Water and wastewater rates

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Current wastewater rates in the Luke 303 District

Rates, tariffs, rules & regulations

Updated wastewater tariff rules and regulations have been approved

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current water rates in the Mohave District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current water rates in the Paradise Valley District

Rates, tariffs, rules & regulations

Paradise Valley water district tariff - Effective February 1, 2024

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current water and wastewater rates in the Rio Verde District

In April 2024, the ACC approved new water and wastewater service rates*. These new rates are effective April 1, 2024, and more accurately reflect recent costs to provide safe and reliable service.

As a result of this Decision, the ACC authorized a partial consolidation approach that partially consolidates the rates for the Rio Verde wastewater district to recover cost increases for the Rio Verde wastewater district without having to increase residential rates for services.

*Decision No. 79342, Dockets #WS-01303A-22-0236, WS-02156A-22-0237

Rates, tariffs, rules & regulations

Current water and wastewater rates in the San Tan District

Rates, tariffs, rules & regulations

Central Arizona Groundwater Replenishment District

The Central Arizona Groundwater Replenishment District (CAGRD) is a division of the Central Arizona Project that helps water users in Maricopa, Pima and Pinal counties meet their water supply needs. As a Member Service Area of the CAGRD, the San Tan district pays the CAGRD an annual invoice and assesses a CAGRD adjuster fee to customers to defray this expense. This fee shows up as a regular, recurring line item in customers' monthly water bills. The fee assessed to customers is approved by the ACC through a proposal filed each October.

The fee is based on actual water use within the San Tan system along with the CAGRD's current rates and adjusts annually. Depending on where you live within the San Tan service territory, this adjustment may show up as a slight increase or decrease in the CAGRD line item on your water bill.

The CAGRD can be complicated to understand, but plays a critical role in assuring a guaranteed water supply for water users in Maricopa, Pima, and Pinal counties. For more information about how the CAGRD works, please visit the Central Arizona Project website.

CAGRD adjustor fee FAQs

Depending on where you live in Arizona, your water could be surface water from a river, groundwater from an underground aquifer, or a combination of both. Water for San Tan customers comes only from the aquifer, which must be replenished for future uses.

Under state law, water systems in central Arizona that rely on groundwater – like San Tan – can replenish that groundwater through the Central Arizona Groundwater Replenishment District (CAGRD). EPCOR's San Tan water district has been a CAGRD Member Service Area since 2000.

The Arizona Legislature established the Central Arizona Groundwater Replenishment District (CAGRD) in 1980 to help water users in Maricopa, Pinal and Pima counties meet their 100-year assured water supply requirements under state law. The CAGRD is operated by the Central Arizona Water Conservation District, which also oversees the Central Arizona Project (CAP).

You can find more details about the CAGRD and its role in protecting water supplies in Central Arizona at www.cagrd.com.

The CAGRD exists to protect, preserve and replenish our water resources for Arizonans now and in the future. To accomplish this mission, CAGRD acquires water supplies and replenishes the aquifer. As a member of the CAGRD, EPCOR's San Tan water district pays the CAGRD an annual invoice and assesses a CAGRD adjuster fee to its customers to cover this expense.

The CAGRD adjuster fee is based on several factors including actual groundwater water use within the San Tan system, CAGRD's current rates and any under or over-collection from past years. The CAGRD fee adjusts annually and must be approved by the Arizona Corporation Commission. The rate our San Tan customers pay is based on individual water usage and which Active Management Area (AMA) customers live in. The money EPCOR collects is used to pay CAGRD – we don't keep any of it.

Depending on where they live, San Tan customers are in either the Phoenix AMA or Pinal AMA, and the fees vary by AMA. Your water bill specifies which AMA you live in.

The names can be a bit confusing: your AMA is not determined by your county or city, but by which water basin you live in. You can live in Pinal County and be part of either the Pinal AMA or the Phoenix AMA.

You can learn more about AMAs in Arizona here.

No. As a San Tan customer, you only pay through your monthly water bill.

Several factors have impacted the 2022 CAGRD fee on your bill:

CAGRD fees previously were being offset with state exemptions that have now expired.
The CAGRD fee for San Tan customers in the Phoenix AMA was under-collected for the past decade under prior ownership.
The 2021 CAGRD fee approved by the Arizona Corporation Commission was lower than the actual cost invoiced by the CAGRD in that calendar year.

Our top priority is providing clean, safe and reliable water service for our customers, now and in the future. And because CAGRD fees are based on groundwater used, we're doing several things now and over the next few years to help our customers and reduce the San Tan district's reliance on groundwater.

First, we're increasing the amount of water that we can return to the natural water cycle and the underground aquifer. To do this, we're expanding and building new water reclamation facilities. Our expansion of the Pecan Water Reclamation Facility is one example, and will be complete at the end of this month. The more water that we can return to the aquifer, the lower the CAGRD fee.

Second, we're working to identify additional water resources, which will further reduce the San Tan district's reliance on groundwater. We've requested that the CAGRD replenishment fee be changed to a Sustainable Water Supply mechanism that will provide flexibility to tap more water resources for you, and we have just this year secured and started receiving a new surface water allocation for the San Tan district.

We've been the legal owner of your water system for just over a year and we continue to address lingering issues from the past. Being your water provider is a big responsibility – we take it very seriously and we're focused on improving every aspect of your service.

