly customer charge imposed to Mastered Meter Owner customers. The customer charge covers the district’s costs for meter reading, billing, and related administrative costs. Mastered Metered Owners shall determine their costs associated with providing these services to their tenants. 

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