what is an unregulated compound?

An unregulated compound means that the compound is not part of the mandatory water quality testing required by federal and state drinking water standards.

what is a health advisory?

Health advisories are established by the EPA to provide a level of protection for all Americans throughout their lifetime from any adverse health effects resulting from exposure to chemicals in drinking water. The health advisory is designed to protect the most sensitive populations: fetuses during pregnancy and breastfeeding infants.

All water quality information for unregulated compounds provided by Marana Water will be compared to lifetime health advisories.  A lifetime health advisory is the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for a lifetime of exposure.

You can find more information here

is the quality of my water ok?

All Marana Water systems meet the current required federal and state water quality standards for drinking water established by the Environmental Protection Agency under the Safe Drinking Water Act. However, as your local water professionals, we also know that not every chemical compound or microbiological risk is regulated. By staying aware of our local environment and the environment of our nation, we can conduct additional, voluntary water quality sampling to help us understand and identify potential issues before they become a drinking water regulated item. Activities like this sampling program will allow us to effectively plan for possible additional infrastructure and treatment options in a proactive, not reactive, manner.

How did these compounds end up in our water?

To date, a source(s) has not been identified.  Marana Water has been sharing data and working closely with the Arizona Department of Environmental Quality and other local water and water reclamation agencies to share data and identify potential sources.

what have we done since discovering the presence of the unregulated compounds 1,4-dioxane and pfas?

In December 2017, Marana Water completed a seven month study resulting in an Alternatives Evaluation and Implementation Plan to best determine how to reduce concentrations of 1,4 – dioxane and per- and polyfluoroalkyl substances (PFAs) in specific water systems.  Specifically, the report examined:

·         Review of existing water infrastructure (wells, boosters, storage facilities, etc.)

·         Alternative water sources

·         Blending opportunities

·         Treatment alternatives

·         Completion of conceptual designs and preliminary engineering of treatment alternatives.

what are the next steps?

Marana Water will continue to perform discretionary sampling and provide updated results on the water quality page here. Additionally, Marana Water is currently working with Arizona Department of Environmental Quality (ADEQ) and other water and water reclamation agencies in the region to combine data in order to determine the source of the compound, why this compound is present in our region, and what steps are necessary to mitigate any occurrence of this in the future.  Some of these future steps may include building additional infrastructure to use water from other sources or using advanced treatment processes at the water source.  We will also continue to seek guidance from ADEQ and the EPA on drinking water standards related to unregulated compounds. 

what units are water quality compounds measured in?

Typically, most water quality compounds are measured in milligrams/liter. As laboratory analytical methods improve, scientists are able to test to lesser amounts.



Chlorine is added to water in small amounts for disinfection. Like other water providers, Marana Water is required to maintain a detectable disinfectant residual in the distribution system to protect the public water system. Higher temperatures can cause a more distinct chlorine taste and smell in the water.

Why is my water white when it first comes out of the tap?

This is most often caused by very tiny air bubbles in the water which will typically clear up as the air escapes to the atmosphere. It is not harmful to health or plumbing.

What is the difference between water hardness and salinity?

Hard water is the measure of calcium and magnesium, while salinity is the measure of Total Dissolved Solids (TDS) including calcium, magnesium, potassium, and sodium.

What is the specific water hardness?

Marana Water has provided a water hardness table here. This information is noted in grains per gallon (GPG) or parts per million (PPM). If installing a water softener, please check which measurement is used.

what is a consumer confidence report (CCR)?

A CCR is required by the Safe Drinking Water Act to be prepared each year for public water systems. This report puts together information on water sources, levels of detected contaminants, and showing compliance with drinking water rules. These reports are mailed to all customer's homes before the end of July, and are posted online. To view current and past versions of the CCR, click here.

disposal of expired medications.

Do NOT dispose unused or expired medications down the toilet. Disposing of these medicines properly on a regular basis, at the proper location, prevents them from getting into the sanitary sewer system. Wastewater is treated and then discharged into riverbeds or recharged into the aquifer. While our water reclamation facility cleans water exceptionally well and complies with federal and state requirements, it is nearly impossible to remove all medications and other elements from the processed water. The Town holds several dispose-a-med events throughout the year, and more information about Pima County's program can be found here.

Does my home need a water treatment system?

No. Marana water strives to provide water that meets all federal regulations. Adding a water treatment system to your home is a personal preference. The Environmental Protection Agency (EPA) has published a few documents providing some basic information about different types of systems. Click here to find out more.

It is important to follow manufacturer's specifications on cleaning and maintenance of these devices to avoid any potential problems caused by lack of maintenance or cleaning.

Is there added fluoride to the water?

No. Marana Water does not add any additional fluoride to the drinking water system. Some naturally occurring fluoride may be present due to the minerals in the aquifer.

For questions related to backflow assemblies, please click here.