You can read more about EPCOR's multi-faceted, long-term approach to water supply and conservation here.

Other taxes and fees on your bill

Your bill from EPCOR provides you with detail on every tax or fee that may apply to your service. Here are a few examples – not all may apply to you. EPCOR does not keep any taxes collected.

Water Use Tax: Required by the state of Arizona on all water sales, it is charged at a rate of $0.0065 per thousand gallons. A customer who uses 10,000 gallons will see a charge of 7 cents on their bill.

State Tax: Also required by the state, this 5.6% tax is charged on all water service-related charges, including the basic service charge, how much water you use, and fees like CAGRD that we may collect.

Pinal County Tax: Required by Pinal County and previously called a “state tax" on your Johnson Utilities bill, the Pinal County tax is 1.6% of your “total water charges".

Town of Florence Tax: Charged only to customers within town limits, 2% of your “total water charges" are collected for the Town of Florence.

Town of Florence Franchise fee: Remitted to the Town of Florence, this fee allows EPCOR to work in easements and other facilities to keep your service safe and reliable. It is calculated as 5% of your water and wastewater charges, excluding CAGRD fees.

Town of Queen Creek Tax: Charged only to customers within town limits, 2.25% of your “total water charges" are collected for the Town of Queen Creek.

Current water rates in the Sun City District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current water rates in the Sun City West District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current water rates in the Sonoran District

On January 26, 2022, the Arizona Corporation Commission (ACC) voted to approve EPCOR’s 2020 water rate case. The ACC’s decision combined six districts together. Agua Fria, Anthem, Chaparral, Havasu, Tubac, and Willow Valley are now grouped as EPCOR’s Sonoran water district.

New rates initially went into effect February 1, 2022. The rates were phased in over a three year period. February 1, 2024 marked the third of final rate adjustment.

Rates, tariffs, rules & regulations

Sonoran water tariff - phase 3 - Effective March 1, 2024

Service areas within the Sonoran Water District

Agua Fria
Anthem
Chapparal
Havasu/Parker
Tubac
Willow Valley

ACC regulatory assessment charge

Each month, as an Arizona customer you will see the "ACC Regulatory Assessment Chrg" on your bill. This charge is adjusted each year and applies to both residential and non-residential customers.

Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and RUCO.

Current wastewater rates in the Sonoran District

EPCOR applied in August 2022 with the Arizona Corporation Commission (ACC) to review and update rates in the Arizona (Agua Fria, Anthem, Mohave, Sun City and Sun City West areas) wastewater, Luke 303 wastewater, and Rio Verde water and wastewater districts. In April 2024, the ACC approved new water and wastewater service rates*. These new rates are effective April 1, 2024, and more accurately reflect recent costs to provide safe and reliable service.

As a result of this Decision, the ACC authorized a partial consolidation for wastewater approach that fully consolidates rates for the Arizona and Luke 303 wastewater districts and partially consolidates the rates for the Rio Verde wastewater district without increasing Rio Verde wastewater residential rates. The newly consolidated wastewater districts will now be known as the Sonoran wastewater district.

Learn more about wastewater and wastewater services in Arizona.

Rates, Tariffs, Rules and Regulations

Learn more about how rates are set.

ACC regulatory assessment charge

As a customer of a regulated utility in Arizona, you will see the "ACC Regulatory Assessment Chrg" on your bill each month. This charge is adjusted each year and applies to both residential and non-residential customers. Included in the fees for those services is an assessment fee that all regulated utilities in Arizona pay to support the operational costs of the ACC and the Residential Utility Consumer Office (RUCO).

See where EPCOR provides wastewater service in Arizona.

*Decision No. 79342, Dockets #WS-01303A-22-0236, WS-02156A-22-0237

For more information on the regulatory process, visit Arizona Corporation Commission.

Third party disclaimer

EPCOR's website may provide listing of and/or links to third party websites as a convenient information service only. EPCOR accepts no responsibility or liability for the privacy practices, content, opinions, accuracy, and administration of such other websites, nor do we monitor or endorse these websites.

Water and wastewater rates

Current wastewater rates in the Luke 303 District

Rates, tariffs, rules & regulations

Updated wastewater tariff rules and regulations have been approved

ACC regulatory assessment charge

​Current water rates in the Mohave District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

Current water rates in the Paradise Valley District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

​Current water and wastewater rates in the Rio Verde District

Rates, tariffs, rules & regulations

Current water and wastewater rates in the San Tan District​​

Rates, tariffs, rules & regulations

​Central Arizo​​​na Groundwater Replenishme​nt District

​CAGRD adjustor fee FAQs​​

Other taxes and fees on your bill

Current water rates in the Sun City District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

Current water rates in the Sun City West District

Rates, tariffs, rules & regulations

ACC regulatory assessment charge

​Current water rates in the Sonoran District​

Rates, tariffs, rules & regulations

Service areas within the Sonoran Water District

ACC regulatory assessment charge

Current wastewater rates in the Sonoran District

Rates, Tariffs, Rules and Regulations

ACC regulatory assessment charge

Current water rates in the Mohave District

Current water and wastewater rates in the Rio Verde District

Current water and wastewater rates in the San Tan District

Central Arizona Groundwater Replenishment District

CAGRD adjustor fee FAQs

Current water rates in the Sonoran District