UNREGULATED COMPOUNDS

To continue providing high quality service and product to our customers, in 2016 Marana Water began a voluntary water sampling program to test for the unregulated compounds 1,4-dioxane and PFAs. See the sample results and information below to learn more. 

The map below shows Marana Water's seven water systems. The colors of each system correspond to the charts below.

 

NOVEMBER UPDATE

Town of Marana has joined City of Tucson in a lawsuit filed Nov 8 in Pima County Superior Court as part of their ongoing effort to protect the public from any potential adverse health effects that could be caused by perfluorinated compounds (PFCs) that are present in portions of the groundwater supply.

Read the release.

OCTOBER 2018 UPDATE

Marana Town Manager Jamsheed Mehta wrote a letter to Town Council responding to questions about interim water consumption as the Town prepares to build two operational treatment plants for the Airline/Lambert and Picture Rocks water systems.

Read the letter.

Additionally, Arizona Department of Environmental Quality wrote a letter supporting Town of Marana’s efforts to address unregulated compounds in drinking water.

More information.

September 2018 update

Town Council approved Resolution No. 2018-091 on Tuesday, September 25 authorizing the creation of the Picture Rocks water treatment campus capital project and the Airline/Lambert water treatment campus capital projects. The resolution also authorizes the transfer of up to two million dollars in budgeted expenditure authority, and authorizes the application for a clean water state revolving fund loan from the Water Infrastructure Finance Authority of Arizona (WIFA) to fund the construction.

Town Council Presentation Slides

Marana Resolution No. 2018-091

View the Sept 25 Council presentation video.

August 2018 Update

The Town of Marana Council made a unanimous decision on Tuesday, August 14, 2018 to pursue design and construction of a water treatment facility for each of the two impacted systems in Marana Water found to contain unregulated compounds. Additional information can be found at the links below. 

August 15 Press Release

Town Council Presentation Slides

Video Recording of the August 14, 2018 Town Council Meeting


Click this link or on the image to the right for the the Groundwater Quality Improvement Report prepared in December 2017.


PFAs

What is PFOA and PFOS? How is it used?

PFOA and PFOS are part of a larger group of chemicals called perfluoroalkyl substances (PFASs) that were widely used in commercial products. They have a strong ability to repel other compounds so they were commonly used as stain protection on fabrics and clothing, non-stick cookware, furniture protection, paper food packaging protection (i.e. microwave popcorn bags, to-go food containers, etc.), as well as in firefighting foams. Most of the companies that use these compounds have phased out their use over the last ten years. However, because the compounds are highly stable and resistant to breakdown, they are commonly still found in the environment. 

 

Sampling details

The information below will help identify the testing results for specific neighborhoods. The chart on the left, reflects sampling data gathered from events in December 2016 and 2017. The colors correspond with the water systems in the map above. If you click on the image, it will enlarge for better viewing of the results.

 

how can PFOA and PFOS in the water affect my health?

The USEPA is continually testing and researching the likelihood that these compounds can be harmful in drinking water. While the research continues, the USEPA has established a lifetime health advisory of 70 parts per trillion for combined concentrations of PFOA and PFOS in order to protect the most sensitive populations:  fetuses during pregnancy and breastfed and/or formula-fed infants. Those included in the sensitive populations who consume water from a water system that has shown PFAS levels greater than the health advisory, you may want to take steps to limit or avoid consumption of water directly from the tap. While the department works on the next steps to address this issue, you may be able to treat water at home to reduce the levels of these compounds. 

What can i do to reduce my exposure to PFAS?

With respect to PFASs, there are two types of treatment that have shown to be somewhat effective in reducing or eliminating these compounds from the water. These treatments are activated carbon and reverse osmosis. Activated carbon filters are relatively common and can be found at most grocery stores and home improvement stores. Examples of these devices are filtering water pitchers and in-line refrigerator filters. Use of these devices has shown a positive effect in reducing or eliminating PFAS compounds, as well as others. Here is a link to a study using University of Arizona research showing the effectiveness of a few of these devices.  All in home treatment devices require consistent maintenance and care in order to remain effective. 

Quick links for PFAs

Drinking water Contaminants Standards

PFA Fact Sheet

If you would like to contact the Arizona Department of Environmental Quality (ADEQ) regarding unregulated compounds, click here


1,4 - Dioxane

What is 1,4-dioxane? How is it used?

1,4-dioxane is solvent stabilizer that is commonly used with other chemicals and products such as paints and waxes. It is also found in many regular household items such as shampoos, colognes, perfumes, and even some food products.

Sampling Details

The information below will help identify the testing results for specific neighborhoods. The chart on the left, reflects sampling data since October 2016. The colors correspond with the water systems in the map above. If you click on the image, it will enlarge for better viewing of the results.

 

how can 1,4-dioxane in the water affect my health?

Toxicological studies have yet to positively prove 1,4-dioxane is carcinogenic. However, the EPA is currently studying the effects of 1,4-dioxane in drinking water. They currently believe it is "likely" to cause cancer with long term exposure, though not definitive. The current guideline for drinking water is on a calculated risk potential that a person may have a one in one million chance for a health affect after drinking 2 liters per day for 70 years of water that is at or above a concentration of 0.35 ppb.

What can i do to reduce my exposure to 1,4-dioxane?

Since it is so widely used in common household products, people are exposed to 1,4-dioxane in many areas of their lives.  Review the list of compounds included in personal care and household products to identify if they contain any of the following words: PEG, Polyethylene, Polyethylene Glycol, Polyoxyethylene, -oxynol, -eth. Exposure to 1,4-dioxane can often be associated with the use of personal care products that contain these types of ingredients.

Quick links for 1,4-dioxane

1,4-dioxane Fact Sheet

If you would like to contact the Arizona Department of Environmental Quality (ADEQ) regarding unregulated compounds, click here